Engg. Mechanics Unit-4 Work, Power, Energy MCQ's

Last modified by Vishal E on 2019/02/15 15:54

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Engg. Mechanics Unit-4 Work, Power, Energy MCQ's

QUESTION
In which of the following case, is work being done? 

  1. A man pressing a wall 
  2. A coolie standing with a load of N on his head 
  3. A boy climbing up a stair case 
  4. None of the above 
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QUESTION
The work done by a force on a body will be positive if the 

  1. Body does not move 
  2. Body moves perpendicular to the direction of applied force 
  3. Body moves along the direction of the applied force 
  4. Body moves opposite to the direction of applied force 
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QUESTION
One Joule work is said to be done when 

  1. A force of 1 N displaces a body by 1 cm 
  2. A force of 1 N displaces a body by 1 m 
  3. A force of 1 dyne displaces a body by 1 cm 
  4. A force of 1 dyne displaces a body by 1 m 
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QUESTION
A boy weighing 350 N runs up a flight of 30 steps each 200 mm height . The work done is 

  1. 2100 J 
  2. 17500 J 
  3. 7000 J 
  4. None of the above 
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QUESTION
A man raises a box of 50 kg mass to a height 2 m in 2 minutes, while another man raises the same box to the same height in 5 minutes , the ratio of the work done is 

  1. one as to two 
  2. one as to one 
  3. two as to one 
  4. None of the above 
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QUESTION
A machine raises a load of 750 N through a height of 16 m in 5 s, the work done by machine is 

  1. 12000 J 
  2. 24000 J 
  3. 3750 J 
  4. None of the above 
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QUESTION
A man exerts a force of 200 N in pulling a cart of a constant speed of 16 m/s, the power spent by man is 

  1. 216 W 
  2. 3200 W 
  3. 184 W 
  4. None of the above 
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QUESTION
A boy of mass 40 kg runs upstairs and reaches 8 m high first floor in 5 s. The work done by him against gravity is ( take g = 10 m/s2) 

  1. 400 Nm 
  2. 320 Nm 
  3. 3200 Nm 
  4. None of the above 
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QUESTION
It takes 20 s for 'A' to climb up a stair while 'B' does the same in 15 s. Comparison of power develop by A and B is 

  1. 1:1 
  2. 1:2 
  3. 3:4 
  4. 4:3 
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QUESTION
A spring is kept compressed by a toy cart of mass 1 kg. On releasing a cart, it moves with a speed of 2 m/s.The Potential Energy of the spring is 

  1. 4 Nm. 
  2. 2 Nm 
  3. 1 Nm 
  4. 0.5 Nm 
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QUESTION
car A is running at at a speed of 15 kmph while another similar car B is moving at a speed of 30 kmph.The ratio of kinetic energies of car A & B is 

  1. 1 :2 
  2. 2:1 
  3. 1:4 
  4. 4:1 
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QUESTION
A body of mass 5 kg is taken from a height 5 m to 10 m, the increase in its potentional energy is (Take g = 10 m/s2) 

  1. 250 Nm 
  2. 75 Nm 
  3. 25 Nm 
  4. 50 Nm 
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QUESTION
The kinetic energy of a body of mass 2 kg moving with a speed of 10 m/s is 

  1. 20 Nm 
  2. 10 Nm 
  3. 100 Nm 
  4. 40 Nm 
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QUESTION
A man of 60 kg mass runs so that his kinetic energy is 750 Nm . The velocity of man is 

  1. 25 m/s 
  2. 5 m/s 
  3. 12.5 m/s 
  4. 45000 m/s 
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QUESTION
A mass of a moving cart is doubled keeping the velocity same, the kinetic energy 

  1. Remains same 
  2. Gets doubled 
  3. Gets Trippled 
  4. Will become half 
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QUESTION
A truck weighing 5 x 103 kg and a cart weighing 50 kg are moving with same speed. The comparison of kinetic energy of truck with cart. 

  1. 1:1 
  2. 1:10 
  3. 10:1 
  4. 1:2 
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QUESTION
The body of mass 2 kg having momentum 20 kg m/s . The kinetic energy of the body is 

  1. 10 Nm 
  2. 40 Nm 
  3. 80 Nm 
  4. 100 Nm 
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QUESTION
To keep the kinetic energy of the body same , if its mass is increased four times, the velocity will get 

  1. Doubled 
  2. Trippled 
  3. Halved or half 
  4. Remain Same 
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QUESTION
A machine raises a load of 100 N through a height of 8 m in 5 s, the power at which the machine works is 

  1. 800 W 
  2. 500 W 
  3. 4000 W 
  4. None of the above 
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QUESTION
A ball tied to a string is being whirled around a circle. What can you say about the work done by tension? 

  1. Tension does no work at all 
  2. Tension does negative work 
  3. Tension does positive work 
  4. None of the Above 
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QUESTION
A box is being pulled up a rough incline plane by a rope connected to a pulley. How many forces are doing work on the box? 

  1. One force 
  2. Two forces 
  3. Three forces 
  4. Four forces 
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QUESTION
By what factor does the Kinetic Energy of a car change when its speed is trippled? 

  1. No change at all 
  2. Factor of 3 
  3. Factor of 6 
  4. Factor of 9 
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QUESTION
Car 1 has double the mass of car 2, but their kinetic energies are same. What is the relation between their speed? 

  1. 2V1=V2 
  2. √2 V1=V2 
  3. 4V1 = V2 
  4. V1=V2 
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QUESTION
A box is being pulled across a rough floor at a constant speed, What can you say about the work done by friction? 

  1. Friction does no work at all 
  2. Friction does negative work 
  3. Friction does positive work 
  4. None of the Above 
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QUESTION
A car starts from rest and accelerates to 30 kmph. Later, it gets on a highway and accelerates to 60 kmph.Which part of journey takes more energy? 

  1. 0-30 kmph 
  2. 30-60 kmph 
  3. Both the same 
  4. None of the Above 
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QUESTION
How does the work required to stretch a spring by 20 mm compare with work required to stretch it by 10 mm? 

  1. Same amount of the work 
  2. Twice the work 
  3. Four time the work 
  4. Eight time the work 
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QUESTION
Mike performed 5 J of work in 10 seconds, Joy performed 3 J of work in 5 s, who produced more power? 

  1. Mike 
  2. Joy 
  3. Both produced the same amount of power 
  4. Zero power 
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QUESTION
At what point the potential energy of a body is taken to be Zero ? 

  1. At 1m above earth surface 
  2. At 5m above earth surface 
  3. On the earth surface 
  4. None of the above 
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QUESTION
If 20 joules of work is done in compressing spring from 0 to 60 mm, then how much work is done in compressing the same from 30 mm to 60 mm? 

  1. 5 J 
  2. 7 J 
  3. 15 J 
  4. 13 J 
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QUESTION
A particle of mass 20 gm is thrown vertically upwards with a speed of 10 m/s. Find the work done by the force of gravity during the time the particle goes up. 

  1. - 2. 0 J 
  2. -10.0 J 
  3. – 1. 0 J 
  4. - 1. 5 J 
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QUESTION
An elevator weighing 500 kg is to be lifted up at a constant velocity of 0.20 m/s. What would be the minimum horse power of the motor to be used? 

  1. 1000 W 
  2. 1200 W 
  3. 980 W 
  4. 880 W 
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QUESTION
A force F = (10 + 0.5x) acts on a particle in the x direction where F is in N and x in meter. Find the work done by this force during a displacement from x = 0 to x = 2.0 m. 

  1. 21 J 
  2. 31 J 
  3. 19 J 
  4. 20 J 
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QUESTION
A body dropped from a height h reaches the ground with a speed of 1. 2 √gh. Calculate the work done by air friction. 

  1. – 0. 38 mgh 
  2. – 0. 28 mgh 
  3. – 0. 48 mgh 
  4. – 0. 58 mgh 
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QUESTION
Two springs A and B (kA = 2kB) are stretched by applying the forces of equal magnitudes at ends. If the energy stored in A is E, then the energy stored in B is 

  1. E/2 
  2. 2E 
  3. E/4 
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QUESTION
The mass of cyclist together with bike is 90 kg. Calculate the increase in kinetic energy if speed increases from 6 kmph to 12 kmph. 

  1. 300 J 
  2. 375 J 
  3. 400 J 
  4. 575 J 
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QUESTION
A block of mass 2 kg moving at a speed of 10 m/s accelerates at 3 m/s2 for 5 s. Compute its final kinetic energy. 

  1. 625 J 
  2. 525 J 
  3. 300 J 
  4. 400 J 
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QUESTION
A box is pushed through 4 m across a floor offering 100 N resistance. How much work is done by a resisting force? 

  1. 400 J 
  2. 300 J 
  3. 425 J 
  4. 390 J 
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QUESTION
A block of mass 5 kg slides down an inclined plane of inclination 300 and length 10 m. Find the work done by the gravity force. 

  1. 235 J 
  2. 255 J 
  3. 225 J 
  4. 245 J 
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QUESTION
A spring is stretched by 50 mm by applying a force. Find the work done, if the force required for stretching 1mm of the spring is 10 N. 

  1. 11. 5 J 
  2. 13.0 J 
  3. 12.5 J 
  4. 14.5 J 
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QUESTION
Calculate the work done in pulling up a block of wood weighing 2 kN for a length of 10 m on a smooth plane inclined at an angle of 300 with the horizontal. 

  1. 10 kNm 
  2. 12 kNm 
  3. 9 kNm 
  4. 13 kNm 
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QUESTION
What power is needed to fill an overhead tank of capacity 60000 lit in two hours, if the water is to be lifted through a height of 30m? 

  1. 4250 W 
  2. 2450 W 
  3. 2540 W 
  4. 5420 W 
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QUESTION
What work will be done in lifting a tin of paint weighing 5 N from the ground floor to the second floor of a building? The height from the ground floor to second floor is 8 m. 

  1. 20 N 
  2. 60 N 
  3. 40 N 
  4. 80 N 
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QUESTION
Five men pushed a bus, which had a breakdown. The mass of the bus is 7 tonnes and the frictional resistance is 0.25 kN / tonne. Determine the work done by the men in pushing the bus at a constant speed over a distance of 15 m. 

  1. 26.25 kJ 
  2. 36.25 kJ 
  3. 30.00 kJ 
  4. 16.45 kJ 
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QUESTION
A man having a mass of 80 kg runs up a flight of stairs in 5 s. Determine the horse power required by the man, if the flight of the stair is 3.5 m high. 

  1. 548 W 
  2. 458 W 
  3. 845 W 
  4. 584 W 
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QUESTION
For throwing a ball of mass m , a spring gun is used. If the vertical spring of constant K is initially compressed by an amount δo, find the velocity Vo with which the ball will leave the gun. 

  1. Vo = δo ( K / m)1/2 
  2. Vo = δo ( 2K / m)1/2 
  3. Vo = δo ( K / 2m)1/2 
  4. Vo =2δo ( K / m)1/2 
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QUESTION
A spring having spring constant 600 N/m is stretched from its original unstretched length through 100 mm. The work done is 

  1. 60 Nm 
  2. 3Nm 
  3. 30 Nm 
  4. None of above 
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QUESTION
A vehicle of 1200 kg mass moving with a velocity of 20 m/s has a kinetic energy of 

  1. 120 kJ 
  2. 240 kJ 
  3. 360 kJ 
  4. 480 kJ 
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QUESTION
A block of mass ‘m’ starts moving with an initial velocity u on a horizontal plane. Find the coefficient of friction μ if the block stops after covering a distance ‘s’. 

  1. μ = u2 / gs 
  2. μ = 2u2 / 2gs 
  3. μ = u2 / gs 
  4. μ = u2 / 2gs 
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QUESTION
A car of mass 2000 kg is moving with a constant speed of 60 kmph, when the breaks are applied, causing a breaking force of 6 kN. Determine the distance travelled by the car before it comes to rest. 

  1. x = 43.3 m 
  2. x = 46.3 m 
  3. x = 64.3 m 
  4. x = 44.3 m 
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QUESTION
A bullet moving with a velocity of 165 m/s penetrates through a plank. The bullet has a velocity of 143 m/s, the moment it comes out of the plank. The number of planks through which it can penetrate before it comes to rest are 

  1. None of these 
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QUESTION
A long spring is stretched by 20 mm; its potential energy is U. If the spring is stretched by 100 mm, the potential energy stored in it will be 

  1. U / 25 
  2. U / 5 
  3. 5U 
  4. 25 U 
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QUESTION
What is unit of work? 

  1. Joules 
  2. N/m 
  3. Joules/meter 
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QUESTION
1 Joule is equal to 

  1. 1 N-m 
  2. 1 N-cm 
  3. 1 N/m 
  4. 1 N/cm 
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QUESTION
Which of the following statements is correct? 

  1. K.E. is by virtue of position 
  2. P.E. is by virtue of position 
  3. K.E. can be negative 
  4. P.E. can never be negative 
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QUESTION
A 10 kg body is dropped from a height of 50 m, find the K.E. of the body after 2 s 

  1. 5 x (19.62)2 J 
  2. 10 x (19.62)2 J 
  3. 5 x (9.81)2 J 
  4. 10 x (9.81)2 J 
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QUESTION
A 10 kg body is dropped from a height of 50 m, find the K.E. of the body after 1 s 

  1. 5 x (19.62)2 J 
  2. 10 x (19.62)2 J 
  3. 5 x (9.81)2 J 
  4. 10 x (9.81)2 J 
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QUESTION
A 5 kg body is dropped from a height of 50 m, find the K.E. of the body after 2 s 

  1. 5 x (19.62)2 J 
  2. 2.5 x (19.62)2 J 
  3. 2.5 x (9.81)2 J 
  4. 10 x (9.81)2 J 
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QUESTION
A 5 kg body is dropped from a height of 50 m, find the K.E. of the body after 1 s 

  1. 5 x (19.62)2 J 
  2. 2.5 x (19.62)2 J 
  3. 2.5 x (9.81)2 J 
  4. 10 x (9.81)2 J 
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QUESTION
A 10 kg body is dropped from a height of 25 m, find the K.E. of the body after 1 s 

  1. 5 x (19.62)2 J 
  2. 10 x (19.62)2 J 
  3. 5 x (9.81)2 J 
  4. 10 x (9.81)2 J 
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QUESTION
A 5 kg body is dropped from a height of 25 m, find the K.E. of the body after 2 s 

  1. 5 x (19.62)2 J 
  2. 2.5 x (19.62)2 J 
  3. 2.5 x (9.81)2 J 
  4. 10 x (9.81)2 J 
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QUESTION
A 20 kg body is dropped from a height of 50 m, find the K.E. of the body after 1 s 

  1. 20 x (9.81)2 J 
  2. 20 x (19.62)2 J 
  3. 10 x (9.81)2 J 
  4. 10 x (19.62)2 J 
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QUESTION
A 20 kg body is dropped from a height of 50 m, find the K.E. of the body after 2 s 

  1. 20 x (9.81)2 J 
  2. 20 x (19.62)2 J 
  3. 10 x (9.81)2 J 
  4. 10 x (19.62)2 J 
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QUESTION
A 20 kg body is dropped from a height of 25 m, find the K.E. of the body after 2 s 

  1. 20 x (9.81)2 J 
  2. 20 x (19.62)2 J 
  3. 10 x (9.81)2 J 
  4. 10 x (19.62)2 J 
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QUESTION
A 10 kg body is dropped from a height of 50 m, find the P.E. of the body after 1s 

  1. 10 x 9.81 x 45.095 J 
  2. 5 x 9.81 x 45.095 J 
  3. 0.5 x 9.81 x 45.095 J 
  4. 0.5 x 5 x 9.81 x 45.095 J 
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QUESTION
A 10 kg body is dropped from a height of 50 m, find the P.E. of the body after 2 s 

  1. 5 x 9.81 x 30.38 J 
  2. 9.81 x 30.38 J 
  3. 2 x 9.81 x 30.38 J 
  4. 10 x 9.81 x 30.38 J 
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QUESTION
A 10 kg body is thrown upward with a velocity of 20 m/s. Find the K.E. of the body after 2 s 

  1. 10 x (0.38) J 
  2. 10 x (0.38)2 J 
  3. 5 x (0.38)2 J 
  4. 5 x (0.38) J 
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QUESTION
A 10 kg body is thrown upward with a velocity of 20 m/s. Find the K.E. of the body after 1s 

  1. 5 x 10.19 J 
  2. 10 x 10.19 J 
  3. 5 x (10.19)2 J 
  4. 10 x (10.19)2 J 
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QUESTION
A 20 kg body is thrown upward with a velocity of 20 m/s. Find the K.E. of the body after 2 s. 

  1. 20 x (0.38) J 
  2. 20 x (0.38)2 J 
  3. 10 x (0.38) J 
  4. 10 x (0.38)2 J 
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QUESTION
A 20 kg body is thrown upward with a velocity of 20 m/s. Find the K.E. of the body after 1 s 

  1. 5 x 10.19 J 
  2. 10 x 10.19 J 
  3. 10 x (10.19)2 J 
  4. 20 x (10.19)2 J 
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QUESTION
A 10 kg body is thrown upward with a velocity of 50 m/s. Find the K.E. of the body after 2 s 

  1. 10 x 30.38 J 
  2. 15 x 30.38 J 
  3. 5 x (30.38)2 J 
  4. 0 J 
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QUESTION
A 10 kg body is thrown upward with a velocity of 50 m/s. Find the K.E. of the body after 1 s 

  1. 10 x (40.19) J 
  2. 10 x (40.19)2 J 
  3. 5 x (40.19) J 
  4. 5 x (40.19)2 J 
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QUESTION
A 10 kg body is thrown upward with a velocity of 50 m/s. Find the K.E. of the body after 3 s 

  1. 10 x 20.57 J 
  2. 10 x (20.57)2 J 
  3. 50 x (20.57)2 J 
  4. 5 x (20.57)2 J 
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QUESTION
A 10 kg body is thrown upward with a velocity of 50 m/s. Find the K.E. of the body after 4 s 

  1. 50 x (10.76) J 
  2. 10 x (10.76)2 J 
  3. 5 x (10.76) J 
  4. 5 x (10.76) 2 J 
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QUESTION
A 100 N force is acting at an angle of 60° on a body which is rest on the horizontal plane. Find the work done by the force when the body undergoes a horizontal distance of 1 m. 

  1. 100 J 
  2. 50 J 
  3. 0 J 
  4. None of the Above 
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QUESTION
A 100 N force is acting at an angle of 60° on a body which is rest on the horizontal plane. Find the work done by the force when the body undergoes a horizontal distance of 2 m. 

  1. 200 J 
  2. 20 J 
  3. 100 J 
  4. 0 J 
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QUESTION
A 100 N force is acting at an angle of 60° on a body which is rest on the horizontal plane. Find the work done by the force when the body undergoes a horizontal distance of 3 m. 

  1. 150 J 
  2. 300 J 
  3. 0 J 
  4. 200 J 
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QUESTION
Work done by a force is the product of ----- 

  1. Force & time 
  2. Force & velocity 
  3. Force & acceleration 
  4. Force & distance 
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QUESTION
A horizontal 50 N force is applied to a 10 kg body which makes the body to move horizontally through 0.50 m, what is work done by weight of the body? 

  1. 2.5 J 
  2. 25 J 
  3. 250J 
  4. 0 J 
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QUESTION
A 2 kg body is moving with constant acceleration of 4 m/s2 starting from rest. What is work done by the force acting on the body in 4 s.? (Assume no friction) 

  1. (80 N x 16 m) N-m 
  2. (20 N x 8 m) N-m 
  3. (8 N x 32 m) N-m 
  4. (40 N x 8m) N-m 
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QUESTION
A 10 kg body is moving with constant acceleration of 1 m/s2 starting from rest. What is Kinetic Energy of the body after 5 s.? 

  1. 12.5 J 
  2. 1250 J 
  3. 1. 25 J 
  4. 125 J 
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QUESTION
A 10 kg body is moving with constant acceleration of 2 m/s2 starting from rest. What is Kinetic Energy of the body after 5 s.? 

  1. 50J 
  2. 500J 
  3. 5J 
  4. 25J 
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QUESTION
A 5 kg body is moving with constant acceleration of 2 m/s2 starting from rest. What is Kinetic Energy of the body after 5 s.? 

  1. 25 J 
  2. 2.5 J 
  3. 2500 J 
  4. 250 J 
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QUESTION
A 5 kg body is moving with constant acceleration of 1 m/s2 starting from rest. What is Kinetic Energy of the body after 2 s.? 

  1. 0.1 J 
  2. 1 J 
  3. 100 J 
  4. 10 J 
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QUESTION
A 10 kg body is moving with constant acceleration of 2 m/s2 starting from rest. What is Kinetic Energy of the body after 2 s ? 

  1. 8 J 
  2. 80 J 
  3. 0.8 J 
  4. 800 J 
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QUESTION
A 5 kg body is moving with constant acceleration of 2 m/s2 starting from rest. What is Kinetic Energy of the body after 2 s ? 

  1. 0.4 J 
  2. 4 J 
  3. 400 J 
  4. 40 J 
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QUESTION
A 10 kg body is moving with constant acceleration of 4 m/s2 starting from rest. What is work done by the force acting on the body in 4 s ? (Assume no friction) 

  1. (10 N x 80 m) N-m 
  2. (10 N x 8 m) N-m 
  3. (10 N x 4 m) N-m 
  4. (100 N x 32 m) N-m 
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QUESTION
Calculate the work done by the gravity action on 70 kg student sliding down 300 inclined plane who slides a slant distance of 10 m. 

  1. 3430 J 
  2. 4330 J 
  3. 4444 J 
  4. 3034 J 
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QUESTION
What is Work Energy Principle? 

  1. Change in P.E. is equal to work done 
  2. Change in Total Energy is equal to work done 
  3. Change in K.E. is equal to work done 
  4. Change in P.E. is equal to loss in K.E. 
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QUESTION
A 1 kg body is dropped from a height of 5 m above the ground. What is total energy of the body at the instant when it is being dropped? 

  1. 49.05 J 
  2. 100 J 
  3. 5 J 
  4. 500J 
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QUESTION
A 1 kg body is dropped from a height of 5 m above the ground. What is total energy of the body as it strikes the ground? 

  1. 0 J 
  2. 2 J 
  3. 5 J 
  4. 49.05 J 
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QUESTION
A 5 kg body is moving down 45° incline from rest for which μK = 0.2. Which of the following principle is applicable for analysis? 

  1. Principle of Energy conservation 
  2. Principle of momentum conservation 
  3. Work Energy principle 
  4. Principle of virtual work. 
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QUESTION
A spring is kept in the vertical position with length 50 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 500 N (↑) 
  2. 500 N ( ↓) 
  3. 100 N (↑) 
  4. 100 N ( ↓) 
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QUESTION
A spring is kept in the vertical position with length 30 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 100 N (↑) 
  2. 100 N ( ↓) 
  3. 300 N (↑) 
  4. 300 N ( ↓) 
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QUESTION
A spring is kept in the vertical position with length 60 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 600 N (↑) 
  2. 400 N ( ↓) 
  3. 200 N (↑) 
  4. 200 N ( ↓) 
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QUESTION
A spring is kept in the vertical position with length 60 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 400 N ( ↓) 
  2. 1200 N ( ↓) 
  3. 800 N ( ↓) 
  4. 400 N (↑) 
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QUESTION
A spring is kept in the vertical position with length 70 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 1400 N (↑) 
  2. 800 N ( ↓) 
  3. 600 N (↑) 
  4. 600 N ( ↓) 
Unknown macro: showhide.

QUESTION
A spring is kept in the vertical position with length 20 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 200 N (↑) 
  2. 200 N ( ↓) 
  3. 400 N (↑) 
  4. 400 N ( ↓) 
Unknown macro: showhide.

QUESTION
A spring is kept in the vertical position with length 10 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 100 N (↑) 
  2. 400 N ( ↓) 
  3. 300 N (↑) 
  4. 300 N ( ↓) 
Unknown macro: showhide.

QUESTION
A spring is kept in the vertical position with length 20 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 400 N (↑) 
  2. 800 N ( ↓) 
  3. 400 N (↓) 
  4. 800 N ( ↓) 
Unknown macro: showhide.

QUESTION
A spring is kept in the vertical position with length 10 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 800 N (↑) 
  2. 200 N ( ↓) 
  3. 600 N (↑) 
  4. 600 N ( ↓) 
Unknown macro: showhide.

QUESTION
A spring is kept in the vertical position with length 10 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 30 N/cm, find the force in the spring. 

  1. 300 N ( ↓) 
  2. 900 N ( ↓) 
  3. 900 N (↑) 
  4. 1200 N (↑) 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 50 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 500 N ( ↓) 
  2. 400 N (←) 
  3. 100 N (←) 
  4. 200 N ( ↓) 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 30 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 300 N (←) 
  2. 400 N (→) 
  3. 100 N(←) 
  4. 100 N (→) 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 70 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 700 N(←) 
  2. 300 N(→) 
  3. 300 N(←) 
  4. 400 N(→) 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 20 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 200 N(←) 
  2. 400 N (→) 
  3. 800 N(←) 
  4. 200 N (→) 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 10 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 10 N/cm, find the force in the spring. 

  1. 400 N (←) 
  2. 100 N (→) 
  3. 300 N (←) 
  4. 300 N (→) 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 60 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 1200 N (←) 
  2. 800 N (→) 
  3. 400 N (←) 
  4. 0 N 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 10 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 600 N (→) 
  2. 200 N (←) 
  3. 800 N (→) 
  4. 0 N 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 50 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 800 N (←) 
  2. 1000 N (→) 
  3. 100 N (→) 
  4. 200 N (←) 
Unknown macro: showhide.

QUESTION
A spring is kept in the horizontal position with length 30 cm. If undeformed length of the spring is 40 cm & stiffness of the spring is 20 N/cm, find the force in the spring. 

  1. 600 N (→) 
  2. 200 N (→) 
  3. 800 N (→) 
  4. 0 N 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 40 cm. Determine the work done by the spring force if spring constant is 10 N/cm. 

  1. 500 J 
  2. 600 J 
  3. -500 J 
  4. -600J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 50 cm. Determine the work done by the spring force if spring constant is 10 N/cm. 

  1. 2000 J 
  2. 200 J 
  3. -200 J 
  4. -2000J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 50 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. 4000 J 
  2. -4000 J 
  3. 100 J 
  4. 50 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 40 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. 300 J 
  2. 500 J 
  3. -1000 J 
  4. 1000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 35 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. -250 J 
  2. 250 J 
  3. 500 J 
  4. 1000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 20 cm. Determine the work done by the spring force if spring constant is10 N/cm. 

  1. 1000 J 
  2. 500 J 
  3. -500 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 10 cm. Determine the work done by the spring force if spring constant is 10 N/cm. 

  1. -2000 J 
  2. 50 J 
  3. -50 J 
  4. 100 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 15 cm. Determine the work done by the spring force if spring constant is 10 N/cm. 

  1. 1125 J 
  2. -1125 J 
  3. 500 J 
  4. -500 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 25 cm. Determine the work done by the spring force if spring constant is 10 N/cm. 

  1. 500 J 
  2. 125 J 
  3. 0 J 
  4. -125 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 45 cm. Determine the work done by the spring force if spring constant is 10 N/cm. 

  1. 1125 J 
  2. -1125 J 
  3. 500 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 40 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. 500 J 
  2. -500 J 
  3. -1500 J 
  4. 1000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 50 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. 100 J 
  2. 50 J 
  3. 4000 J 
  4. -6000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 35 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. -375 J 
  2. 500 J 
  3. 0 J 
  4. -500 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 45 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. 40J 
  2. -40 J 
  3. -3375 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 55 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. 100 J 
  2. 50 J 
  3. -6250 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 20 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. -1000 J 
  2. 100 J 
  3. 10 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 10 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. 500 J 
  2. -500 J 
  3. -4000 J 
  4. 10 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 15 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. 0 J 
  2. 100 J 
  3. -2250 J 
  4. 500 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 25 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. 5 J 
  2. 10 J 
  3. 15 J 
  4. -250 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 5 cm. Determine the work done by the spring force if spring constant is 20 N/cm. 

  1. 100 J 
  2. 50 J 
  3. -6250 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 20 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. -1500 J 
  2. 100 J 
  3. 50 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 10 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. 100 J 
  2. 50 J 
  3. 0 J 
  4. -6000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 15 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. 500 J 
  2. 100 J 
  3. -3375 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 5 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. -9375 J 
  2. 0 J 
  3. 100 J 
  4. 1000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 30 cm is stretched to 25 cm. Determine the work done by the spring force if spring constant is 30 N/cm. 

  1. 300 J 
  2. -375 J 
  3. 400 J 
  4. 1000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 10 cm is stretched from 20 cm to 30 cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. -1500 J 
  3. 100 J 
  4. 50 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 10 cm is stretched from 15 cm to 25 cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. 500 J 
  3. -1000 J 
  4. 100 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 10 cm is stretched from 20 cm to 25 cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. -625 J 
  2. 0 J 
  3. 100 J 
  4. 50 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 10 cm is stretched from 25 cm to 30 cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. 100 J 
  3. 1000 J 
  4. -875 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 10 cm is stretched from 15 cm to 30 cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. -1875 J 
  3. 50 J 
  4. 10 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 20 cm is stretched from 25 cm to 30 cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. 100 J 
  3. -375 J 
  4. 1000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 20 cm is stretched from 30 cm to 40 cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. -100 J 
  2. 200 J 
  3. -1500 J 
  4. 50 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 20 cm is stretched from 30 cm to 35cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. -625 J 
  2. 625 J 
  3. 0 J 
  4. -1000J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 20 cm is stretched from 25 cm to 35cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. -225 J 
  3. -875 J 
  4. -100 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 40 cm is stretched from 10 cm to20cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 2500 J 
  2. -2500 J 
  3. 500 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 40 cm is stretched from 10 cm to30cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. 50 J 
  3. -50 J 
  4. 4000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 40 cm is stretched from 20 cm to30cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 0 J 
  2. 100 J 
  3. 1500 J 
  4. 2000 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 40 cm is stretched from 25 cm to30cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 1000 J 
  2. 625 J 
  3. 50 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A spring of undeformed length 40 cm is stretched from 30 cm to 35cm. Determine the work done by spring force if spring constant is 10 N/cm. 

  1. 375 J 
  2. 0 J 
  3. 50 J 
  4. -100 J 
Unknown macro: showhide.

QUESTION
A body of weight 10 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.1 m. 

  1. 0 J 
  2. 0.5 J 
  3. 1 J 
  4. 5 J 
Unknown macro: showhide.

QUESTION
A body of weight 10 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.2 m. 

  1. 0 J 
  2. 0.5 J 
  3. 1 J 
  4. 5 J 
Unknown macro: showhide.

QUESTION
A body of weight 10 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.3 m. 

  1. 0 J 
  2. 1 J 
  3. 2 J 
  4. 1. 5 J 
Unknown macro: showhide.

QUESTION
A body of weight 10 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.4 m. 

  1. 0 J 
  2. 1 J 
  3. 2 J 
  4. 1. 5 J 
Unknown macro: showhide.

QUESTION
A body of weight 10 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.5 m. 

  1. 0 J 
  2. 2.5 J 
  3. 1 J 
  4. 2 J 
Unknown macro: showhide.

QUESTION
A body of weight 20 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.1 m. 

  1. 1 J 
  2. 0 J 
  3. 2 J 
  4. 3 J 
Unknown macro: showhide.

QUESTION
A body of weight 20 N is moving down a 30 degree inclined plane. Find the work done by the weight if the body moves through a distance of 0.2 m. 

  1. 1 J 
  2. 0 J 
  3. 2 J 
  4. 5 J 
Unknown macro: showhide.

QUESTION
A body of weight 20 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.3 m. 

  1. 1 J 
  2. 2 J 
  3. 4 J 
  4. 3 J 
Unknown macro: showhide.

QUESTION
A body of weight 20 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.4 m. 

  1. 1 J 
  2. 2 J 
  3. 4 J 
  4. 3 J 
Unknown macro: showhide.

QUESTION
A body of weight 20 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.5 m. 

  1. 1 J 
  2. 3 J 
  3. 0 J 
  4. 5 J 
Unknown macro: showhide.

QUESTION
A body of weight 30 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.1 m. 

  1. 1. 5 J 
  2. 0 J 
  3. 1 J 
  4. 2 J 
Unknown macro: showhide.

QUESTION
A body of weight 30 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.2 m. 

  1. 2 J 
  2. 3 J 
  3. 4J 
  4. 5 J 
Unknown macro: showhide.

QUESTION
A body of weight 30 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.3 m. 

  1. 2 J 
  2. 1 J 
  3. 0 J 
  4. 4.5 J 
Unknown macro: showhide.

QUESTION
A body of weight 30 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.5 m. 

  1. 5 J 
  2. 6 J 
  3. 7.5 J 
  4. 0 J 
Unknown macro: showhide.

QUESTION
A body of weight 40 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.1 m. 

  1. 0 J 
  2. 2 J 
  3. 3 J 
  4. 4 J 
Unknown macro: showhide.

QUESTION
A body of weight 40 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.2 m. 

  1. 0 J 
  2. 2 J 
  3. 3 J 
  4. 4 J 
Unknown macro: showhide.

QUESTION
A body of weight 40 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.3 m. 

  1. 6 J 
  2. 8 J 
  3. 10 J 
  4. 12 J 
Unknown macro: showhide.

QUESTION
A body of weight 50 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.2 m. 

  1. 5 J 
  2. 2.5 J 
  3. 10 J 
  4. 15 J 
Unknown macro: showhide.

QUESTION
A body of weight 50 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.3 m. 

  1. 5 J 
  2. 10 J 
  3. 7.5 J 
  4. 100 J 
Unknown macro: showhide.

QUESTION
A body of weight 50 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.4 m. 

  1. 5 J 
  2. 10 J 
  3. 15 J 
  4. 20 J 
Unknown macro: showhide.

QUESTION
A body of weight 50 N is moving down 30° inclined plane. Find the work done by the weight if the body moves through a distance of 0.5 m. 

  1. 5 J 
  2. 10 J 
  3. 15 J 
  4. 12.5 J 
Unknown macro: showhide.

QUESTION
The Pendulum is oscillating on either side of its rest position.The correct statement is 

  1. It has only Kinetic Energy 
  2. It has the maximum K.E. at its extreme position 
  3. It has the maximum P.E. at its rest position 
  4. The sum of its kinetic & potential energies remains constant throughout the motion. 
Unknown macro: showhide.

QUESTION
A lift is used to carry 8 persons through a height of 30 m in two minutes. If the average mass of each person is 95 kg, determine the power required. 

  1. 1375 W 
  2. 2174 W 
  3. 1742 W 
  4. none of the above 
Unknown macro: showhide.

QUESTION
A motor of 100 Hp moves with a uniform speed of 72 km/hr. The forward thrust applied by the engine on the car is 

  1. 3730 N 
  2. 3550 N 
  3. 3839 N 
  4. 3333 N 
Unknown macro: showhide.

QUESTION
A spring of stiffness 1000 N/m is stretched by 10 cm from the un-deformed position. Find the work of spring force. 

  1. – 10 Nm 
  2. – 5 Nm 
  3. – 15Nm 
  4. – 7Nm 
Unknown macro: showhide.

QUESTION
Impulse due to a force is the product of 

  1. Force & time 
  2. Force & velocity 
  3. Force & acceleration 
  4. Force & distance 
Unknown macro: showhide.

QUESTION
Rail road car A, of mass 25 Mg, moving with a speed of 0.5 m/s collides with car B, of mass 40 Mg which is at rest. After the impact, car A & B move towards right with a speed of 0.02 m/s and 0.3 m/s respectively. Find the coefficient of restitution between A and B. 

  1. 0.56 
  2. 0.65 
  3. 0.55 
  4. 0.66 
Unknown macro: showhide.

QUESTION
A small rubber ball is released from a height of 800 mm on a horizontal floor after the first bounce it raises to a height of 480 mm, compute the coefficient of restitution. 

  1. 0.4477 
  2. 0.7746 
  3. 0.4444 
  4. 0.5555 
Unknown macro: showhide.

QUESTION
Ball 1 collides with an another identical ball 2 at rest. For what value of coefficient of restitution e, the velocity of second ball become two times that of 1 after collision? 

  1. 1/3 
  2. 1/2 
  3. 1/4 
  4. 1/6 
Unknown macro: showhide.

QUESTION
Two solid rubber balls, A and B having masses 200 and 400 gm respectively are moving in opposite directions with velocity of A equal to 0.3 m/s. After collision the two balls come to rest , then the velocity of B is 

  1. 0.15 m/s 
  2. 1. 5 m/s 
  3. -0.15 m/s 
  4. None of the above 
Unknown macro: showhide.

QUESTION
A tennis ball bounces down a flight of stairs striking each step in turn and rebounding to the height of the step above. The coefficient of restitution is 

  1. 1/2 
  2. 1/√2 
  3. 1/4 
Unknown macro: showhide.

QUESTION
A particle of mass m1 moves with speed v and collides with a stationary particle of mass m2. The first particle continues to move in same direction if m1 / m2 is (e = coefficient of restitution) 

  1. = e 
  2. > e 
  3. < e 
  4. > e2 
Unknown macro: showhide.

QUESTION
A glass marble drops from a height of 3 meters upon a horizontal floor. If the coefficient of restitution be 0.9, find the height to which it rises after the impact. 

  1. 2.00m 
  2. 2.43m 
  3. 3.42m 
  4. 1. 00m 
Unknown macro: showhide.

QUESTION
A ball is dropped from a height of 9 meters upon a horizontal slab. If it rebounds to a height of 5.76 meters, the coefficient of restitution is: 

  1. 0.6 
  2. 0.4 
  3. 0.8 
  4. 0.9 
Unknown macro: showhide.

QUESTION
A ball dropped from a height h1 = 1600 mm is observed to rebound to a height h2 = 1100 mm from a horizontal floor. Determine the coefficient of restitution. 

  1. 0.60 
  2. 0.83 
  3. 0.93 
  4. 1. 00 
Unknown macro: showhide.

QUESTION
A 25 N force is applied to a body for 2 s , What is the impulse due to the applied force on to the body? 

  1. 25 Ns 
  2. 50 Ns 
  3. 2 Ns 
  4. 0 Ns 
Unknown macro: showhide.

QUESTION
A 50 N force is applied to a body for 3 s , What is the impulse due to the applied force on to the body? 

  1. 25 Ns 
  2. 50 Ns 
  3. 2 Ns 
  4. 150 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a body for 4 s, What is the impulse due to the applied force on to the body? 

  1. 4 Ns 
  2. 100 Ns 
  3. 400 Ns 
  4. 150 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a body for 3 s, What is the impulse due to the applied force on to the body? 

  1. 3 Ns 
  2. 300 Ns 
  3. 400 Ns 
  4. 150 Ns 
Unknown macro: showhide.

QUESTION
A 200 N force is applied to a body for 3 s, what is the impulse due to the applied force on to the body? 

  1. 3 Ns 
  2. 300 Ns 
  3. 600 Ns 
  4. 150 Ns 
Unknown macro: showhide.

QUESTION
A body weighing 25 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 2 s? 

  1. 25 Ns 
  2. 5 Ns 
  3. 0 Ns 
  4. 2 Ns 
Unknown macro: showhide.

QUESTION
A body weighing 25 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 4 s? 

  1. 25 Ns 
  2. 5 Ns 
  3. 0 Ns 
  4. 50 Ns 
Unknown macro: showhide.

QUESTION
A body weighing 25 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 6 s ? 

  1. 25 Ns 
  2. 5 Ns 
  3. 0 Ns 
  4. 75 Ns 
Unknown macro: showhide.

QUESTION
A body weighing 25 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 8 s ? 

  1. 25 Ns 
  2. 5 Ns 
  3. 100 Ns 
  4. 75 Ns 
Unknown macro: showhide.

QUESTION
A body weighing 25 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 10 s ? 

  1. 25 Ns 
  2. 125 Ns 
  3. 100 Ns 
  4. 75 Ns 
Unknown macro: showhide.

QUESTION
A body weighing 50 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 2 s ? 

  1. 25 Ns 
  2. 50 Ns 
  3. 0 Ns 
  4. 2 Ns 
Unknown macro: showhide.

QUESTION
A body weighing 50 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 4 s ? 

  1. 25 Ns 
  2. 50 Ns 
  3. 100 Ns 
  4. 2 Ns 
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QUESTION
A body weighing 50 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 6 s ? 

  1. 75 Ns 
  2. 150 Ns 
  3. 100 Ns 
  4. 2 Ns 
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QUESTION
A body weighing 50 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 8 s ? 

  1. 75 Ns 
  2. 50 Ns 
  3. 100 Ns 
  4. 200 Ns 
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QUESTION
A body weighing 50 N is kept over a smooth inclined plane which makes 30° with the horizontal. What is the impulse due to weight of the body during the time interval of 10 s ? 

  1. 75 Ns 
  2. 250 Ns 
  3. 100 Ns 
  4. 200 Ns 
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QUESTION
A 50 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 50 N force during a time interval of 2 s. 

  1. 100 Ns 
  2. 50 Ns 
  3. 75 Ns 
  4. 0 Ns 
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QUESTION
A 50 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 50 N force during a time interval of 3 s. 

  1. 100 Ns 
  2. 50 Ns 
  3. 75 Ns 
  4. 0 Ns 
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QUESTION
A 50 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 50 N force during a time interval of 4 s. 

  1. 100 Ns 
  2. 50 Ns 
  3. 75 Ns 
  4. 0 Ns 
Unknown macro: showhide.

QUESTION
A 50 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 50 N force during a time interval of 5 s. 

  1. 100 Ns 
  2. 50 Ns 
  3. 125 Ns 
  4. 0 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 100 N force during a time interval of 2 s. 

  1. 100 Ns 
  2. 50 Ns 
  3. 125 Ns 
  4. 0 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 100 N force during a time interval of 3 s. 

  1. 100 Ns 
  2. 150 Ns 
  3. 125 Ns 
  4. 0 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 100 N force during a time interval of 4 s. 

  1. 100 Ns 
  2. 150 Ns 
  3. 125 Ns 
  4. 200 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 100 N force during a time interval of 5 s. 

  1. 100 Ns 
  2. 250 Ns 
  3. 125 Ns 
  4. 200 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 100 N force during a time interval of 6 s. 

  1. 100 Ns 
  2. 250 Ns 
  3. 125 Ns 
  4. 300 Ns 
Unknown macro: showhide.

QUESTION
100 N force is applied to a body, moving over horizontal plane, at an angle of 60° with the horizontal. Find out the impulse due to 100 N force during a time interval of 10 s. 

  1. 100 Ns 
  2. 250 Ns 
  3. 500 Ns 
  4. 300 Ns 
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QUESTION
What is the range for values of e? 

  1. 0 to 1 
  2. 0 to 100 
  3. 10 to 100 
  4. 0 to 0.1 
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QUESTION
If e = 1, it indicates: 

  1. The impact is plastic 
  2. The impact is elastic 
  3. The impact is neither elastic nor plastic 
  4. none of the above 
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QUESTION
If e = 0, it indicates: 

  1. The impact is plastic 
  2. The impact is elastic 
  3. The impact is neither elastic nor plastic 
  4. none of the above 
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QUESTION
In case of Elastic impact: 

  1. Momentum is only conserved 
  2. Energy is only conserved 
  3. Neither momentum nor Energy is conserved 
  4. Both momentum and energy is conserved. 
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QUESTION
Two bodies with same mass are moving with the velocities 20 m/s & 15 m/s respectively before impact and 12 m/s & 15 m/s respectively after impact, determine the value of e. 

  1. 0.5 
  2. 0.66 
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QUESTION
What is unit of Impulse? 

  1. N-m 
  2. Joule 
  3. N m/s 
  4. Ns 
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QUESTION
Momentum is defined as the product of ------ 

  1. Mass & time 
  2. Mass & distance 
  3. Mass & acceleration 
  4. Mass & velocity 
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QUESTION
A Ball of mass 10 g falls from a height of 5m. It rebounds from a ground to 4 m. The coefficient of restitution ‘e’ is 

  1. √4/5 
  2. √5/4 
  3. 4/5 
  4. 5/4 
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QUESTION
The momentum of a system of two bodies is conserved 

  1. if either body does not exerts a force on the other 
  2. Under all circumstances 
  3. When there is no external force acting on body 
  4. When external force act only on one body 
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QUESTION
If a body hits the ground from a height h1 and rebounds to a height h2 after having inelastic collision with the ground then the coefficient of restitution is 

  1. e = h2/h1 
  2. e = h1/h2 
  3. e =√h2/h1 
  4. e = √ h1/h2 
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QUESTION
A body hits the ground with 50 m/s velocity and has inelastic collision with the ground then with what velocity it will rebound if the coefficient of restitution is 0.2 

  1. 1/250 m/s 
  2. 250 m/s 
  3. 1/10 m/s 
  4. 10 m/s 
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QUESTION
Central impact of two bodies 

  1. Can only be direct impact 
  2. Must always be elastic impact 
  3. May either be direct or indirect 
  4. None of the above 
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QUESTION
The coefficient of restitution is defined on the basis of ----- 

  1. Velocity components along the line of impact only 
  2. Velocity components normal to the line of impact 
  3. Velocity vectors before and after collision 
  4. None of the above 
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QUESTION
For a perfectly plastic central impact 

  1. The entire kinetic energy of the two bodies must be lost 
  2. The two bodies must move stuck together, whether the impact is direct or indirect 
  3. The two bodies must move stuck together only if the impact is direct 
  4. A body initial at rest, should stay at rest 
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QUESTION
50 gm glass marbles dropped from a height of 10 m rebounds to height of 7 m calculate impulse? 

  1. 2.185 Ns 
  2. 6.285 Ns 
  3. 8.125 Ns 
  4. None of the Above 
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QUESTION
A sphere of mass ‘m’ moving with a speed of ‘u’ strikes a sphere of same mass at rest. If after striking, the two spheres exchange their velocities then determine the coefficient of restitution. 

  1. 1/2 
  2. None of these 
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QUESTION
The impulse-momentum principle is applicable 

  1. If there is no external force acting on the body 
  2. When the momentum is conserved 
  3. Only when body hits another body 
  4. Whenever Newton’s law is applicable 
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QUESTION
When two bodies collide without the presence of any other forces or force fields, 

  1. Their total momentum must be conserved 
  2. Their total kinetic energy must be conserved 
  3. The collision must be direct 
  4. The collision must be central 
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QUESTION
If a body of mass 2 kg is at rest and is hit by a mass of 4 kg moving with 3 m/s, the fraction of the momentum retained by the moving body assuming the collision to be elastic and head on is 

  1. 1/2 
  2. 1/3 
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QUESTION
If mass of moving body is much greater than the mass of the body at rest then the approximate velocity of the moving body after head on collision is 

  1. Same and in same direction 
  2. Same and in apposite direction 
  3. Different and in same direction 
  4. Different and in opposite direction 
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QUESTION
The ball of mass 10 gm is dropped on the ground from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in the contact with ground for 0.01 s, then which statement is correct? 

  1. Impulse force between the ground and the ball is 15 N 
  2. Impulse force between the ground and the ball is 5 √2 N 
  3. Coefficient of restitution between the ground and ball is &frac14; 
  4. Coefficient of restitution between the ground and ball is &frac12; 
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QUESTION
A ball hits the floor and rebounds after an inelastic collision. In this case: 

  1. The momentum of the ball just after the collision is the same as that just before the collision. 
  2. The mechanical energy of the ball remains the same in the collision. 
  3. The total momentum of the ball and the earth is conserved. 
  4. The total energy of the ball and the earth is conserved. 
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QUESTION
A body of mass 2 kg moving with a velocity of 3 m/s collides head –on with a body of mass 1 kg moving with a velocity of 4 m/s. After collision the two bodies stick together and move with a common velocity which in the units m/s is equal to: 

  1. 1/3 
  2. 2/3 
  3. 1/4 
  4. 5/4 
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QUESTION
A body of mass ‘m’ collides against a wall with the velocity ‘v’ and rebounds with the same speed. Its change of momentum is: 

  1. 2 mv 
  2. mv 
  3. –mv 
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QUESTION
A ball is droped from a height h1 = 1 m on a smooth floor. Knowing that the height of first bounce h2 = 0.81 m, determine the coefficient of restitution. 

  1. 0.9 m 
  2. 1. 11 m 
  3. None of the Above 
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QUESTION
A ball is thrown upwards with an initial velocity of v0. Determine the time taken for the ball to reach the maximum height. Use the impulse –momentum method. 

  1. t = v0/g 
  2. t = 2v0/g 
  3. t = v0/2g 
  4. t = g/v0 
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QUESTION
A rifle of 5 kg mass fires a bullet of 10 gm mass at a velocity of 300 m/s. Determine the velocity with which the rifle recoils. 

  1. 0.1 m/s 
  2. 0.3 m/s 
  3. 0.6 m/s 
  4. 0.9 m/s 
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QUESTION
A boy of 50 kg mass runs with a velocity of 5 m/s and jumps into a boat of mass 75 kg. Find the velocity with which the boy and the boat will move together if the boat was initially at rest. 

  1. 1 m/s 
  2. 3 m/s 
  3. 4 m/s 
  4. 2 m/s 
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QUESTION
15 mg box car A is coasting freely at 1. 5 m/s on the horizontal track when it encounters a tank car B having a mass of 12 mg and coasting at 0.75 m /s towards it. If cars meet and coupled together, determine the speed of both cars just after the coupling. 

  1. 0.5 m/ s 
  2. 5.0 m/ s 
  3. 1. 0 m/ s 
  4. None of the Above 
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QUESTION
An 1800 kg car stopped at traffic light is struck from the rear by a 900 kg car and the two become entangled. If the smaller car was moving at 20 m/s before collision, what is the speed of the entangled cars after collision? 

  1. 7.98 m/s 
  2. 6.67 m/s 
  3. 7.66 m/s 
  4. 8.67 m/s 
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QUESTION
A 5.00 kg particle has a velocity of (3.00 i – 4.00j) m /s. Find its x and y components of momentum. 

  1. (15.00i – 20.00j) 
  2. (20.00i -15.00j) 
  3. (25.00i -10.00j) 
  4. (20.00i -20.00j) 
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QUESTION
A steel ball of weight 0.01 N falls from a height 6 m and rebounds to a height of 4 m find the impulse. 

  1. 0.2300 Ns 
  2. 0.1962 Ns 
  3. 0.3200Ns 
  4. 0.9182 Ns 
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QUESTION
In an impact testing machine a hammer of mass 10.5 kg is attached to a 1. 5 m long lever. The lever is held in horizontal position and is released. The hammer strikes the test piece and breaks it. Determine the velocity of hammer at impact. 

  1. 5.425 m/s 
  2. 4.525 m/s 
  3. 5.245 m/s 
  4. None of the Above 
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QUESTION
A man weighing 700 N is in boat weighing 3000 N which is floating in a still lake if the man starts running along the length of boat at a speed of 5 m/s with respect to the boat. Find the velocity of boat. Neglect resistance to the motion. 

  1. - 0.9459 m/s 
  2. – 0.9999 m/s 
  3. - 1. 02 m/s 
  4. -1. 1111m/s 
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QUESTION
A man weighing 700 N is in boat weighing 3000 N which is floating in a still lake if he jumps of the boat with an absolute velocity of 8 m/s find the velocity of the boat. 

  1. – 1. 68 m/s 
  2. – 6.18 m/s 
  3. - 1. 86 m/s 
  4. – 8.18 m/s 
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QUESTION
Rail road car A of mass 15 Mg is traveling at 2 m/s on a horizontal track. Car B of mass 13 Mg is traveling towards A at 0.8 m/s. If the car meet and couple together find the speed of the coupled cars just after the coupling. 

  1. 0.5 m/s 
  2. 7.0 m/s 
  3. 0.7m/s 
  4. 70 m/s 
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QUESTION
What is Impulse Momentum Principle? 

  1. Change in K.E. = Work done 
  2. Impulse of a force system = Change in momentum 
  3. Change in Impulsive force = Change in K.E. 
  4. Change in P.E. = Change in Kinetic Energy 
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QUESTION
A 5 kg body is moving with a constant acceleration of 2 m/s2 starting from rest. Determine the change in momentum in 2 s. 

  1. 20 Ns 
  2. 40 Ns 
  3. 10 Ns 
  4. 0 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 2 m/s2 starting from rest. Determine the change in momentum in 3 s. 

  1. 20 Ns 
  2. 40 Ns 
  3. 30 Ns 
  4. 0 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 2 m/s2 starting from rest. Determine the change in momentum in 4 s. 

  1. 20 Ns 
  2. 40 Ns 
  3. 30 Ns 
  4. 0 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 2 m/s2 starting from rest. Determine the change in momentum in 5 s. 

  1. 20 Ns 
  2. 40 Ns 
  3. 30 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 3 m/s2 starting from rest. Determine the change in momentum in 2 s. 

  1. 20 Ns 
  2. 40 Ns 
  3. 30 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 3 m/s2 starting from rest. Determine the change in momentum in 3 s. 

  1. 20 Ns 
  2. 45 Ns 
  3. 30 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 3 m/s2 starting from rest. Determine the change in momentum in 4 s. 

  1. 60 Ns 
  2. 45 Ns 
  3. 30 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 3 m/s2 starting from rest. Determine the change in momentum in 5 s. 

  1. 60 Ns 
  2. 45 Ns 
  3. 75 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 4 m/s2 starting from rest. Determine the change in momentum in 2 s. 

  1. 40 Ns 
  2. 45 Ns 
  3. 75 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 4 m/s2 starting from rest. Determine the change in momentum in 3 s. 

  1. 40 Ns 
  2. 45 Ns 
  3. 75 Ns 
  4. 60 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 4 m/s2 starting from rest. Determine the change in momentum in 4 s. 

  1. 40 Ns 
  2. 80 Ns 
  3. 75 Ns 
  4. 60 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 4 m/s2 starting from rest. Determine the change in momentum in 5 s. 

  1. 60 Ns 
  2. 80 Ns 
  3. 100 Ns 
  4. 60 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 5 m/s2 starting from rest. Determine the change in momentum in 2 s. 

  1. 60 Ns 
  2. 80 Ns 
  3. 100 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 5 m/s2 starting from rest. Determine the change in momentum in 3 s. 

  1. 60 Ns 
  2. 75 Ns 
  3. 100 Ns 
  4. 50 Ns 
Unknown macro: showhide.

QUESTION
A 5 kg body is moving with a constant acceleration of 5 m/s2 starting from rest. Determine the change in momentum in 4 s. 

  1. 60 Ns 
  2. 75 Ns 
  3. 100 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 5 m/s2 starting from rest. Determine the change in momentum in 5 s. 

  1. 125 Ns 
  2. 75 Ns 
  3. 100 Ns 
  4. 50 Ns 
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QUESTION
A 5 kg body is moving with a constant acceleration of 5 m/s2 starting from rest. Determine the change in momentum in 1 s. 

  1. 25 Ns 
  2. 75 Ns 
  3. 100 Ns 
  4. 50 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 2 s. 

  1. 50 Ns 
  2. 25 Ns 
  3. 75 Ns 
  4. 100 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 3 s. 

  1. 50 Ns 
  2. 150 Ns 
  3. 75 Ns 
  4. 100 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 4 s. 

  1. 50 Ns 
  2. 150 Ns 
  3. 200 Ns 
  4. 100 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 5 s. 

  1. 50 Ns 
  2. 250 Ns 
  3. 200 Ns 
  4. 100 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 2 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 1 s. 

  1. 50 Ns 
  2. 250 Ns 
  3. 20 Ns 
  4. 100 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 2 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 2 s. 

  1. 50 Ns 
  2. 40 Ns 
  3. 20 Ns 
  4. 100 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 2 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 3 s. 

  1. 50 Ns 
  2. 40 Ns 
  3. 20 Ns 
  4. 60 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 2 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 4 s. 

  1. 50 Ns 
  2. 40 Ns 
  3. 80 Ns 
  4. 60 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 2 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 5 s. 

  1. 100 Ns 
  2. 40 Ns 
  3. 80 Ns 
  4. 60 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 3 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 1 s. 

  1. 30 Ns 
  2. 100 Ns 
  3. 50 Ns 
  4. 0 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 3 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 2 s. 

  1. 150 Ns 
  2. 100 Ns 
  3. 60 Ns 
  4. 0 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 3 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 3 s. 

  1. 150 Ns 
  2. 100 Ns 
  3. 60 Ns 
  4. 90 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 3 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 4 s. 

  1. 120 Ns 
  2. 100 Ns 
  3. 60 Ns 
  4. 90 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 3 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 5 s. 

  1. 120 Ns 
  2. 100 Ns 
  3. 150 Ns 
  4. 90 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 4 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 1 s. 

  1. 120 Ns 
  2. 100 Ns 
  3. 150 Ns 
  4. 40 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 4 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 2 s. 

  1. 120 Ns 
  2. 80 Ns 
  3. 150 Ns 
  4. 40 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 4 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 3 s. 

  1. 120 Ns 
  2. 80 Ns 
  3. 150 Ns 
  4. 40 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 4 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 4 s. 

  1. 120 Ns 
  2. 80 Ns 
  3. 150 Ns 
  4. 160 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 4 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 5 s. 

  1. 200 Ns 
  2. 80 Ns 
  3. 150 Ns 
  4. 160 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 1 s. 

  1. 200 Ns 
  2. 80 Ns 
  3. 50 Ns 
  4. 160 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 2 s. 

  1. 100 Ns 
  2. 80 Ns 
  3. 50 Ns 
  4. 160 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 4 s. 

  1. 100 Ns 
  2. 200 Ns 
  3. 50 Ns 
  4. 150 Ns 
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QUESTION
A 12.5 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 4 s. 

  1. 100 Ns 
  2. 200 Ns 
  3. 50 Ns 
  4. 250 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 3 s. 

  1. 50 Ns 
  2. 150 Ns 
  3. 75 Ns 
  4. 100 Ns 
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QUESTION
A 10 kg body is moving with a constant acceleration of 5 m/s2. If initial velocity of the body is 2 m/s, determine the change in momentum in 6 s. 

  1. 100 Ns 
  2. 300 Ns 
  3. 50 Ns 
  4. 250 Ns 
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QUESTION
A 50 N force is applied to a 10 kg body for 5 s. Determine the change in momentum. 

  1. 2.5 Ns 
  2. 8 Ns 
  3. 250 Ns 
  4. 5 Ns 
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QUESTION
A 50 N force is applied to a 10 kg body for 2 s. Determine the change in momentum. 

  1. 25 Ns 
  2. 100 Ns 
  3. 250 Ns 
  4. 50 Ns 
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QUESTION
A 50 N force is applied to a 10 kg body for 3 s. Determine the change in momentum. 

  1. 25 Ns 
  2. 100 Ns 
  3. 150 Ns 
  4. 50 Ns 
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QUESTION
A 50 N force is applied to a 10 kg body for 4 s. Determine the change in momentum. 

  1. 25 Ns 
  2. 200 Ns 
  3. 150 Ns 
  4. 50 Ns 
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QUESTION
A 50 N force is applied to a 10 kg body for 5 s. determine the change in momentum. 

  1. 25 Ns 
  2. 200 Ns 
  3. 150 Ns 
  4. 250 Ns 
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QUESTION
A 100 N force is applied to a 10 kg body for 5 s. Determine the change in momentum. 

  1. 500 Ns 
  2. 300 Ns 
  3. 200 Ns 
  4. 100 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a 10 kg body for 4 s. Determine the change in momentum. 

  1. 500 Ns 
  2. 300 Ns 
  3. 400 Ns 
  4. 100 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a 10 kg body for 3 s. Determine the change in momentum. 

  1. 500 Ns 
  2. 300 Ns 
  3. 400 Ns 
  4. 100 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a 10 kg body for 2 s. Determine the change in momentum. 

  1. 500 Ns 
  2. 300 Ns 
  3. 400 Ns 
  4. 200 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a 10 kg body for 1 s. Determine the change in momentum. 

  1. 500 Ns 
  2. 100 Ns 
  3. 400 Ns 
  4. 200 Ns 
Unknown macro: showhide.

QUESTION
A 100 N force is applied to a 10 kg body for 6 s. Determine the change in momentum. 

  1. 600 Ns 
  2. 100 Ns 
  3. 400 Ns 
  4. 200 Ns 
Unknown macro: showhide.

QUESTION
Two men are standing on a floating boat with a velocity of 4.2 m/s. The mass of each man is 80 kg and that of boat is 400 kg. If the boat was initially at rest, find final velocity of boat by using principle of conservation of momentum. Neglect the water friction. 

  1. -1. 55 m/s 
  2. -1. 60 m/s 
  3. -1. 68 m/s 
  4. -1. 70 m/s 
Unknown macro: showhide.

References

  • Questions by Prof. AmitKumar Holi, SKNCOE, Pune
  • WikiNote Foundation 

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Created by Vishal E on 2019/02/15 15:54
    
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