Work, Energy and Power questions
712 published questions with worked solutions.
- The kinetic energy of a light body and a heavy body is same. Which one of the following statements is CORRECT?
- A force of F=2x^2-x+4 acts on a body of mass 3 kg and displaces it from x = 0 to x = 3m. The work done by the force is [MHT-CET...
- What is the amount of work done by a person when (i) he holds a mass of 2 kg for 5 second and (ii) he lifts the same mass through...
- Work done in sliding a 1 kg block up a rough inclined plane of height 5 m is 100 J. Work done against the friction is (g = 10...
- A force F=(10+0.5x) N acts on a particle in the x-direction. The work done by the force in displacing the particle from x = 0 to...
- A body of mass 'M' begins to move under the action of time dependent force F=(t i+2t^2 j) N where i and j are unit vectors along...
- A block of mass 'm' moving on a frictionless horizontal surface collides with a spring of spring constant 'K' and compresses it...
- A block of mass ‘m’, kept on a horizontal surface, is moved through a distances by applying a horizontal force (F) to it. What is...
- The kinetic energy acquired by a body of mass ‘M’ in travelling a certain distance ‘d’, starting from rest, under the action of...
- A spring of spring constant ‘k’ is compressed through ‘x’ cm and is used to push a metal ball of mass ‘m’. The velocity with...
- A sphere of mass 25 gram is placed on a vertical spring. It is compressed by 0.2 m using a force 5 N. When the spring is...
- The kinetic energy of a light body and a heavy body is same. Which one of them has greater momentum? [MHTCET 2023]
- A gardener pushes a lawn roller through a distance 20 m. If he applies a force of 30 kg-wt in a direction inclined at 60^0 to the...
- When the momentum of molecules of a gas increases by 20% the percentage increase in the kinetic energy of the molecules will be
- Heat required to melt 1 gm ice at 0°C is 80 cal. A man chews 60 gm of ice and melts in one minute. His power is
- The weight of a person is 60 kg, if he gets 10^5 calories heat through food and the efficiency of his body is 25% then up to how...
- If two springs S_1 and S_2 of force constants k_1 and k_2, respectively, are stretched by the same force, it is found that more...
- If a spring extends by x on loading, then energy stored by the spring is (if T is the tension in the spring and k is the spring...
- A block of mass 16 kg moving with velocity 4 m/s on a frictionless surface compresses an ideal spring and comes to rest. If force...
- Two springs of spring constants 'K' and '2K' are stretched by same force. If 'w_1' and 'w_2' are the energies stored in them...
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