Kinetic and potential energy and work–energy theorem - Question Bank
1. Which quantity is conserved when a body moves under a conservative force and no external forces act on it?
2. The work done by a non-conservative force like friction:
3. A 5 kg object is moving with a velocity of 2 m/s. If its velocity increases to 4 m/s, the change in its kinetic energy is:
4. If a force does negative work on an object, the object's kinetic energy:
5. The work done by gravity when an object falls from height h to the ground is:
6. A 2 kg object is at rest. A net force of 4 N acts on it for 3 seconds. What is its kinetic energy at the end of 3 seconds?
7. If an object's kinetic energy is K, and its mass is m, what is its momentum p?
8. The work-energy theorem is particularly useful for problems involving:
9. Kinetic energy is a form of energy associated with:
10. Potential energy is a form of energy associated with:
11. A 0.5 kg object is moving at 10 m/s. If a force does 20 J of work on it, its new velocity will be approximately:
12. Which of the following statements is true about work done?
13. If a force is applied at an angle θ to the direction of displacement, the work done is:
14. The potential energy of a spring is given by:
15. If the mass of an object is doubled and its velocity is halved, its kinetic energy will be:
16. What is the work done by the centripetal force in circular motion?
17. When a body falls freely under gravity, its total mechanical energy:
18. A 10 kg object is at a height of 5 m. Its potential energy is (g = 10 m/s^2):
19. What is the change in potential energy when an object of mass 'm' is raised from height h1 to h2?
20. A force of 5 N acts on a particle of mass 1 kg. If the particle starts from rest, its kinetic energy after 10 seconds will be:
21. If the speed of an object decreases, its kinetic energy:
22. The work-energy theorem is a direct consequence of:
23. Which of the following is an example of kinetic energy?
24. Which of the following is an example of potential energy?
25. A car of mass 1000 kg is moving at 20 m/s. If brakes are applied and it stops, the work done by the braking force is:
26. The work done by friction is always:
27. A spring is compressed by 0.1 m. If the spring constant is 200 N/m, the potential energy stored is:
28. A block of mass 5 kg is lifted vertically by 3 meters. The work done against gravity is:
29. If an object's kinetic energy is 100 J and its mass is 2 kg, what is its velocity?
30. A 2 kg object moves with a velocity of 4 m/s. Its kinetic energy is:
31. In the absence of non-conservative forces, the total mechanical energy (Kinetic Energy + Potential Energy) of a system is:
32. When the ball in the previous question hits the ground, its potential energy is:
33. A ball of mass 'm' is dropped from a height 'h'. Its potential energy at height 'h' is:
34. What is the potential energy of an object at the ground level (reference point)?
35. When is the work done by a force zero?
36. If a force of 10 N acts on an object and displaces it by 5 meters in the direction of the force, the work done is:
37. The work done by a force F acting on an object that undergoes a displacement d is given by:
38. A body is moving with a constant velocity. The net work done on it is:
39. If the net work done on an object is negative, its kinetic energy:
40. If the net work done on an object is positive, its kinetic energy:
41. The work-energy theorem states that the net work done on an object is equal to the change in its:
42. A spring has potential energy stored in it when it is:
43. Gravitational potential energy near the Earth's surface is given by:
44. Potential energy is the energy possessed by an object due to its:
45. If the velocity of an object is doubled, its kinetic energy will be:
46. The formula for kinetic energy (KE) is:
47. Kinetic energy is defined as the energy possessed by an object due to its:
48. The work done by a conservative force is:
49. Which of the following is a scalar quantity?
50. What is the SI unit of work?