Kinetic and Potential Energy – Subjective Questions
1. A body of mass \(5 \, \text{kg}\) is moving with a velocity of \(10 \, \text{m/s}\). Calculate its kinetic energy.
2. An object of mass \(8 \, \text{kg}\) is lifted to a height of \(12 \, \text{m}\). Find its potential energy. (Take \(g = 9.8 \, \text{m/s}^2\)).
3. A bullet of mass \(0.02 \, \text{kg}\) travels at \(200 \, \text{m/s}\). Calculate the kinetic energy possessed by the bullet.
4. A stone of mass \(2 \, \text{kg}\) is dropped from a height of \(15 \, \text{m}\). Find the potential energy at the top.
5. A motorbike of mass \(150 \, \text{kg}\) moves at \(20 \, \text{m/s}\). Calculate the kinetic energy.
6. A box of mass \(12 \, \text{kg}\) is raised to a shelf \(2 \, \text{m}\) high. Find its potential energy.
7. Calculate the speed of a \(4 \, \text{kg}\) object having kinetic energy of \(200 \, \text{J}\).
8. A body of mass \(3 \, \text{kg}\) is moving with a velocity of \(15 \, \text{m/s}\). Calculate its kinetic energy.
9. A person of mass \(60 \, \text{kg}\) climbs to a height of \(10 \, \text{m}\). Find the potential energy gained.
10. An arrow of mass \(0.05 \, \text{kg}\) is shot at \(40 \, \text{m/s}\). Calculate its kinetic energy.
11. A rock of mass \(20 \, \text{kg}\) rests on a hill \(25 \, \text{m}\) high. Calculate its potential energy.
12. Find the velocity of a \(2 \, \text{kg}\) object with kinetic energy \(100 \, \text{J}\).
13. A hammer of mass \(10 \, \text{kg}\) is raised \(5 \, \text{m}\) above the ground. Calculate its potential energy.
14. A car of mass \(800 \, \text{kg}\) is moving at \(30 \, \text{m/s}\). Calculate its kinetic energy.
15. A climber of mass \(70 \, \text{kg}\) is at a height of \(50 \, \text{m}\). Calculate the potential energy.
16. A stone of mass \(1.5 \, \text{kg}\) is thrown with velocity \(12 \, \text{m/s}\). Calculate its kinetic energy.
17. An object of mass \(6 \, \text{kg}\) is lifted through \(4 \, \text{m}\). Find its potential energy.
18. Calculate the kinetic energy of a train of mass \(5000 \, \text{kg}\) moving at \(10 \, \text{m/s}\).
19. A ball of mass \(0.5 \, \text{kg}\) is dropped from a height of \(18 \, \text{m}\). Calculate its potential energy.
20. Find the velocity of a \(10 \, \text{kg}\) body if its kinetic energy is \(400 \, \text{J}\).
21. A child of mass \(40 \, \text{kg}\) climbs a ladder \(8 \, \text{m}\) high. Calculate the potential energy gained.
22. A motorcar of mass \(1000 \, \text{kg}\) moves at a speed of \(25 \, \text{m/s}\). Calculate its kinetic energy.
23. A coconut of mass \(2.5 \, \text{kg}\) is at a height of \(12 \, \text{m}\). Find its potential energy.
24. Calculate the kinetic energy of a \(2 \, \text{kg}\) ball moving at \(8 \, \text{m/s}\).
25. A bag of rice of mass \(30 \, \text{kg}\) is raised \(3 \, \text{m}\) high. Find the potential energy.
26. A cyclist of mass \(60 \, \text{kg}\) rides at a speed of \(5 \, \text{m/s}\). Calculate the kinetic energy.
27. An object of mass \(1 \, \text{kg}\) has potential energy of \(49 \, \text{J}\). Calculate its height above the ground.
28. A bullet of mass \(10 \, \text{g}\) is fired at \(300 \, \text{m/s}\). Calculate the kinetic energy. (Note: \(1 \, \text{g} = 0.001 \, \text{kg}\)).
29. A mass of \(2 \, \text{kg}\) is lifted to a height where it gains \(98 \, \text{J}\) of potential energy. Calculate the height.
30. A football of mass \(0.4 \, \text{kg}\) rolls at a velocity of \(15 \, \text{m/s}\). Calculate its kinetic energy.
