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Class 11 Physics Practice Test: Work, Energy and Power - Work-Energy Theorem
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The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy.

Class 11 Physics Practice Test: Work, Energy and Power - Work-Energy Theorem
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10 Questions

1. A body moving with a constant velocity on normal ground initially has an energy of 1000 J. If the final energy is 800 J, what is the work done and which force causes this work?
2. A body having 7 kg of mass moves slowly and covers a vertical height of 14 m. What is the work done in Joules and what force causes this work? Take g = 10 m/s2.
3. A body having 7 kg of mass moves with a velocity of 20 m/s covers a vertical height of 8.75 m. What is the work done by the moving force in Joules? Take g = 10 m/s2.
4. The total energy change of a body which covers a vertical height is constituted completely by the potential energy change only when ______
5. According to the work-energy theorem, total change in energy is equal to the _______
6. The change in the total energy of a body moving because of work being done on it is attributed by the change in kinetic energy only when ______
7. A body of mass 2 Kg, initially at rest, moves under the influence of an external force of magnitude 4 N on plane ground. What is the work done by the force and the change in kinetic energy in the first 10 seconds?
8. A body moving with a constant velocity on normal ground initially has an energy of 1000 J. If the final energy is 800 J, what is the work done and which force causes this work?
9. The work done by a body while covering a vertical height of 5m is 50 kJ. By how much amount has the energy of the body changed?
10. A body having 7 kg of mass moves with a velocity of 20 m/s covers a vertical height of 8.75 m. What is the work done by the moving force in Joules? Take g = 10 m/s2.

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