What is the potential energy of an object of mass 40 kg when it is lifted at a height of 5m above the ground?
A. 200W
B. 2000J
C. 2000W
D. 200J
Answer: Option B
A. 200W
B. 2000J
C. 2000W
D. 200J
Answer: Option B
Which of the following can do more work?
A. A raised hammer
B. A bullet fired by the gun
C. A moving stone
D. A rotating wheel
A. Energy released by a moving object
B. Energy emitted during mechanical work
C. The sum of the kinetic energy and potential energy of an object
D. Equal to the rate of work done
A. Chemical energy
B. Potential energy
C. Kinetic energy
D. Heat energy
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