Question 10
Work, Energy and PowerA stone of mass m kg is held h meters above the floor for 50 s. The work done in joules over this period is
- A.mh
- B.mgh
- C.mgh/50
- D.0
Show the answer and explanation
Answer: D (0)
Explanation
Work needs movement in the direction of the force. The stone does not move, so no work is done.