A stone of mass m kg is held h meters above the floor for 50s....
PHYSICS
JAMB 1990
A stone of mass m kg is held h meters above the floor for 50s. The work done in joules over this period is
- A. mh
- B. mgh
- C. mgh/50
- D. O
Correct Answer: D. O
Explanation
work = mgh(no motion)
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