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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. \(\frac{mgh}{50}\)
  • D. O
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Correct Answer: Option D
Explanation
work = mgh(no motion)
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