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Q: Work is done on a body only when –
  • A. It experiences energy gain through a mechanical effect
  • B. Forces work on it
  • C. There is displacement
  • D. It moves through a certain distance
Correct Answer: Option A - Work is done on a body only when it experiences energy gain through a mechanical effect.
A. Work is done on a body only when it experiences energy gain through a mechanical effect.

Explanations:

Work is done on a body only when it experiences energy gain through a mechanical effect.