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Question

A person holds a bundle of hay over his head for 30minutes and gets tired. Has he done some work or not? Justify your answer.


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Solution

  1. For work to be done, the conditions necessary are, force applied and displacement caused by it.
  2. Since the person is standing with the bundle of hay on his head, displacement is not caused in any direction.

Hence, the work done by the person is zero.


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