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A person holds a bundle of hay over his head for 30 minutes an... - Science
Question
A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.
Answer
No, he has not done any work.
Justification:
Work is defined as Force \times Displacement. Although the person applies an upward force to hold the bundle, there is no displacement of the bundle (s = 0). Therefore, the work done (W = F \times 0) is zero.
