Chapter - 4 Work and Energy

Q&A -Ask Doubts and Get Answers

Q
Work and Energy

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, the person has not done any work.

If a person holds a bundle of hay over his head gravitational force is acting on the hay downwards. But, there is no displacement in the bundle of hay in the direction of the force. Hence, no work is done.


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