a man holds a sack of rice on his head for 30 minutes and gates tired. has he done any work?explain your answer with reasons.
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No he has not done any work. According to the scientific definition of work...work is said to be done only when a force is applied and the object gets displaced but here in this case the object has not displaced ...no matter that whether a person holds the rice sack over his head for 30 minutes or even an hour he has not done any work .
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