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प्रश्न
In the following case, work is done or not done and why?
A porter carrying load on his head and walking along level road.
लघु उत्तरीय
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उत्तर
No work is done on the load against gravity. The porter’s supporting force on the load is upward, while the load’s displacement is horizontal; these directions are perpendicular. Therefore, the work done by this force is zero.
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