A boy pushes the wall in the class for five minutes but the wall does not move. Another boy pushes the chair from front to the back side of the class. In which case, more work is done.
Q. A boy pushes the wall in the class for five minutes but the wall does not move. Another boy pushes the chair from front to the back side of the class. In which case, more work is done.
Ans. The work done by first boy is zero as there is no displacement of the wall. In second case, work is done on the chair as it is displaced through a certain distance.
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