A person continues to push a rock for some time but fails to move it. What is the work done by him? If in case he succeeds in moving the rock by some distance, then what is his new work. Against which force is he doing this work?
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The force applied by the man is muscular force because he is using his body to push the rock
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in the first case there is no work done by the person but in the second case ther is work done against the frictional force
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