Answers

2015-05-13T13:54:27+05:30
When a force is applied on a object and it displaced its position from initial point.Then we say that work is done.
If its position doesn't changed, we can say that the work is not done in this case.
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2015-05-13T14:04:41+05:30
We say work is done when energy is released and displacement of body is seen

Hope this answer satisfies you.........



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