Question

Why is work done by tension in pulley system zero ?

Answer 1

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Net work done by tension of an ideal thread on its adjoining bodies is always zero. Ideal thread means it is massless and inextensible. So for such a thread, tension at each and every point of the thread would be same.

Answer 2

Explanation:

Net work done by tension of an ideal thread in the next its adjoining bodies week us always zero Ideal thread means it is massless and inextensible So for such a thread, tension at each and every point of the thread would be same..