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CBSE Class 11-science Answered

Why a coolie does no work when he moves on a level road while carrying a box on his head?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

Work done is given by:

The coolie applies force at right angle to the displacement. Therefore,
Hence,
Answered by | 04 Jun, 2014, 03:23: PM
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