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Vanshya
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Asked: 2021-02-13T04:33:24+00:00 In:

How much work is done by a coolie walking on a horizontal platform with a load on his head ? Explain.

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NCERT Solutions for Class 11 Science Work energy and power 4
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Work energy and power
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2020-2021cbsechapter 4class 11class 11 sciencencertphysicssciencework energy and power
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    1 Answer

    1. W = 0 as his displacement is along the horizontal direction and in order to balance the load on his head, he applies a force on it in the upward direction equal to its weight. Thus angle between force and displacement is zero.

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