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