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Question

A load of 100 kg is pulled up by 5 m. Calculate the work done. (g = 9.8 m/s2)

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Solution

Mass of the body (m) = 100 kg
Height by which the body is lifted (h) = 5 m
Work done in lifting a body = (Weight of body) (Vertical distance)
So, W = (m) (g) (h)
Therefore,
(W) = (100)(9.8)(5) J = 4900 J
So, the work done is 4900 J.

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