A coolie is walking on a railway platform with a load of 30 kg on his head. How much work is done by coolie?
A coolie is walking on a railway platform with a load of 30 kg on his head. How much work is done by coolie?
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Coolie is carrying a load on his head so force exerted by it under gravity and displacement of the load makes 900 angle.
W = 0 [ ∵ Force is perpendicular to the displacement ]
Therefore, Work done by the coolie is zero.
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