A cookie is walking on the planet form with 30kg load on his head. How much work is done by the cookie?
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Answer:
Work done against gravity is zero as there is no displacement along or opposite to the direction of force of gravity.
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Explanation:
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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