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A worker pulls a wagon along the horizontal surface. Weight of the wagon is 80N...

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Physics

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A worker pulls a wagon along the horizontal surface. Weight of the wagon is 80N and the worker exerts 90N force at an angle of 20 above the horizontal for a distance of 12.0 m.a) How much work is done by worker?b) How much work is done by the Normal force?c) How much work is done by friction force if the coefficient of kinetic friction is 0.20?

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