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A Stubborn, 120 kg mule sits down and refuses to move. To drag the mule to the barn, the exasperated farmer ties a rope around the pulls with his maximum force of 800N. The coefficients of friction between the mule and the ground are Us=0.8 and Uk=0.5. Is the farmer able to move the mule?

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    He can move the mule if he can overcome the static friction force

    M g * Us

    How big is that?

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