Question

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

M g * Us

How big is that?
No
A stubborn 100 kg mule sit down and refuse to move. To drag the mule the barn the exasperated former ties a rope around the mule and pulls with maximum force of 850 N the coefficient friction between mule and ground is o. 8 and k is 0.55
Is former able to move the mule?

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