A uniform plank the length of 61 m weight of 445 n rests on, Physics

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A uniform plank the length of 61 m weight of 445 n rests on

A uniform plank the length of 6.1 m, weight of 445 N rests on the ground and a frictionless roller at the top of a wall 3.05 m high. The plank is in equilibrium at any value of θ greater than or equal to 70 degrees but slips if θ is < 70 degrees. Discover the coefficient of friction among the plank and the ground. Utilize the point of origin for forces about the point where the ground and the plank meet.

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Physics: A uniform plank the length of 61 m weight of 445 n rests on

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