physics

The weightless strut in the figure below is not attached to the wall; it is prevented from falling only by friction. (Let w = 360 N, L = 5.25 m and h = 3.25 m.)

(a) Find the magnitude of the force of friction between the wall and the strut.




(b) Find the normal force exerted by the wall on the strut.




(c) Find the minimum coefficient of static friction.

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