A 5.0kg block is held at rest against a vertical wall by ahorizontal force of 20

Question

A 5.0kg block is held at rest against a vertical wall by ahorizontal force of 200N. a) what is the magnitude of the frictional force needed toprevent the block from falling? b) what is the magnitude of the minimum horizontal forceneeded to prevent the block from falling if the coefficient ofstatic friction between the wall and the block is .25? A 5.0kg block is held at rest against a vertical wall by ahorizontal force of 200N. a) what is the magnitude of the frictional force needed toprevent the block from falling? b) what is the magnitude of the minimum horizontal forceneeded to prevent the block from falling if the coefficient ofstatic friction between the wall and the block is .25?

Explanation / Answer

m = 5.0 kg, = 0.25 a) f = mg = 49 N b) F = N = f/ = 196 N

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