A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.870 m/s encounters

Question

A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.870 m/s encounters a rough horizontal surface of length script l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.360 and he exerts a constant horizontal force of 290 N on the crate, find the following. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude N direction (b) Find the net work done on the crate while it is on the rough surface. J (c) Find the speed of the crate when it reaches the end of the rough surface.

Explanation / Answer

umg = .36 *92*9.8 = 324.57 so less that 290 so the box will not move 0

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