a man pushing a crate of mass m=92kg at a speed of v=0.850m/s encounters a rough horizontal surface of length, 0.65m as in figure. if the coeffivient of kinetic friction between the crate and roug surface is 0.358 and he exerts a constant horizontal force of 275N on the crate, find: a) the magnitude and direction of the net force on the crate while it is on the rough surface. b) the net work done on the crate while it is on the rough surface. c) the peed of the crate when it reaches the end of the rough surface

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