A constant horizontal force of 275 N was applied to push a crate of mass

Question

m = 92.0 kg at a speed of v = 0.850 m/s, which encounters a rough horizontal
surface of length, l = 0.65 m as in Figure 2 below. If the coefficient of kinetic
friction between the crate and rough surface is 0.358, 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, and
(c) The speed of the crate when it reaches the end of the rough surface.