A block, M = 5 kg starts from rest and moves down the inclined plane making angle ? = 37O with the horizontal. The kinetic friction force acting on the block is, fk = 10 N, see the figure. Draw the free body diagram and find the acceleration of the block and the coefficient of kinetic friction ?k between the block and the inclined surface (cos37O = 0.8, sin37O = 0.6, g = 10 m/s2).