Block A (mass 40.0 kg) and block B (mass 80.0 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is k = 0.300 and the blocks are released from rest, determine the change in the kinetic energy of block A as it moves from C to D, a distance of 14.0 m up the incline.