(Solved): '15-40. The 20-lb suitcase \( A \) is released from rest at \( C \). After it slides down the smoot ...

'15-40. The 20-lb suitcase \( A \) is released from rest at \( C \). After it slides down the smooth ramp it strikes the \( 10-1 \mathrm{~b} \) suitcase \( B \), which is originally at rest. If the coefficient of restitution between the suitcases is \( e=0.3 \) and the coefficient of kinetic friction between the floor \( D E \) and each suitcase is \( \mu=0.4 \), determine (a) the velocity of \( A \) just before impact, (b) the velocities of \( A \) and \( B \) just after impact, and (c) the distance \( B \) slides before coming to rest.