The 20-lb cart B is supported on rollers of negligible size. If a 10-lb suitcase A is th...

The 20-lb cart B is supported on rollers of negligible size. If a 10-lb suitcase A is thrown horizontally onto the cart at 10 ft/s when it is at rest, determine the length of time that A slides relative to B, and the final velocity of A and B. The coefficient of kinetic friction between A and B is = 0.4.