An airline employee tosses two suitcases in rapid succession, with a horizontal velocity of 7.2 ft/s, onto a 50-lb baggage carrier which is initially at rest.

(a) Knowing that the final velocity of the baggage carrier is 3.6 ft/s and that the first suitcase the employee tosses onto the carrier has a weight of 30lb determine the weight of the other suitcase.

(b) What would be the final velocity of the carrier if the employee reversed the order in which he tosses the suitcases?