A 98.0 kg hockey player skating at 2.12 m/s 32° S of W is body checked by an 87.0 kg opponent who is skating at 1.40 m/s 42° N of E. They collide inelastically and stick together. What is the velocity of the pair immediately after the collision? (ans: 0.488 m/s 18.5°S of W).