High-speed stroboscopic photographs show that the head of a 250. g golf club travels at 60.0 m/s just before it strikes a 47.0 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 48.0 m/s.
1) What is the velocity of the golf ball just after the impact by the club?
2) Is kinetic energy conserved during the collision? Justify your answer.