1. A squash ball hits a wall at a 45° angle
as shown in Fig. 9-36. What is the direction (a) of the change in momentum of
the ball, (b) of the force on the wall?
2. Why can a batter hit a pitched baseball
farther than a ball he himself has tossed up in the air?
3. Describe a collision in which all
kinetic energy is lost.