1. If a falling ball were to make a
perfectly elastic collision with the floor, would it rebound to its original
2. A boy stands on the back of a rowboat
and dives into the water. What happens to the rowboat as the boy leaves it?
3. The speed of a tennis ball on the return
of a serve can be just as fast as the serve, even though the racket isnt swung
very fast. How can this be?