(a) A baseball weighs 5.13 oz. What is the kinetic energy in joules of this baseball when it is thrown by a major-league pitcher at 95.0 mph?
(b) By what factor will the kinetic energy change if the speed of the baseball is decreased to 55.0 mph?
(c) What happens to the kinetic energy when the baseball is caught by the catcher?
(d) What careful experimental measurement could (in principle) be made to confirm your answer to (c)?