38. In a tennis match a player wins a point by hitting the 0.059-kg ball sharply to the ground on the opponent's side of the net. If the ball bounces upward from the ground with a speed of 16 m/s and is caught by a fan in the stands when it has a speed of 12 m/s, how high above the court is the fan? Ignore air resistance. 39. A crow drops a 0.11-kg clam onto a rocky beach from a height of 9.8 m. What is the kinetic energy of the clam when it is 5.0 m above the ground? What is its speed at that point