The mass of a regulation tennis ball is 52.0g (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 26.0m/s} . (This number can also vary, depending on the racket and swing.) We shall assume a 26.0m/s contact time throughout this problem. The fastest-known served tennis ball was served by "Big Bill" Tilden in 1931, and its speed was measured to be 73.14 m/s}.

Part A: What impulse did Big Bill exert on the tennis ball in his record serve?

Part B: What force did Big Bill exert on the tennis ball in his record serve?

Part C: If Big Bill's opponent returned his serve with a speed of 56.0m/s , what force did he exert on the ball, assuming only horizontal motion?

Part D: If Big Bill's opponent returned his serve with a speed of 56.0m/s , what impulse did he exert on the ball, assuming only horizontal motion?