My question is Atennis player receives a shot with the ball (0.06 kg) traveling horizontally at 50 m/s and returns the shot with the ball traveling the opposite direction at 40 m/s (a) What is the impulse delivered to the ball by the racquet? (b) What work does th racquet do on the ball? Ok I have done a force diagram but I can't figure out the forumla for (a) but on (b) The work done on the ball would be the change in velosity squared times half of the weight of the ball. Because of the Kentic engery therom. Right?