A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 54.6 m/s and returns the shot with the ball traveling horizontally at 38.8 m/s in the opposite direction. (Take the direction of the ball's final velocity (toward the net) to be the +x-direction.)

(a) What is the impulse delivered to the ball by the racket?

Magnitude? and direction?

(b) What work does the racket do on the ball? (Indicate the direction with the sign of your answer.)