A 57.0-g tennis ball is traveling straight at a player at 21.0 m/s. The player volleys the ball straight back at 25.0 m/s. If the ball remains in contact with the racket for 0.060 0 s, what average force acts on the ball?

a. 22.6 N
b. 32.5 N
c. 43.7 N
d. 102 N


QUESTION 27


A 5-kg cart moving to the right with a speed of 6 m/s collides with a concrete wall and rebounds straight back with a speed of 2 m/s. What is the change in momentum of the ca

a. 0
b. - 40 kg.m/s
c. - 240 kg.m/s
d. - 210 kg.m/s