12. A pitcher throws a baseball with a velocity of 27 m/s. After being struck by a bat the ball travels in
the opposite direction with a velocity of 40 m/s. If the ball has a mass of 0.11 kg and is in contact
with the bat for 3.0 ms, the magnitude of the average force exerted by the bat on the ball is
0.99 KN
4.8 kN
a.
b.
C.
2.5 kN
d. 7.4 kN