A student athlete kicks a soccer ball from rest. The mass of the soccer ball equals 0.45 kg and her foot is in contact with the ball for 0.3 seconds. The soccer ball moves down the field with a
speed of 6.0 m/s. Based on this information, the force of the kicker's foot on the ball is 9.0 N.
But what magnitude of force did the 0.45 kg ball exert on the kicker's foot?