A 2200-kg sport utility vehicle traveling at 94 km/h can be stopped in 0.25 s if it hits a concrete wall. Assume a 60 kg person was in the car that hit this wall. The velocity of the person equals that of the car both before and after the crash, and the velocity changes in 0.25 s.
a) What is the average force exerted on the person?
N (in a direction opposite to the initial motion)