Answer to Question #256540 in Physics for megs

Question

A toy car with a mass of 85 g traveling 10.6 m/s hits a wall and bounces back at 2.2 m/s in the opposite direction at the moment instantly after the collision. If the impact force the wall exerts on the toy car is 6.1 N, for how long was the toy car in contact with the wall?

Your Answer:

Answer 1

The time of impact is

$$t=\Delta p/F=(m\Delta v)/F=\\ =(0.085(10.6+2.2))/6.1=0.178\text{ s}.$$