What is the magnitude of the average force acting on the ball during the collision? Answer in units of N.

Question

A 535 g ball strikes a wall at 15.5 m/s and rebounds at 12.3 m/s. The ball is in contact with the wall for 0.039 s. What is the magnitude of the average force acting on the ball during the collision? Answer in units of N.

Answer 1

The key equation here is a version of Newton's 2^nd Law: FΔt = mΔv.

Solve for F, but don't forget that the rebound velocity is negative.