A ball hits a wall horizontally at 8.0 m/s-1. It rebounds horizontally at 4.4 m s-1. The ball is in contact with the wall for 0.040 s. What is the acceleration of the ball?
Initial velocity, u=8m/s
Final velocity ,v=-4.4m/s (the ball rebounds in opposite direction)
Time, t = 0.040 s