A ball whose mass is 0.2 kg hits the floor with a speed of 8 m/s and rebounds upward with a speed of 7 m/s. The ball was in contact with the floor for 0.5 ms (0.5 × 10−3 s). (a) What was the average...

A ball whose mass is 0.2 kg hits the floor with a speed of 8 m/s and rebounds upward with a speed of 7 m/s. The ball was in

contact with the floor for 0.5 ms (0.5 × 10−3 s).

(a) What was the average magnitude of the force exerted on the ball by the floor?

(b) Calculate the magnitude of the gravitational force that the Earth exerts on the ball.

(c) In a collision, for a brief time there are forces between the colliding objects that are much greater than external

forces. Compare the magnitudes of the forces found in parts (a) and (b).