Abilliard ball strikes and rebounds from the cushion of a pool table perpendicularly. the mass of the ball is 0.38 kg the ball approaches the cushion with a velocity of +2.20 m/s and rebounds with a velocity of -1.70 m/s. the ball remains in contact with the cushion for a time of 3.40 x 10^-3 s. what is the average net force (magnitude and direction) exerted on the ball by the cushion?

Force is 432.94 N along the rebound direction of ball.

Explanation:

Force is rate of change of momentum.

Final momentum = 0.38 x -1.70 = -0.646 kgm/s

Initial momentum = 0.38 x 2.20 = 0.836 kgm/s

Change in momentum = -0.646 - 0.836 = -1.472 kgm/s

Time = 3.40 x 10⁻³ s

Force is 432.94 N along the rebound direction of ball.

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation: