Two bumper cars in an amusement park ride
collide elastically as one approaches the other directly from the rear (Fig.
9-56). Car A has a mass of 450kg and car B 490 kg, owing to differences in
passenger mass. If car A approaches at 4.50 m/s and car B is moving at 3.70
m/s, calculate (a) their velocities after the collision, and (b) the change in
momentum of each.