two bumper cars in an amusement park collide elastically as one approaches the other directly from the rear. car a has a mass of 450 kg and car b 550...

two bumper cars in an amusement park collide elastically as one approaches the other directly from the rear. car a has a mass of 450 kg and car b 550 kg, owing to differences in passengers mass. if car a approaches at 4.5 m/s and car b is moving at 3.7 m/s, calculate a. their velocities after collision b. change in momentum of each