At a county fair, two children ram each other head-on while riding on the bumper cars. Jill and her car, traveling left at 3.10m/s, have a total mass of 330kg. Jack and his car, traveling to the right at 1.80m/s, have a total mass of 255kg.
1. Assuming the collision to be elastic, decide the speed of Jill and her car after the collision.
2. Decide the speed of Jack and his car after the collision.