A steel ball (140 gm) is fired at 120 ms-1 toward a nether steel ball (4 kg) on a smooth frictionless surface. Draw a diagram and suppose that the collision is elastic. Determine:
1) The momentum of the balls after the collision.
2) The momentum of the balls before the collision.
3) The total kinetic energy of the balls after the collision.
4) The total kinetic energy of the balls before the collision.