For some collisions that we call "elastic collisions," both kinetic energy and momentum are conserved. In general, elastic collisions happen between very bouncy objects—like two rubber balls, or ...

This would be an elastic collision. In this case, I could also say: ... After that collision, ball 3 will move to the left with a speed v and ball 4 will stop.

Elastic Collision and Stored Energy (1961) Posted: March 14, 2025 | Last updated: July 10, 2025. Illustrates how kinetic energy is transferred from one body to another through elastic collisions.

Learn how to understand and model collisions including explosions in terms of momentum, velocities and the forces involved for Higher Physics.