Physics
Elastic Collisions
Quick fact
In an elastic collision, both momentum and kinetic energy are conserved, making it a key idea in physics.
Why this is interesting
Have you ever watched billiard balls collide and keep moving? That’s an example of elastic collisions in action—objects transferring energy without losing speed.
Read the full explanation
Understanding Elastic Collisions
When two objects collide elastically, they bounce off each other while maintaining their total kinetic energy. Think of a tennis ball hitting the ground and bouncing back—its speed changes direction but not much in magnitude. This kind of collision is idealized, where no energy is lost to heat or sound.
A deeper explanation
Elastic collisions are governed by two fundamental principles: conservation of momentum and conservation of kinetic energy. These laws ensure that the total motion before and after a collision remains unchanged in an ideal scenario. While real-world collisions often have some energy loss, elastic collisions serve as a useful model for understanding how objects interact in physics.