Elastic Collision
A collision between bodies in which both total linear momentum and total kinetic energy are conserved.
Governing formula
∑ p_i = ∑ p_f, ∑ KE_i = ∑ KE_f
SI unit
kg·m/s, J
In depth
No mechanical energy is converted into heat, sound, or permanent deformation during elastic collisions.
Examples in the real world
Collisions between hard steel ball bearings or subatomic gas particles.