elastic collision

noun Mechanics.
a collision in which the total kinetic energy of the colliding bodies or particles is the same after the collision as it was before (opposed to inelastic collision ).

Origin:
1925–30

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American Heritage
Science Dictionary
elastic collision   (ĭ-lās'tĭk)  Pronunciation Key 
Physics
A collision between bodies in which the total kinetic energy of the bodies is conserved. In a perfectly elastic collision, no energy is dissipated as heat energy internal to the bodies, and none is spent on permanently deforming the bodies or radiated away in some other fashion. Elastic collisions, such as the collision of a rubber ball on a hard surface, result in the reflection or "bouncing" of bodies away from each other. Comapre inelastic collision.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
It helps to first examine a much simpler problem such as an elastic collision on a pool table.
The device measures the scattered electron angle and the recoil proton angle of an elastic collision.
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