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Old 6th August 2016, 02:31 PM
Andy P's Avatar
Andy P Andy P is offline
Gently does it......
Join Date: Jan 2014
Member of: Mid Shires Marksmen
Location: Bedfordshire
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The coefficient of restitution (COR) is a measure of the "restitution" of a collision between two objects: how much of the kinetic energy remains for the objects to rebound from one another vs. how much is lost as heat, or work done deforming the objects.

The coefficient, e is defined as the ratio of relative speeds after and before an impact, taken along the line of the impact:

Coefficient of restitution ( e ) = Relative velocity after collision
Relative velocity before collision

Alternatively, this may be expressed as: Relative velocity of separation = e Relative velocity of approach.
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