![]() It is also known as Newton's experimental law. The mathematics were developed by Sir Isaac Newton in 1687. It can be more than 1 if there is an energy gain during the collision from a chemical reaction, a reduction in rotational energy, or another internal energy decrease that contributes to the post-collision velocity. Moreover, if it approaches 1 both the equations will be satisfied approximately, which will contribute to the fact that kinetic energy is conserved. This proves that if the collision is elastic this will be equal to 1. ![]() The value is almost always less than one due to initial translational kinetic energy being lost to rotational kinetic energy, plastic deformation, and heat. Thus, we get an equation where the coefficient of restitution equals 1. It is measured in the Leeb rebound hardness test, expressed as 1000 times the COR, but it is only a valid COR for the test, not as a universal COR for the material being tested. A perfectly inelastic collision has a coefficient of 0, but a 0 value does not have to be perfectly inelastic. It normally ranges from 0 to 1 where 1 would be a perfectly elastic collision. ![]() The coefficient of restitution (COR), also denoted by (e), is the ratio of the final to initial relative velocity between two objects after they collide. Wikipedia (0.00 / 0 votes) Rate this definition:
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