noun
coefficient of restitution
Physics term for the ratio of relative speed after collision to relative speed before collision. Used in mechanics and material science.
反発係数が1に近いほど、衝突前後の運動エネルギーの損失が少ない。
The closer the coefficient of restitution is to 1, the smaller the loss of kinetic energy before and after the collision.
Compound of 反発 (repulsion, rebound) and 係数 (coefficient). A technical term formed from standard Sino-Japanese components.