Coefficient of restitution

Japanese: coefficient of restitution(英語表記)coefficientofrestitution
Coefficient of restitution

…Generally, the degree of repulsion is expressed by the ratio of the relative velocities before and after (the negative sign is used because the direction of v 1 - v 2 and the direction of v 1 ' - v 2 ' are opposite directions). e is called the coefficient of restitution, and e = 1 is a perfectly elastic collision, 0 < e < 1 is an inelastic collision, and e = 0 is called a perfectly plastic collision or a perfectly inelastic collision. When e < 1, the energy of the relative motion is converted into the internal energy (thermal energy) of the ball after the collision. …

*Some of the terminology explanations that refer to "coefficient of restitution" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…一般には,これら前後の相対速度の比をもって反発の度合を表す(負号をつけるのはv1v2の方向とv1′-v2′の方向が反対方向のため)。eを反発係数coefficient of restitutionといい,e=1が完全弾性衝突,0<e<1が非弾性衝突であり,e=0は完全塑性衝突,または完全非弾性衝突と呼ばれる。e<1の場合は相対運動のエネルギーは衝突後球の内部エネルギー(熱エネルギー)に変換される。…

※「coefficient of restitution」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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