反発 はんぱつ係数 けいすうじゃなかったです
hampatsukeisūjanakattadesu

Noun
Desu Copula

The polite, past negative form of 反発係数

1. Wasn't the coefficient of restitution.; Wasn't the rate of repulsion.

Past/Perfective
Negative
Polite
Casual Register
Physics