Question

Definition of coefficient of restitution

Answer 1

coefficient of restitution is the ration of velocity of separation to velocity of approach

Answer 2

The coefficient of restitution is the ratio of the final to initial relative velocity between two objects after they collide. It normally ranges from 0 to 1 where 1 would be a perfectly elastic collision. A perfectly inelastic collision has a coefficient of 0, but a 0 value does not have to be perfectly inelastic.