How do you calculate the coefficient of restitution?
The coefficient of restitution often denoted
This law states that: "in a system of colliding bodies(usually 2 bodies) the relative velocity of separation is directly proportional to the relative velocity of approach".
For a system of colliding bodies
The constant of proportionality is
Thus we have,
Thus, all you need to calculate e are the respective initial and final velocities of the two bodies involved in collision.