What is the coefficient of restitution (e)?

Ratio of initial to final relative velocities Ratio of final to initial relative velocities Product of initial to final relative velocities Ratio of final to initial velocity of a body

Ratio of final to initial relative velocities

The coefficient of restitution (e) is the ratio of the final to initial relative velocities in a collision system. If the value of e = 1, then the collision is perfectly elastic. If it is equal to 0, then the collision is perfectly inelastic.