restitution coefficient

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Symbol e. A measure of the elasticity of colliding bodies. For two spheres moving in the same straight line, e = (v2v1)/(u1u2), where u1 and u2 are the velocities of bodies 1 and 2 before collision (u1 > u2) and v1 and v2 are the velocities of 1 and 2 after impact (v2 > v1). If the collision is perfectly elastic e = 1 and the kinetic energy is conserved; for an inelastic collision e < 1.

Subjects: Physics.

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