Question

Explain perfectly inelastic collision

Answer 1

A perfect inelastic collision occurs when the maximum amount of kinetic energy of a system is lost.

Answer 2

Perfectly Inelastic Collision occurs when two moving bodies collide with each other in such a way they lose most or maximum of their kinetic energy, come to rest position, as if they have become single unit because of bonding.  

Here, energy is not conserved, but momentum is conserved.

The coefficient of restitution is equal to zero, for a perfectly inelastic collision.

Hope it helps.