Does Elastic Collision Stick Together?

If objects stick together, then a collision is perfectly inelastic. When objects don't stick together, we can figure out the type of collision by finding the initial kinetic energy and comparing it with the final kinetic energy. If the kinetic energy is the same, then the collision is elastic.

Why do inelastic collisions stick together?

A perfectly inelastic collision occurs when the maximum amount of kinetic energy of a system is lost. In a perfectly inelastic collision, i.e., a zero coefficient of restitution, the colliding particles stick together. In such a collision, kinetic energy is lost by bonding the two bodies together.

Are elastic collisions isolated?

Although the momentum of individual objects may change during a collision, the total momentum of all the objects in an isolated system remains constant. ... Elastic collisions involve objects which separate after they collide, and which are not changed at all by the interaction.