A perfectly

collision occurs when two objects stick together and kinetic e

An inelastic collision is one in which objects stick together after impact, and kinetic energy is not conserved. This lack of conservation means that the forces between colliding objects may convert kinetic energy to other forms of energy, such as potential energy or thermal energy.

Answer: Perfectly inelastic collision.

Explanation: An inelastic collision is when the kinetic energy is not conserved after the collision.

A perfectly inelastic collision happens when the maximun kinetic energy is lost, in this situation, after the collision both objects wil move togheter (as one) with the same velocity (so they "stick" togheter), so the answer is "inelastic"