An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved in an elastic collision. In this case of collision, the kinetic energy before the collision and after the collision remains the same and is not converted to any other form of energy. In an elastic collision, the kinetic energy before the collision and after the collision remains the same. It is not converted to other forms of energy.