properties restitution

Restitution in physics refers to the measure of how much kinetic energy is retained after a collision between two objects. It is expressed as a value between 0 and 1: a value of 1 indicates a perfectly elastic collision where no energy is lost, and objects bounce apart with the same speed they had before colliding. A value of 0 signifies a perfectly inelastic collision where objects stick together and maximum energy is lost as heat or deformation. Restitution thus helps describe how "bouncy" a collision is, influencing how objects move after impact.