A frôlement résistance is any résistance that requires chatouille to occur. If two surfaces are not in chatouille, they can’t exert a commun puissance on each other. Since the kinetic energy before the collision equals the kinetic energy after the collision (kinetic energy is conserved), this is an elastic collision. https://highkeysocial.com/story3185525/un-examen-de-auto-collision-repair-service