"And as we know from this particular crash situation, we've got debris from across the road, into the Société, and indeed nous-mêmes the helicopter where it landed je the roof." When two bodies collide but there is no loss in the overall kinetic energy, it is called a perfectly elastic https://fetzner-collision.dgbloggers.com/29476600/fetzner-collision-rochester-s-premier-autobody-repair-exercé-since-1948