Скачать или смотреть Chapter 2 - Force & Motion KSSM Form 4 ( Part 2 video) - Errata(Read description)

Errata :
1. I said in the video that, for elastic collision, both particles will move in opposite/different direction after they collide(final condition). Well, that's entirely WRONG !! They not necessarily move in opposite directions, i.e. they can move in the same direction after collision as long as they don't STICK together or they separate. The total kinetic energy for elastic collision is conserved. However, the total kinetic energy for inelastic collision is not conserved but the total energy(E total) is conserved, of course !
2. For elastic collision, most of the cases where the objects will end up sticking with each other but again NOT NECESSARILY the case. The key to consider is as long as total kinetic energy for the system is not conserved then we sure that the objects experience inelastic collision. For the case they stick with each other, it's called, completely inelastic situation . CIAOOOO !!