Comment on Energy Conservation We have seen that the total kinetic energy of a system undergoing an inelastic collision is not conserved Energy is lost 》Heat(bomb) >)Bending of metal (crashing cars) Kinetic energy is not conserved since work is done during the collision Momentum along a certain direction is conserved when there are no external forces acting in this direction In general, easier to satisfy than energy conservation Physics 121: Lecture 16, Pg 5Physics 121: Lecture 16, Pg 5 Comment on Energy Conservation We have seen that the total kinetic energy of a system undergoing an inelastic collision is not conserved. Energy is lost: »Heat (bomb) »Bending of metal (crashing cars) Kinetic energy is not conserved since work is done during the collision ! Momentum along a certain direction is conserved when there are no external forces acting in this direction. In general, easier to satisfy than energy conservation