3. In completely inelastic collisions, kinetic energy is not conserved; instead some of that energy will be converted to non-mechanical energy. In this experiment the work done by air resistance or by friction with the track during the collision is negligible. What are the two significant types of non-mechanical energy that the kinetic energy is converted into in this experiment (remember that this is energy lost during the very brief collision, not as the cart moves down the track). (3 points)