500
Explain where the potential and kinetic energy is on top of a roller coaster hill and going down the hill and how some of the mechanical energy changes into thermal energy? What is the name of this law?
What is as the cars go up and down the hills on the track, their potential energy in converted into kinetic energy and back again. On a roller coaster, some mechanical energy is always converted into thermal energy because of friction. This is the law of conservation of energy.