Aroller coaster track is a good example of the law of conservation of energy. use this law to explain these facts about a roller coaster track. a. the largest hill for a roller coaster track is the first hill on the track. the hills after the first are smaller and smaller. b. to get to the top of the first (highest) hill, a motor pulls the cars up to the top. after the top of the first hill, a motor is not needed to keep the cars going. c. the roller coaster car moves really fast at the bottom of a hill on the track but slows down as it moves up a hill (not including the first hill).