Gravity and Kinetic Energy:
Once the roller coaster reaches its highest point, it will slide down. Sliding down is due to gravity. According to the effect of the earth’s gravity, objects have more potential energy at high places and more kinetic energy at low places. As the roller coaster slides, its potential energy is gradually converted into kinetic energy.
The design of the roller coaster makes the kinetic energy increase continuously and the speed gradually increase during the descent. The shape and inclination of a roller coaster track cause its speed to increase. Each part of the track is designed to have different heights. So the roller coaster can maintain a relatively constant speed when sliding down.
As the roller coaster descends, the kinetic energy gradually builds up enough to allow the roller coaster to complete a complete loop of the track. When the roller coaster reaches the lowest point of the track, its kinetic energy is at its maximum. At this point, the roller coaster will enter a series of turns and ups and downs. So it can provide excitement and entertainment for tourists.