Is a roller coaster going downhill kinetic or potential energy?
The train of coaster cars speeds up as they lose height. Thus, their original potential energy (due to their large height) is transformed into kinetic energy (revealed by their high speeds).
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While going down the hill, the roller coaster picks up more and more speed. The potential energy the cart had at the top of the hill transforms into kinetic energy at the bottom of the hill. Because you are moving so fast, you have a very high kinetic energy, and a very low potential energy.
The maximum kinetic energy generated is when the roller coaster is at the bottom of the track. When it begins to go up, the kinetic energy converts to potential energy.
Rollercoaster trains have no engine or no power source of their own. Instead, they rely on a supply of potential energy that is converted to kinetic energy. Traditionally, a rollercoaster relies on gravitational potential energy – the energy it possesses due to its height.
For example, a rollercoaster car at the top of a hill has potential energy because it has the ability to move downward. This potential energy is converted into kinetic energy, or the energy of motion, when the rollercoaster car starts to move.