At which position is the roller coaster car's amount of potential energy about equal to the amount of kinetic energy?

The mass of the cars and people and the height of the track where the cars are located determine the potential energy in the system. Potential energy depends on an object’s mass and height and the gravitational pull on the object. A change in gravity would result in a change in potential energy. For example, if the track were located on the Moon instead of Earth, the potential energy would be different.

Explanation:

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in this image, you can see solar radiation going through ocean water.

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