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On a roller coaster, energy changes from potential to kinetic energy and back again many times over the course of a ride. Kinetic energy is energy that an object has as a result of its motion. All moving objects possess kinetic energy, which is determined by the mass and speed of the object. Potential energy is the energy an object has as a result of its position. Potential energy is stored energy that has not yet been released. Gravitational potential energy is potential energy that results from an object's position in a gravitational field, and is equal to the object's weight multiplied by its height. For example, a book placed on a shelf possesses gravitational potential energy because of Earth's gravity.
In physics, matter is considered to possess two kinds of energies ââ kinetic or potential energy. Kinetic energy is defined as the energy an object displays or possesses because of some kind of motion or action. Potential energy, on the other hand, is the energy an object possesses or displays by virtue of its state of rest. While potential energy is non-related to the environment of the object, kinetic energy is completely relative to the other moving or stationary objects in the environment. If an object is moving in an environment where other objects are moving too, the acceleration of the object will not be evident at all.