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Energy can be transformed from one form to another. A stone held high in the air has potential energy; as it falls, it loses potential energy, since its height above the ground decreases. At the same time, it gains in kinetic energy, since its velocity is increasing. Potential energy is being transformed into kinetic energy. ---- At the base of the dam, the kinetic energy of the water can be transferred into turbine blades and further transformed into electric energy.
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As for potential energy, it is the energy associated with forces that depend on the position or configuration of a body or bodies and the surroundings. |
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The word “work” has a variety of meanings in everyday language, but in physics, work is given a very specific meaning to describe what is accomplished by the action of a force. |
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Similarly, water at the top of a dam has potential energy, which is transformed into kinetic energy as the water falls. |
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Besides the kinetic and potential energy of ordinary objects, there are other forms of energy, which include electric energy, nuclear energy, thermal energy, and chemical energy. |
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For instance, according to the atomic theory, thermal energy is interpreted as the kinetic energy of rapidly moving molecules. |