Perpetual motion

:See also Perpetuum mobile as a musical term and Perpetual Motion as a solitaire game.

Related Topics:
Perpetuum mobile - Perpetual Motion

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Perpetual motion refers to a condition in which work is done without an energy source. Perpetual motion machines (the Latin term perpetuum mobile is not uncommon) are a class of hypothetical machines which would produce useful energy in a way which would violate the established laws of physics. It is generally accepted that perpetual motion machines cannot work. In particular, perpetual motion machines would violate either the first or second laws of thermodynamics. Perpetual motion machines are divided into two subcategories defined by which law of thermodynamics would have to be broken in order for the device to be a true perpetual motion machine.

Related Topics:
Latin - Hypothetical - Energy - Laws - Physics - Laws of thermodynamics

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