perpetual motion
From Wiktionary, the free dictionary
Noun
perpetual motion (uncountable)
- (physics) The motion of some hypothetical device that continues forever with no external input of energy, in violation of the laws of thermodynamics.
Usage notes
- In the literal sense, perpetual motion can exist in an ideal isolated system, such as a single photon moving through empty space. However, a perpetual motion machine which produces work while retaining its kinetic energy is impossible under the known laws of physics.
Derived terms
Translations
Translations
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Further reading
perpetual motion on Wikipedia.Wikipedia - Laws of thermodynamics on Wikipedia.Wikipedia
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