PERPETUALMOTION

Perpetual motion

Perpetual motion describes motion that continues indefinitely without any external source of energy. This is impossible in practice because of friction and other sources of energy loss. Furthermore, the term is often used in a stronger sense to describe a perpetual motion machine of the first kind, a "hypothetical machine which, once activated, would continue to function and produce work" indefinitely with no input of energy. There is a scientific consensus that perpetual motion is impossible, as it would violate the first or second law of thermodynamics.

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perpetual motion

Noun

  1. The motion of some hypothetical device that continues forever with no obvious input of energy in violation of the laws of thermodynamics.


The above text is a snippet from Wiktionary: perpetual motion
and as such is available under the Creative Commons Attribution/Share-Alike License.

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