# Work output

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In [physics](/source/physics), ''work output'' is the [work](/source/Mechanical_work) done by a [simple machine](/source/simple_machine), [compound machine](/source/compound_machine), or any type of engine model. In common terms, it is the energy output, which for simple machines is always less than the energy input, even though the [force](/source/force)s may be drastically different.

In [thermodynamics], work output can refer to the [thermodynamic work](/source/Work_(thermodynamics)) done by a [heat engine](/source/heat_engine), in which case the amount of work output must be less than the input as energy is lost to heat, as determined by the engine's [efficiency](/source/Energy_conversion_efficiency).

==References==
*{{cite book|author=NewPath Learning|title=Work, Power & Simple Machines Science Learning Guide|url=https://books.google.com/books?id=0piDAwAAQBAJ&pg=PA8|date=1 March 2014|publisher=NewPath Learning|isbn=978-1-63212-074-8|pages=8–}}

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Category:Thermodynamics

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Adapted from the Wikipedia article [Work output](https://en.wikipedia.org/wiki/Work_output) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Work_output?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.