Watt

=== Examples ===
*A person having a mass of 100&nbsp;kg who climbs a 3-meter-high ladder in 5 seconds is doing work at a rate of about 600 watts. Mass times acceleration due to [[gravity]] times height divided by the time it takes to lift the object to the given height gives the ''rate of doing work'' or ''power''.{{efn-lr|The energy in climbing the stairs is given by {{mvar|mgh}}. Setting {{math|''m'' {{=}} 100 kg}}, {{math|''g'' {{=}} 9.8 m/s<sup>2</sup>}} and {{math|''h'' {{=}} 3 m}} gives 2940&nbsp;J.  Dividing this by the time taken (5&nbsp;s) gives a power of 588&nbsp;W. }}
* A laborer over the course of an eight-hour day can sustain an average output of about 75 watts; higher power levels can be achieved for short intervals and by athletes.<ref>{{Citation | editor1-first = Eugene A | editor1-last = Avallone |display-editors=etal | year = 2007 | title = Marks' Standard Handbook for Mechanical Engineers | edition = 11th | publisher = Mc-Graw Hill | place = New York | isbn = 978-0-07-142867-5 | pages = 9–4}}.</ref>