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[hawrs-pou-er] /ˈhɔrsˌpaʊ ər/

a foot-pound-second unit of , equivalent to 550 foot-pounds per second, or 745.7 watts.
Informal. the capacity to achieve or produce; strength or talent:
The university’s history faculty is noted for its intellectual horsepower.
an fps unit of power, equal to 550 foot-pounds per second (equivalent to 745.7 watts)
a US standard unit of power, equal to 746 watts

1806, from horse (n.) + power (n.); established by Watt as the power needed to lift 33,000 pounds one foot in one minute, which is actually about 1.5 times the power of a strong horse.
A unit that is used to measure the power of engines and motors. One unit of horsepower is equal to the power needed to lift 550 pounds one foot in one second. This unit has been widely replaced by the watt in scientific usage; one horsepower is equal to 745.7 watts.

A unit of power equal to about 746 watts.

Note: The horsepower is used to measure the power of engines.

Note: This term was coined by James Watt, who invented a new type of steam engine in the eighteenth century. Watt found that the horse could do a certain amount of work per second; when he sold his steam engines, this measurement allowed him to estimate the worth of an engine in terms of the number of horses it would replace. Therefore, a six-horsepower engine was capable of replacing six horses.


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