Basics

A Unit of Power often used for engines and motors
Was originally used to show steam engines could do the work of work horses
Confusing as there is a metric version, an imperial/customary version, and different "load type" versions
For the imperial standard "horsepower" (most common?), one mechanical horsepower lifts 550 pounds (250 kg) by 1 foot in 1 second
Imperial is also equal to 745.7 watts, which is considered the "official" unit by the EU rather than for marketing purposes

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