ZANE said: (quoted from post at 20:15:40 11/24/14) 1 Horse power is the amount of energy it requires
to lift 100 pounds 1 foot in 1 minute.
Zane
Make that 33000 pounds in one minute and you would be right.
From the online lecture notes for GS321 (General Science) at Western Oregon University:
To promote his steam engines, James Watt compared the amount of work an engine could do to the common power source of the late 1700s, the horse. One horsepower (hp) was defined as the amount of work a horse does to lift a 33,000 pound weight a distance of one foot in one minute. This may seem like an odd definition, but it was based on the work a horse did hauling coal (Watt was trying to encourage the use of steam engines in coal mining).
1 hp = 33,000 foot-pounds (ft/lb)/min
A horse moving 33,000 pounds of coal a distance of one foot; one moving 330 pounds a distance of 100 feet; or another moving 33 pounds 1,000 feet in a minute are all exerting the same power.
That is equivalent to lifting 550 pounds 1 foot in one second (550 x 60 = 33000) - another way to define 1 HP.
TOH
This post was edited by TheOldHokie at 17:24:54 11/24/14 4 times.
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