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Re: Watt's definition of horsepower



Tim O'Donnell wrote:

My textbook states Watt basically said a horsepower is the rate of
work a horse can do for a sustained period of time. Any clue to what
would be considered a sustained period of time?

My guess is 8 hours, at least. But the unit of power, HP, was
defined in terms of Ft-Lb, not in terms of a horse.