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What is horsepower in physcis?

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Anonymous

13y ago
Updated: 8/20/2019

An (inconvenient) unit for force.

>

Harking back to james watt, an experiment to define a unit for power

(today thats the watt)

Using a strong horse he timed how long it took to lift a weight up a mineshaft

using a horse and a pulley wheel.

His definition for work done was: force (to overcome load) * distance (travelled)

His definition for power was work done / time taken

Example data:

It took 1 minute to lift 165 pounds 200 feet up the shaft

So >

force * distance / time = 33000 (lbs force - feet) / minute

In SI units that is:

733.956 newtons - 60.96 metres in 60 seconds

= 745.699 Watts ( 1 imperial horsepower)

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Wiki User

13y ago

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