Power; which is the amount of work done over a time period.
Horsepower is typically used to measure the power in a car's engine.
Mechanical horsepower — 0.74569987158227022 kW (33,000 ft·lbf per minute). But the term horsepower has been used for various measurements.
According to Wikipeida: http://en.wikipedia.org/wiki/Horsepower
"The horsepower (hp) is the name of several non-metric units of power. In scientific discourse the term "horsepower" is rarely used because of the various definitions and the existence of an SI unit for power, the watt (W). However, the idea of horsepower persists as a legacy term in many languages, particularly in the automotive industry for listing the maximum rate of power application of internal-combustion engines.
There are two important factors to consider when evaluating a "horsepower" figure:
Various definitions for the unit itself
Various standards for measuring the value
These factors can be combined in unexpected ways — the true power output for an engine rated at "100 horsepower" might vary significantly from a reader's expectations. For this reason, various groups have attempted to standardize both the definition and measurement system, often leading to even more confusion. Although the SI watt is not subject to varying definitions, it can still vary based on the measurement conditions.
There have been many definitions for the term over the years since James Watt first coined the term in 1782. The following metrics have been widely used:
Mechanical horsepower — 0.74569987158227022 kW (33,000 ft·lbf per minute)
Metric horsepower — 0.73549875 kW
Electrical horsepower — 0.746 kW
Boiler horsepower — 9.8095 kW
Additionally, the term "horsepower" has been applied to calculated (rather than measured) metrics:
RAC horsepower is based solely on the dimensions of a piston engine
Mechanical horsepower
See History of the term "horsepower"
The most common definition of horsepower for engines is the one originally proposed by James Watt in 1782. Under this system, one horsepower is defined as:
1 hp = 33,000 ft·pound-force·min−1 = exactly 745.69987158227022 W
A common memory aid is based on the fact that Christopher Columbus first sailed to the Americas in 1492. The memory aid states that 1 hp = ½ Columbus or 746 W.
In fourteen hundred and ninety-two
Columbus sailed the ocean blue.
Divide that son-of-a-gun by two
And that's the number of watts in a horsepower too."
2006-11-14 08:52:03
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answer #1
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answered by Dan S 7
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The pulling strength of a horse. If something takes 6 horsepower to move, it would take 6 horses to move it. A 75 hp outboard motor is like waterskiing behind 75 running horses. Yee-haw.
P.S. The peak power of one horse over a few seconds has been measured to be as high as 14.9 Hp. However, for longer periods an average horse produces less than one horsepower.
2006-11-14 16:48:04
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answer #2
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answered by Anonymous
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same as number of squirrels under the hood.
Howstuffworks "How Horsepower Works"
Chances are you've heard about horsepower. Just about every car ad on TV mentions it and there are horsepower ratings on everything from lawn mowers to ...
auto.howstuffworks.com/
horsepower.htm - 60k - Cached - Similar pages
Horsepower - Wikipedia, the free encyclopedia
Metric horsepower, as a rule, is defined as 0.73549875 kW, or roughly 98.6% of ... Brake or net horsepower (power delivered directly by the engine) ...
en.wikipedia.org/wiki/
Horsepower - 56k - Cached - Similar pages
What is Horsepower?
Put another way, if you were to lift 33000 pounds one foot over a period of one minute, you would have been working at the rate of one horsepower. ...
www.web-cars.com/
math/horsepower.html - 7k
2006-11-14 16:53:52
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answer #3
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answered by homelessinorangecounty 3
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It is a group of 4 legged animals that have banded together to raise the treatment of all horse.
2006-11-14 17:44:58
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answer #4
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answered by Anonymous
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Horsepower is defined as work done over time. The exact definition of one horsepower is 33,000 lb.ft./minute. Put another way, if you were to lift 33,000 pounds one foot over a period of one minute, you would have been working at the rate of one horsepower. In this case, you'd have expended one horsepower-minute of energy.
2006-11-14 16:53:12
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answer #5
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answered by johntadams3 5
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1 horsepower = 745.699872 watts
It's a power unit
2006-11-14 16:48:53
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answer #6
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answered by Stone 2
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If I remember correctly,1 horsepower is what it takes to lift 1 ton in 1 minute....
2006-11-14 16:47:28
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answer #7
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answered by festeringhump 4
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It is a unit of measurement these days its used to define how powerful automobiles are.
2006-11-14 16:49:05
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answer #8
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answered by jazzy 4
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Horse power is the speed of which the vechicle maves at likeM.P.H (milesperhour) it's shown on the reader
2006-11-14 16:48:41
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answer #9
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answered by Guitar Hero #1 2
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Here ya go.......
http://en.wikipedia.org/wiki/Horsepower
2006-11-14 16:47:42
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answer #10
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answered by Anonymous
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