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Originally Posted by Bang&Olufsen DK
you divide 100lbs by 500lbs/ft and get 5ft. for every 1 ft there was 100lbs of force applied. thereby, the resulant functioning force of the rod for torque multiplication would be 100 pound per foot, OR 100lbs/ft.
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no disrespect or anything, but your units are reversed. Torque is a force multiplied by a distance, not divided by a distance. This is the essense of your example. 100 lbs of force, multiplied by a 5 ft lever gives you 500 lbs*ft of torque. It is because they multiply that levers give you MORE torque instead of less.
If it was divided then your lever would make it harder to turn a bolt instead of easier. Also, just examining the units by themselves, if you had 500 lbs/ft of something and divided it by 100 lbs, you would get 5/ft which is not the same as 5 ft. If you divide the 100 lbs by 500 lbs/ft you will get 1 ft / 5, which is clearly not what you are looking for. The units are just reversed, that's the only thing I see wrong.
Anyway, that was a great writeup on horsepower, I very much enjoyed reading what it means in relation to work, rpm, and time.
