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Voltage*current is Power. Watts is power, and HP is power. It's not force.
BUT!
If you divide power by speed you get watt*hr/mi (which is FORCE). So, if you know the speed you are which you are traveling, you can find the watt*hr/mi...
In the example you gave:
240v*90amp = 21450 watt of POWER. That is the same as 28.8 horsepower of POWER.
Let's say you were measuring that 240 volts and 90 amps at 50 miles per hour.
That would be 240*90/50 watt*hr/mi = 429 watt*hr/mi.
Let's say you measured 240v and 90 amps at 100 miles per hour.
That would be 240*90/100 watt*hr/mi = 214.15 watt*hr/mi.
Let's say you have a big fat slug of a car. 240v and 90 amps at only 10 miles per hour.
That would be 240*90/10 watt*hr/mi = 2160 watt*hr/mi.
Ecomodders would come from all around and hunt you down and kill you! hahaha
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