Posted by **Me** on Sunday, December 19, 2010 at 2:15pm.

Please help me to solve this problem about

electic potential :

An electric car accelerates for 7.0 s by drawing energy from its 290-V battery pack. During this time, 1200 C of charge pass through the battery pack .

Find the minimum horsepower rating of the car.

- physics -
**Damon**, Sunday, December 19, 2010 at 2:32pm
Joules = Watt seconds = i V t = Q t = 1200*290 = 348000 Joules

Watts = Joules/second = 348000/7 = 49,714 Watts

I do not remember the conversion from Watts to hp

- physics -
**bobpursley**, Sunday, December 19, 2010 at 4:00pm
do this: Paste in the google search window

1hp in watts

then memorize that number

Then, even lazier, put in the google search window

49714 watts in hp

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