# physics

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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 -

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 -

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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