Calculate Coulomb

  • #1

Homework Statement



The engine delivers 12 kW. Per second it can shift the m = 800 kg car over a vertical distance of 1.5 m. Find the current delivered by the batteries.

Homework Equations



P = U * I
I = P/U = 12 000 W / 168 V = 71.4 A

The Attempt at a Solution



My Problem is: I don't really know how to calculate V...
I know that V = J/C and Js = 12 000, but I don't know how to find out the Coulomb.
Can please someone help?
 

Answers and Replies

  • #2
vela
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Homework Statement



The engine delivers 12 kW. Per second it can shift the m = 800 kg car over a vertical distance of 1.5 m. Find the current delivered by the batteries.
Could you please tell us the problem statement exactly as given to you?

Homework Equations



P = U * I
I = P/U = 12 000 W / 168 V = 71.4 A
Where did you get these numbers from?

The Attempt at a Solution



My Problem is: I don't really know how to calculate V...
I know that V = J/C and Js = 12 000, but I don't know how to find out the Coulomb.
Can please someone help?
A volt is a joule per coulomb, but "Js = 12000" doesn't make any sense.
 

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