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Homework Help: Calculate Coulomb

  1. Feb 24, 2014 #1
    1. The problem statement, all variables and given/known data

    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.

    2. Relevant equations

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

    3. 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?
  2. jcsd
  3. Feb 24, 2014 #2


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    Could you please tell us the problem statement exactly as given to you?

    Where did you get these numbers from?

    A volt is a joule per coulomb, but "Js = 12000" doesn't make any sense.
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