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Homework Help: Given total charge, find individual charges.

  1. Jul 4, 2010 #1
    1. The problem statement, all variables and given/known data

    A total charge of 7.47x10^-6 C is distributed on two different small metal spheres. When the spheres are 6.35 cm apart, they each feel a repulsive force of 15.5011 N. How much charge is on each sphere?

    2. Relevant equations

    F=k Qq/r^2
    Q1+Q2=7.47x10^-6C

    3. The attempt at a solution
    Using the second equation, I put the first equation in terms of Q1 to get F=k Q1(7.47X10^-6 - Q1)/r^2, but I cannot solve for Q1
     
  2. jcsd
  3. Jul 4, 2010 #2

    kuruman

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    Why not? It's a quadratic equation.
     
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