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Net Electric Force

  1. Feb 4, 2015 #1
    1. The problem statement, all variables and given/known data

    In the above figure, if Q1 and Q2 are positive, where could a negative charge be placed and have a vertically upward net force on it?

    2. Relevant equations
    F = k|q||q| / (r^2)

    3. The attempt at a solution
    I wrote the force equations for the negative charge and both positive charges, but I have no idea how to proceed from there.
  2. jcsd
  3. Feb 4, 2015 #2
    Please do not reply, I have figured this out
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