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Homework Help: Coulomb's Law for two charges

  1. Oct 4, 2009 #1
    I have a quick question about using Coulomb's Law, and I was hoping someone would be able to help me.
    There are two identical charges which are one meter apart that are repelling each other with a force of 1 N each. What is the magnitude (Coulombs) of each charge?

    I tried using Coulomb's law for each of the two charges, and just setting up an arbitrary point where Q1 was located at (0,0) and Q2 is located at (1,0), but I believe this is the wrong way to solve the problem, as I simplified the answer to 1=1.
    Is there something that I am missing here? I am using F = k(q1q2)/r^2

    Thank you.
  2. jcsd
  3. Oct 5, 2009 #2


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    Staff: Mentor

    You would seem to have everything defined in that equation except the magnitude of the charge. Show us the numbers you plugged into that equation, and solve for q=q1=q2.
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