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Homework Help: Electrostatics coulomb's law problem

  1. Dec 9, 2006 #1
    1. The problem statement, all variables and given/known data
    how to use coulomb's law to find the r value of the three points when the total distance is 50 cm


    2. Relevant equations

    f=Kqq/r^2

    3. The attempt at a solution

    i assumed that is it was uniform and sais r1+r2=r3 but now i think that is wrong
     
  2. jcsd
  3. Dec 9, 2006 #2
    By "three points" do you mean "three charges" ? There is one key concept you must use when dealing with charges, that is the concept of superposition.
     
  4. Dec 9, 2006 #3

    OlderDan

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    Homework Helper

    We cannot help you without a clear statement of the problem you are trying to solve.
     
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