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Strength of electrostatic force

  1. Mar 25, 2008 #1
    1. The problem statement, all variables and given/known data
    Three point charges are located at the corner of an equilateral triangle. The Coulomb constant is 8.98755 X 109 N*m2 / C2
    What is the strength of the electrostatic force on the top charge? Answer in units of N.

    Length of each side is .19m

    Photo: http://rs300l32.rapidshare.com/files/102321145/876fa4a066b34fc617aee82211671f78.jpg


    2. Relevant equations

    F= [k(q1)(q2)] / r^2

    3. The attempt at a solution

    I know I must get F1 & F2, but then I don't know what to do

    F1=[k(2.68E-6)(1.32E-6)] / .19^2 = .880730107

    F2= [k(2.68E-6)(-3.93E-6)] / .19^2



    I
     
  2. jcsd
  3. Mar 25, 2008 #2
    can you please upload the diagram to imageshack.us?
     
  4. Mar 25, 2008 #3
    Vector analysis. Break the force into its components.
     
  5. Mar 25, 2008 #4
    I don't know how to do vector analysis, can you add more info?

    [​IMG]
     
    Last edited: Mar 25, 2008
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