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Homework Help: Electric Charge Question 2

  1. Jan 18, 2008 #1
    1. The problem statement, all variables and given/known data

    http://img155.imageshack.us/img155/5661/q2gf2.jpg [Broken]

    3. The attempt at a solution

    I got the first part of the question correct but for some reason I can't get the second one. I know I did it correctly but its not working.

    All the forces acting on particle 2 are from particle 1, 3, and 4. I calculated the forces and added them up but I still am not getting the right answer. I tried both negative and positive answer for the same number and still it says I am wrong.
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Jan 18, 2008 #2


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    you have still not said anything about the results of your procedures. Then how can we tell you where you did wrong?
  4. Jan 18, 2008 #3
    F2 = F21 + F23 + F24

    F21 = Kq1q2/d^2 (convert d to meters first)
    F23 = Kq2q3/d^2 (convert d to meters first)

    F24 = Kq2q4/(2*d)^2 (convert d to meters first)

    Also I am not sure if the final answer is suppose to be negitive or postive.
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