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Homework Help: More Electrical Forces

  1. Feb 7, 2005 #1
    Three charges are at the corners of an equilateral triangle with angles 60 degrees (q = 3.00 µC, L = 0.800 m).

    (a) Calculate the electric field at the position of charge q due to the 7.00 µC and -4.00 µC charges.

    >> I thought I had this right. Not sure why it isn't working!! Okay, I used E=ke(|q1|/r^2). I did this twice, for both charges. Then I broke it into x and y components and added the two together and got an answer of 105 i + 85.1 j kN/C.

    The only thing I can think of is that I messed up a sign somewhere?? But I'm pretty sure they should all be positive...
  2. jcsd
  3. Feb 7, 2005 #2

    Doc Al

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    Staff: Mentor

    One thing to consider: The specific answer depends on which charge is at which corner, and where the corners are located.
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