1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    User Avatar

    Staff: Mentor

    One thing to consider: The specific answer depends on which charge is at which corner, and where the corners are located.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook