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Total electric force on a particle in an equilatteral triangle

  1. Aug 29, 2010 #1
    Three charged particles are located at the corners of an equilateral triangle. Calculate the total electric force on the 7.00µC charge.
    The three charges are: 7.00µC, 2.00µC, and -4.00µC and they are all 0.500 meters apart. Here's a graphic of the layout:

    I know I have to use Coulomb's law but am having trouble coming up with the answer.
  2. jcsd
  3. Aug 29, 2010 #2
    Yes, use Coulomb's law to calculate the forces. Just don't forget to treat them as vectors when calculating the net force. There's some basic trigonometry involved so it shouldn't be a problem.
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