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: Balancing four point charges so that the net force acting on each charge is 0.

  1. Jan 24, 2010 #1
    1. The problem statement, all variables and given/known data

    Find positions of four charges in a plane (+1C, -1C, +2C, -2C) that result in an equilibrium (zero net force on each charge). Report positions as four (x,y) pairs.

    2. Relevant equations

    F = [tex]\frac{k_{e}q_{1}q_{2}}{r^{2}}[/tex]

    3. The attempt at a solution

    I had no idea where to start. It seemed to me that regardless of where I put the charges there would be a net force.
     
  2. jcsd
  3. Jan 24, 2010 #2
    In your equation of the force between two charges, when does the force tend toward zero?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook