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Electric Force and Field Strength Problem

  1. Feb 19, 2013 #1
    Three charges are located on a coordinate plane scaled off in meters. Charge #1 is 5 nC and located at (0,0). Charge #2 is -3.0 nC and located at (0,-.10). Charge #3 is 6.0 nC and is located at (-3,0).
    a) What is the net force (magnitude and direction) on the charge at the origin?
    b) What is the electric field strength om the charge at the origin?


    I have many ideas as to how I could start this but I'm not quite sure... I think I'm over thinking it. Any help would be much appreciated!
     
  2. jcsd
  3. Feb 19, 2013 #2
    From what I remember don't you have to use:
    [tex]F=\frac{q_{1}q_{2}}{4\pi\varepsilon_{0}r^{2}}[/tex]

    For a?
     
  4. Feb 20, 2013 #3
    The best way to start is by drawing a diagram showing all the charges.
    Then draw arrows showing the direction of the forces on the charge at the origin.
     
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