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Electric Field homework help

  1. Jun 9, 2013 #1
    1. The problem statement, all variables and given/known data
    Find the direction of E at rho where is the electric field

    http://i.imgur.com/37ohyME.jpg


    2. Relevant equations

    F=KQq/r^2


    3. The attempt at a solution

    I thought I might just have a vector pointing right from the +2Q and another pointing up from the +3Q and just add those two vectors together but I'm not sure.
     
  2. jcsd
  3. Jun 9, 2013 #2

    tiny-tim

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    hi bryanwalsh! welcome to pf! :smile:

    (try using the X2 button just above the Reply box :wink:)
    that's correct … electric fields are vectors, so they add like vectors :smile:
     
  4. Jun 10, 2013 #3
    So which way would the direction vector face? Southeast?
     
  5. Jun 10, 2013 #4
    So which way would the direction vector of the electric field face? Southeast?
     
  6. Jun 10, 2013 #5

    tiny-tim

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    maybe yes and maybe no :wink:

    tell us why you think it's southeast (with equations), and then we'll comment :smile:
     
  7. Jun 10, 2013 #6
    Gysk3Ri.png
     
  8. Jun 11, 2013 #7

    tiny-tim

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    (just got up :zzz:)

    if one vector is up, and the other is horizontal, how can the resultant be down?? :redface:

    you need to draw a much better diagram, with arrows to show which way the vectors are going

    or, preferably, use components
     
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