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Homework Help: Force magnitude charges!

  1. Jul 8, 2009 #1
    1. The problem statement, all variables and given/known data

    What is the force on the q1 charge? (a=3.41 cm, b=5.45 cm, q1=5.63 nC, q2=9.65 nC, q3=-5.93 nC.) Give your answer as a magnitude.

    2. Relevant equations


    3. The attempt at a solution


    What am I doing wrong?
  2. jcsd
  3. Jul 8, 2009 #2


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    Homework Helper

    Angle between F2 and y-axis not 45 degrees.
    Take the components of F2 on x-axis and y-axis.
    Find the resultant of F1 and x component. Then find the resultant of this and y=component.
  4. Jul 8, 2009 #3
    I am not sure what you mean. do you mean tan(theata)= F2/F1....?
  5. Jul 9, 2009 #4


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    Homework Helper

    tanθ =a/b where a is the distance between q1 and q3 and b is the distance between q2 and q3
  6. Jul 9, 2009 #5


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    Science Advisor

    You tell us that "a=3.41 cm, b=5.45 cm" but there is no "a" or "b" in your picture. I believe that rlbhat is assuming that that they are the x and y coordiantes of a2. Is that the case?
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