1. Not finding help here? Sign up for a free 30min 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!

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

    F=K(q1q2/R^2)



    3. The attempt at a solution

    0708092044-1.jpg

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

    rl.bhat

    User Avatar
    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

    rl.bhat

    User Avatar
    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

    HallsofIvy

    User Avatar
    Staff Emeritus
    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?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook