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!

Net Force of a Charge

  1. May 30, 2013 #1
    1. The problem statement, all variables and given/known data

    The drawing shows three point charges fixed in place. The charge at the coordinate origin has a?
    q1 = +8.50 µC; the other two have identical magnitudes, but opposite signs: q2 = -5.00 µC and q3 = +5.00 µC.

    http://img66.imageshack.us/my.php?image=p1818mv9.gif

    (a) Determine the net force (magnitude and direction) exerted on q1 by the other two charges.

    (b) If q1 had a mass of 1.50 g and it were free to move what would be its acceleration?

    2. Relevant equations

    F12=k|q1||q2|/r2


    F13=k|q1||q2|/r2


    3. The attempt at a solution

    F12= +2.128*1023

    F13= -+2.128*1023

    cos(23°)= Fx/+2.13*10^23

    Fx= 1.96*1023

    cos(23°)= Fy/-2.13*10^23

    Fy= -1.77 *1046

    Before I go any further, I wanted to make sure I am doing this right since I am kind of rusty. If anyone could check, it would be greatly appreciated.

    Thanks in advance!
     
  2. jcsd
  3. May 30, 2013 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    Your attempt does not show any reasoning nor any working - so I cannot tell if you are doing this right or not.

    Note: you can show the image in the post like this:

    [Broken]​

    You look like you've maybe tried to break the forces into x and y components - but why not just draw the vectors head-to-tail? You can see by inspection how their magnitudes and directions are related - which should tell you the direction of the total force without having to do any trig.
     
    Last edited by a moderator: May 6, 2017
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Net Force of a Charge
Loading...