# Electric Force magnitude and direction

1. Sep 8, 2008

### trueplaya

1. The problem statement, all variables and given/known data

Three charges are arranged as shown in the picture above. Find the magnitude and direction of the electrostatic force on the 6 nC charge.

The direction I am looking for is the angle that the resultant force makes with the positive x-axis. Do not include units for the angle and make sure you input answers for the angle in degrees.

2. Relevant equations

F= k(q1)(q2)/r^2

3. The attempt at a solution

I have that you break up the equation into F13 and F23, or so I believe.
I say the top charge is 1 and bottom is 2.
The F13= 2.28E-7 N
The F23= 1.52E-7 N
I'm stuck from this point on, I think you must use tangent function to find angle but I do not know which angles to use. Any help thank you.

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2. Sep 8, 2008

### Redbelly98

Staff Emeritus
Welcome to Physics Forums trueplaya.

Can you get the angles for F13 and F23 individually?