In the figure, three point charges are arranged in a equilateral triangle of side a= 1.40×10-2 m. Sketch the field lines due to + Q and -Q, where Q = 2.50×10-5 C , and from them determine the direction of the force that acts on +q = 5.00×10-8 C because of the presence of the other two charges. What is the x-component of the force? What is the y-component of the force?
The Attempt at a Solution
I know that the y-component is 0 N.
Someone posted this problem in yahoo answers, and I tried to follow it. Something went wrong along the way, but here is the work from that solution:
*+Q=1, -Q=2, +q=3*
F1,3x=0.803(cos(30 degrees))=0.6951 (right)
Here, I have the problem where if you combine x and y values, the answer is 0 for both of them.
Where did I go wrong, or is all of this wrong?