A point charge of +Q is placed at the centroid of an equilateral triangle.
:x odpfixyta z s)nd+(/.0s0aWhen a second charge of +Q is placed at on
s:yfd0 z+.sp/xo n)atx 0 (iade of the triangle's vertices, an electrostatic force of 4.0 N acts on it. What is the magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?