A point charge of +Q is placed at the centroid of an equilateral triangle.
il,;p es4+cj 9a r)saz When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on it. What is the
psa;9lc ),4 jersiz+a magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?