A point charge of +Q is placed at the centroid of an eq
-e( ,apiq mkde9go*n5uilateral triangle. 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
q5e(oed*p- agmn9, kiis 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?