A point charge of +Q is placed at the centroid of an equilateral triangle. When
muaz2vrv+ -3hp 3pc2x 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 magnitude of the force that acts on the center charge due to
urp2va- 2+hz 33cpmxva third charge of +Q placed at one of the other vertices?