A point charge of +Q is placed at the centroid of an equi
w ot+)+rqraq(4/hhsd6 jnr ,tlateral 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 is the magnitude of the force that a
h )qstrnr 4++haqot, rjd6/ w(cts on the center charge due to a third charge of +Q placed at one of the other vertices?