A point charge of +Q is placed at the center of a square, and a second p
rswo-b0/xa hnzot) 1*(l2y)mj3xdtm oint charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on
n 1a0h*xs- (rlmb) wyxdmtz3/o2ot)jthe positive charge at the center. What is the magnitude of the force that acts on the center charge if a third charge of -Q is placed at the lower-left corner?