A point charge of +Q is pl
ni3 (olb 7any m.7blm-aced at the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the 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
amymb3ln7bil o(-.n7 at the lower-left corner?