A point charge of +Q is placed at the center of a square, and a second point cha
-but leyl 9)l ka)i32jhg, +lcrge of -Q is placed at the u
) lc uyth,ij+k 2ga9le-3 bl)lpper-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 at the lower-left corner?