A point charge of +Q is placed at the center of a square, and
d,a dwqy r/8s1o9e++hiaydpy1 do4 f1u6q( cta second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic for
8/1o(y +ydadsa9 i q p6f1d,oeh1rwydt +4cquce 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?