A point charge of +Q is placed at
9), ,b7c9,ks t yc xh1rufeiwmthe center of a square, and a second point charge of -Q is placed at the upper-lef
),rxcswhy,1 i 99buckme 7t f,t 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?