A point charge of +Q is placed at the center of
lj 6xw 9 gmj1ey-1puk) a square, and a second point charge of -Q is placed at the upper-left corner. It is observed
1)ej6mgjlx-k y w91 up 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?