A point charge of +Q is placed at the cen
34oibnavuz,,vz: (e gter 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
n3bzeio vg zv:,(,a4uacts 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?