A point charge of +Q is placed at the center of
j,2j3 s +ja3; ksducuc 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 acts on the positive charge at the center. What is the magnitude of the force that act
u sd j2k;sau3,cjj3c+ s on the center charge if a third charge of -Q is placed at the lower-left corner?