A point charge of +Q is placed at the center of a square, a
i 7nm/bor5xp.p9/f97p wmecb nd 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.
eri 7pmnf x 9cw9.o/ppm/5b 7b 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?