A point charge of +Q is placed at the center of a square, and a second poin
iiy(r m:.5/x x8a d 21aibimnft charge of -Q is placed at the upper-left corner. It is observed that an electro
anm ir:i 8ia/5.m2x b1xy(dfistatic 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?