A point charge of +Q i
ra2z 6t -tg 2ws0gii6us placed at the center 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 acts on the positive charge at the center. What is
6u 60 arti ig-stg2w2zthe magnitude of the force that acts on the center charge if a third charge of -Q is placed at the lower-left corner?