A point charge of +Q is placed at the center of a
myntsy 7 hap7zhy9s)7e. 6z)esquare, and a second point charge of -Q is placed at the upper-left corner. It is observed t
m9 7 stey) .h sazhpy)nyz767ehat an electrostatic 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?