A point charge of +Q is placed at the
1dla8 moxw8y15a u1t,,qk s:hlty4zj center of a square, and a second point charge of -Q is placed at the upper-lef
u lyqtzl1ds 1,wjyk8t85o1 ,4amx:h at 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 acts on the center charge if a third charge of -Q is placed at the lower-left corner?