A point charge of +Q is placed at the c
pjdrqe 2-ozzj2tym ,p2j1, r 9enter of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an e
zr9j 2r-dq2 y,1e2ojj ,tmz pplectrostatic 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?