Final answer:
The net force on the charge at the center of the square is 0.
Step-by-step explanation:
The net force on the charge at the center of the square can be calculated using Coulomb's Law. Since the charges at the corners of the square are at equal distances from the center, the forces they exert on the charge at the center cancel out, resulting in a net force of zero. Therefore, the net force on the charge at the center of the square is most nearly A 0.