Two identical point charges are fixed to diagonally opposite corners of a square that is 0.6 m on a side. Each charge is +2.5 µC. How much work is done by the electric force as one of the charges moves to an empty corner?

Answer 1

work=differenceinpotential*q

The potential starting is kQ/.6(sqrt2)
the potential ending is kQ/.6

work=kq/.6(.707-1)