1. The problem statement, all variables and given/known data Supppose that electrical attraction, rather than gravity were responsible for holding the moon in orbit around the earth. If equal and opposite charges Q were placed on the earth and the Moon, What should be the value of Q to maintain the present orbit? Treat the Earth and Moon as point particles 2. Relevant equations Mass of earth: 5.97x1024kg Mass of moon: 7.35x1022kg radius of orbit: 3.84x108m Fg=Gm1m2 / d2 Fe= kq1q2 / d2 3. The attempt at a solution Well I know to start by finding the force of gravity, but from there i am unsure about how to do this problem. Could someone please help?