Question
Consider the Earth-Moon system. If we were to place equal charges on the Earth and the Moon, how large would they need to be for the electrostatic repulsion to counteract the gravitational attraction?
1. $5.1\times 10^{13}\textrm{ C}$
2. $5.7\times 10^{13}\textrm{ C}$
3. $6.7 \times 10^{13}\textrm{ C}$
4. $3.3\times 10^{27} \textrm{ C}$
(b)
Solution Video