College Physics (4th Edition)

The ratio $~~\frac{U_{perigee}}{U_{apogee}}~~~$ is equal to $~~2$
We can find the ratio of $\frac{U_{perigee}}{U_{apogee}}$: $\frac{U_{perigee}}{U_{apogee}} = \frac{-\frac{G~M_E~m}{2~R_E}}{-\frac{G~M_E~m}{4~R_E}}$ $\frac{U_{perigee}}{U_{apogee}} = \frac{4~R_E}{2~R_E}$ $\frac{U_{perigee}}{U_{apogee}} = 2$ The ratio $~~\frac{U_{perigee}}{U_{apogee}}~~~$ is equal to $~~2$.