Physics - Gravitation Question with Solution | TestHub

The correct option is (D). Considering force balance in the orbit: $\frac{\mathrm{GMm}}{{\mathrm{r}}^2}=\frac{{\mathrm{mv}}^2}{\mathrm{r}}$ Gravitational force balances the centrifugal force. The orbital speed can be obtained as: $\mathrm{v}=\sqrt{\frac{\mathrm{GM}}{\mathrm{r}}}$ So, $\sqrt{\frac{\mathrm{GM}}{\mathrm{R}}}=6\mathrm{V}$, which is the orbital speed of the satellite B.