Physics - Gravitation Question with Solution | TestHub

Earth has mass ' ${\mathrm{M}}_1{}^{\prime }$ and Radius ' ${\mathrm{R}}_1{}^{\prime }$. Moon has mass ${}^{\prime }{\mathrm{M}}_2{}^{\prime }$ and radius ${}^{\prime }{\mathrm{R}}_2{}^{\prime }$. Distance between their centres is ' ${\mathrm{r}}^{\prime }$. A body of mass ' ${\mathrm{M}}^{\prime }$ is placed on the line joining them ata distance $\frac{\mathrm{r}}{3}$ from centre of the earth. To project the mass ' ${\mathrm{M}}^{\prime }$ to escape to infinity, the minimum speed required is