Physics - Gravitation Question with Solution | TestHub

A particle of mass ' $\mathrm{m}$ ' is kept at rest a height $3\mathrm{R}$ from the surface of earth, where ' $R$ ' is radius of earth and ' $M$ ' is the mass of earth. The minimum speed with which it should be projected upward, so that it does not return back is ( $\mathrm{g}=$ acceleration due to gravity on the earth's surface)