Physics - Current Electricity Question with Solution | TestHub

A particle of mass equal to mass of the earth is projected by an external agency from the surface of earth so that there is no recoil in earth when particle is projected. In this case escape velocity of the particle will be $\sqrt{{\mathrm{kgR}}_{\mathrm{e}}}$, ( $g$ is acceleration due to gravity on the surface of the earth and $R_e=$ radius ofthe earth). Then find the value of $k$ ?