Physics - Gravitation Question with Solution | TestHub

Since gravitational field is conservative, we can conserve the total mechanical energy of the system of interacting particles. As the net force acting on a closed system is zero, we can conserve the linear momentum of the system. Since the gravitational forces between two interacting particles are action-reaction pair, the net torque experienced by the system about any inertial point is zero. Hence, angular momentum of the system remains constant about any inertial point. A body of mass $\mathrm{m}(\ll \mathrm{M})$ is projected tangentially to earth's surface with a speed ${\mathrm{v}}_0=\sqrt{\frac{4\mathrm{GM}}{3\mathrm{R}}}$.\\