If $g$ is the acceleration due to gravity at the earth's surface and $r$ is the radius of the earth,

Question

If $g$ is the acceleration due to gravity at the earth's surface and $r$ is the radius of the earth, the escape velocity of the body to escape out of the earth's gravitational field is\

Professor PC Thomas Classes · Answer

Escape velocity\ $\mathrm{v}_{\mathrm{e}}=\sqrt{\frac{2 \mathrm{GM}}{\mathrm{R}}}$ $ =\sqrt{2 r g} $