Question

the speed of revolution of an artificial satellite revolving close to the surface of the earth is 8 km s . what will be the escape velocity for a body on the earth ?

Answer 1

Dear student

the relation between Orbital velocity and escape velocity is
$$\begin{gathered} v_e=\sqrt{2}{v}_o \\ so{v}_e=\sqrt{2}\times 8Km/s \\ {v}_e=11.31Km/s \end{gathered}$$