Question

For an object orbiting earth close to its surface to escape earth's gravitational pull, its orbital velocity has to increase by a factor of

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

For any body to escape the earth gravitational field, it should be given escape speed
$\frac{V_e}{V_o}=\sqrt{2}$
$V_e=\sqrt{2}{V}_o$