A space ship of mass \( 2 \times 10^{4} \, \text{kg} \) is launched into a circular orbit close to the earth surface. The additional velocity to be imparted to the space ship in the orbit to overcome the gravitational pull will be: (if \( g = 10 \, \text{m} / \text{s}^{2} \) and radius of earth \( = 6400 \, \text{km} \)).
