Question

A satellite is moving with a constant speed $V$ in a circular orbit about the earth. An object of mass $m$ is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

• A. $\frac{3}{2}m{V}^2$
• B. $\frac{1}{2}m{V}^2$
• C. $2m{V}^2$
• D. $m{V}^2$

Answer 1

The correct option is D $m{V}^2$

To escape speed $V_e={\sqrt{2V}}_{orbital}$.