Question

The orbital velocity of satellite at a height R above the surface of Earth is v . The escape velocity from that location is

• A. $\sqrt{2}\nu$
• B. $2\nu$
• C. $4\nu$
• D. none of these

Answer 1

The correct option is A

$\sqrt{2}\nu$

$v_e=\sqrt{\frac{2GM}{r}}\Rightarrow \sqrt{2}\sqrt{\frac{GM}{r}}=\sqrt{2}\nu$