Question

Two satellites S 1 and S 2 are revolving in circular orbits around a planet with radius R 1 = 3200 km and R 2 = 800 km respectively. The ratio of speed of satellite S 1 to the speed of satellite S 2 in their respective orbits would be 1/x where x =

Answer 1

$v=\sqrt\frac{GM}{R}$

$⇒\frac{v_1}{v_2}=\sqrt\frac{R_2}{R_1}$

$\frac{v_1}{v_2}=\sqrt\frac{3200}{800}=2$

$⇒\frac{v_1}{v_2}=\frac{1}{2}$

x = 2