The radii of circular orbits of two satellites A and B of the earth, are 4R and R, respectively. If the speed of satellite A is 3 V, then the speed of satellite B will be :
Answer & explanation
Correct answer: option 3
\(V ∝ \frac{1}{\sqrt{r}}\)
\(\frac{v_1}{v_2} = \frac{\sqrt{r_2}}{\sqrt{r_1}}\)
v2 = 2 v1 = 6 v