Question

Two satellites X and Y are moving in circular orbits of radii R and 2R respectively, around the same planet. What is the ratio of their critical velocities ?
A. `sqrt(2) : 1`
B. `sqrt(3) : 1`
C. `1 : (1)/(sqrt(2))`
D. `1 : 2`

Answer 1

Correct Answer - A
`(V_(x))/(V_(y))=sqrt((GM)/(R )xx(2R)/(GM))=sqrt(2)`