Question

Two satellites of mass $m$ and $2m$ are revolving in two circular orbits of radii $r$ and $2r$ around an imaginary planet, on the surface of with gravitational force is inversely proportional to distance from its centre. The ratio of orbital speed of satellite is :

• A. $1:1$
• B. $1:2$
• C. $2:1$
• D. $1:\sqrt{2}$

Answer 1

Answer: (A)

The correct option is A $1:1$
from the figure, centripetal force,