The critical velocity required for a satellite to revolve in a given orbit depends on which of the following?

1. From $\dfrac{mv_c^2}{R+h} = \dfrac{GMm}{(R+h)^2}$, the satellite mass $m$ cancels from both sides. 2. This leaves $v_c = \sqrt{\dfrac{GM}{R+h}}$, which contains only $G$, the earth's mass $M$, and the orbital radius $R+h$. 3. So the critical velocity does not depend on the satellite's own mass (rule out options naming mass). 4. It depends on the orbit radius $R+h$. Hence option A is correct. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 10 "Space Missions", p.147_