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Question: Answered & Verified by Expert
A satellite $S_1$ of mass $m$ is moving in an orbit of radius $r$. Another satellite $S_2$ of mass $2 \mathrm{~m}$ is moving in an orbit of radius $2 r$. The ratio of time period of satellite $S_2$ to that of $S_1$ is
PhysicsGravitationMHT CETMHT CET 2022 (08 Aug Shift 1)
Options:
  • A 2:1
  • B 1:8
  • C 1:4
  • D $2 \sqrt{2}: 1$
Solution:
2327 Upvotes Verified Answer
The correct answer is: $2 \sqrt{2}: 1$
According to Kepler's Law of periods:
$T^2 \propto R^3$
Therefore,
$\frac{T_2}{T_1}=\left(\frac{2 r}{r}\right)^{\frac{3}{2}}=\frac{2 \sqrt{2}}{1}$

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