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Doctors Medicines MCQs Q&A

  1. T2 = kr3
  2. A = ½ r2 dθ/dt
  3. F = GMm/r2
  4. None of these
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1 Answers

Option 1 : T2 = kr3

We know the centripetal force acting on the planet for its circular motion,

F = Mrω2

According to Kepler’s law of periods, T2 = kr3

Then F ∝ m/r2

From this relation we get, F = GMm/r2

Where G is the gravitational constant.
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