If r represents the radius of the orbit of a satellite of mass m moving round a planet of mass M the velocity of the satellite is given by Kepler's Law

  • v2 = GMmrv^2\ =\ \frac{GMm}{r}v2 = rGMm​
  • v2 = gMRv^2\ =\ \frac{gM}{R}v2 = RgM​
  • v=\frac{GMm}{r^2} v= r 2 GMm ​
  • V= ( r GM ​ ) ​
Answer: V= ( r GM ​ ) ​
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