A body is moving in a low circular orbit about a planet of mass \(M\) and radius \(R\). The radius of the orbit can be taken to be \(R\) itself. Then the ratio of the speed of this body in the orbit to the escape velocity from the planet is:
1. \(\sqrt{2}\)
2. \(\frac{1}{\sqrt{2}}\)
3. \(2\)
4. \(1\)

Subtopic:  Orbital velocity |
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The mass and radius of orbit for the two satellites are \((m,r)\) and \((3m, 3r)\) respectively. What will be the ratio of their orbital velocity about the earth?
1. \(\sqrt 3 :1\)                   2. \(1 : \sqrt 3 \)                  
3. \(\sqrt 2 :1\) 4. \(1:2\)
Subtopic:  Orbital velocity |
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