A) \[6\upsilon \]
B) \[9\upsilon \]
C) \[3\upsilon \]
D) none of these
Correct Answer: A
Solution :
Orbital speed of sattelite\[\upsilon =\sqrt{\frac{GM}{r}}\] \[\therefore \] \[\frac{{{\upsilon }_{1}}}{{{\upsilon }_{2}}}=\sqrt{\frac{{{r}_{2}}}{{{r}_{1}}}}\] \[\frac{3\upsilon }{{{\upsilon }_{2}}}=\sqrt{\frac{R}{4R}}\Rightarrow \frac{3\upsilon }{\upsilon }=\frac{1}{2}\] \[{{\upsilon }_{2}}=6\upsilon \]
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