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JEE Main & Advanced Physics Gravitation / गुरुत्वाकर्षण Question Bank Motion of Satellite

  • question_answer
    The orbital speed of an artificial satellite very close to the surface of the earth is \[{{V}_{o}}\]. Then the orbital speed of another artificial satellite at a height equal to three times the radius of the earth is                            [Kerala (Engg.) 2001]

    A)             \[4\,{{V}_{o}}\]        

    B)             \[2\,{{V}_{o}}\]

    C)             \[0.5\,{{V}_{o}}\]     

    D)             \[4\,{{V}_{o}}\]

    Correct Answer: C

    Solution :

                    \[v\propto \frac{1}{\sqrt{r}},\] If \[r=R\] then \[v={{V}_{0}}\] If \[r=R+h=R+3R=4R\]then \[v=\frac{{{V}_{0}}}{2}=0.5{{V}_{0}}\]


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