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

  • question_answer
    Orbital velocity of earth's satellite near the surface is 7 km/s. When the radius of the orbit is 4 times than that of earth's radius, then orbital velocity in that orbit is [EAMCET (Engg.) 1995]

    A) 3.5 km/s

    B)               7 km/s

    C)             72 km/s           

    D)             14 km/s

    Correct Answer: A

    Solution :

                    \[v\propto \frac{1}{\sqrt{r}}.\] If orbital radius becomes 4 times then orbital velocity will become half. i.e. \[\frac{7}{2}=3.5\ km/s\]


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