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AMU Medical AMU Solved Paper-1998

  • question_answer
    Two satellites A and B of equal mass are orbiting earth at altitudes R and 4R where R is the radius of the earth. The ratio of their kinetic energies is

    A)  2                  

    B)  1/4

    C)  4                 

    D)  5/2

    Correct Answer: C

    Solution :

    : Velocity of a satellite\[v=\sqrt{\frac{GM}{r}}\] \[\therefore \]\[\frac{v_{1}^{2}}{v_{2}^{2}}=\frac{{{r}_{2}}}{{{r}_{1}}}\] or \[\frac{2mv_{1}^{2}}{2mv_{2}^{2}}=\frac{4R}{R}=\frac{K{{E}_{1}}}{K{{E}_{2}}}=\frac{4}{1}\]


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