EAMCET Medical EAMCET Medical Solved Paper-1999

  • question_answer
    The escape velocities on two planets of masses m1 and m2 having same radius, are v1 and v2 respectively, Then:

    A)  \[\frac{{{v}_{1}}}{{{v}_{2}}}=\frac{{{m}_{1}}}{{{m}_{2}}}\]                                           

    B)  \[\frac{{{v}_{2}}}{{{v}_{1}}}=\frac{{{m}_{1}}}{{{m}_{2}}}\]

    C)  \[\frac{{{v}_{1}}}{{{v}_{2}}}={{\left( \frac{{{m}_{1}}}{{{m}_{2}}} \right)}^{2}}\]                  

    D)  \[\frac{{{v}_{1}}}{{{v}_{2}}}=\sqrt{\frac{{{m}_{1}}}{{{m}_{2}}}}\]

    Correct Answer: D

    Solution :

                     The escape velocity on a planet is given by \[{{v}_{es}}=\sqrt{\frac{GM}{R}}\Rightarrow {{v}_{es}}\propto \sqrt{m}\] (since, radius is same) Hence,    \[\frac{{{v}_{1}}}{{{v}_{2}}}=\sqrt{\frac{{{m}_{1}}}{{{m}_{2}}}}\]


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