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NEET Sample Paper NEET Sample Test Paper-44

  • question_answer
    The ratio of acceleration due to gravity at a height 3R above earth's surface to the acceleration due to the gravity on the surface of the earth is:

    A) \[\frac{l}{9}\]                           

    B) \[\frac{\operatorname{l}}{4}\]    

    C) \[\frac{\operatorname{l}}{16}\]                          

    D) \[\frac{\operatorname{l}}{3}\]

    Correct Answer: C

    Solution :

    Acceleration due to gravity \[\operatorname{g}=\frac{GM}{{{R}_{e}}^{2}}\]                                 ?(1) \[\operatorname{g}''=\frac{GM}{{{\left( {{\operatorname{R}}_{e}}+H \right)}^{2}}}\] \[\operatorname{g}''=\frac{1}{16}\frac{GM}{{{\operatorname{R}}_{e}}^{2}}\]                          ?.(2) By (1) and (2) \[\frac{g}{g''}=\frac{1}{16}\]


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