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NEET Sample Paper NEET Sample Test Paper-60

  • question_answer
    The height vertically above the earth's surface at which the acceleration due to gravity becomes 1% of its value at the surface is:

    A) 8R                   

    B) 9R    

    C) 10R                  

    D) 20R

    Correct Answer: B

    Solution :

    [b] \[g=\frac{GM}{{{R}^{2}}}...(1)\] \[g''=\frac{g}{100}\] \[g''=\frac{GM}{{{(R+H)}^{2}}}\] \[\frac{g}{100}=\frac{GM}{{{(R+H)}^{2}}}...(2)\] by (1) & (2)  \[100={{\left[ \frac{R+H}{R} \right]}^{2}}\] \[\frac{R+H}{R}=10\] \[R+H=10R\] \[H=9R\]


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