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NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    Starting from the centre of the earth having radius R, the variation of g (acceleration due to gravity) is shown by:

    A)   

    B)  

    C)    

    D)

    Correct Answer: C

    Solution :

    [c] \[g''=\frac{GM}{{{R}^{2}}}\left[ 1-\frac{d}{R} \right]=g\left[ 1-\frac{d}{R} \right]\] \[g'=0\,at\,d=R\] Acceleration due to gravity is zero at earth centre \[For\,r>Rg'\propto \frac{1}{{{r}^{2}}}\] \[For\,r>Rg'=g\left[ 1-\frac{d}{R} \right]=\frac{gr}{R}\] \[g'\propto r\]


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