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9th Class Science Gravitation and Floatation Question Bank Gravitation Conceptive Objective Problems

  • question_answer
    Ratio of g value at a depth \[{}^{R}/{}_{5}\]. to a depth \[{}^{R}/{}_{10}\] from the surface of the earth is

    A)  \[\frac{5}{10}\]                               

    B)  \[\frac{2}{1}\]

    C)  \[\frac{8}{9}\]                  

    D)  \[\frac{9}{8}\]

    Correct Answer: C

    Solution :

       \[\frac{{{g}_{d1}}}{{{g}_{d2}}}=\frac{1-\frac{{{d}_{1}}}{R}}{1-\frac{{{d}_{2}}}{R}}=\frac{R-{{d}_{1}}}{R-{{d}_{2}}}=\frac{\frac{4R}{5}}{\frac{9R}{10}}=\frac{40}{45}=\frac{8}{9}\]


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