NTSE Sample Paper NTSE SAT Practice Test-7

  • question_answer
    Which of the following units can be used to correctly express universal gravitational constant ?

    A) \[N{{m}^{-2}}k{{g}^{-2}}\]              

    B) \[N{{m}^{2}}k{{g}^{2}}\]

    C) \[kg\,{{m}^{3}}{{s}^{-2}}\]              

    D) \[k{{g}^{-1}}\,{{m}^{3}}{{s}^{-2}}\]

    Correct Answer: D

    Solution :

    [d] \[F=\frac{G\,\,{{m}_{1}}\,\,{{m}_{2}}}{{{r}^{2}}}\] Units of G: Nm2 kg-2 = kg ms-2 x m2 x kg-2 =kg-1 m3 s-2


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