BCECE Engineering BCECE Engineering Solved Paper-2013

  • question_answer
    The dimensions of universal gravitational constant are

    A) \[[{{M}^{-2}}{{L}^{-3}}{{T}^{-2}}]\]                          

    B)  \[[{{M}^{-2}}{{L}^{2}}{{T}^{-1}}]\]          

    C)  \[[{{M}^{-1}}{{L}^{3}}{{T}^{-2}}]\]          

    D)        \[[M{{L}^{2}}{{T}^{-1}}]\]

    Correct Answer: C

    Solution :

    \[F=\frac{Gm,{{m}_{2}}}{{{r}^{2}}}\] \[\Rightarrow \]               \[G=\frac{F{{r}^{2}}}{{{m}_{1}}{{m}_{2}}}=\frac{[ML{{T}^{-2}}][{{L}^{2}}]}{[{{M}^{2}}]}\] \[=[{{M}^{-1}}{{L}^{3}}{{T}^{-2}}]\]


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