RAJASTHAN ­ PET Rajasthan PET Solved Paper-2006

  • question_answer
    The earth of mass\[6\times {{10}^{24}}\]kg. with\[2\times {{10}^{-7}}\]rad/s angular velocity is moves around the sun at \[15\times {{10}^{8}}\]km radius. The force on the earth by sun is

    A)  zero           

    B)  \[16\times {{10}^{24}}N\]

    C)  \[25\times {{10}^{16}}N\]

    D)  \[36\times {{10}^{21}}N\]

    Correct Answer: D

    Solution :

     \[F=mR{{\omega }^{2}}\] \[=(6\times {{10}^{24}})\times (1.5\times {{10}^{8}}\times {{10}^{3}})\times {{(2\times {{10}^{-7}})}^{2}}\] \[=36\times {{10}^{21}}N\]


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