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NEET Sample Paper NEET Sample Test Paper-67

  • question_answer
    The earth \[(mass\,\,=\,\,6\times {{10}^{24}}\,kg)\] revolves round the sun with angular velocity \[2\times {{10}^{-7}}\,rad/\sec \] in a circular orbit of radius\[1.5\,\,\times \,\,{{10}^{8}}km\]. The force exerted by the sun on the earth in nektons, is

    A) \[18\,\,\times \,\,{{10}^{25}}\]              

    B) zero

    C) \[27\,\,\times \,\,{{10}^{39}}\]              

    D) \[36\,\,\times \,\,{{10}^{21}}\]

    Correct Answer: D

    Solution :

    \[m=6\times {{10}^{24}}\,kg,\,\,\omega =2\times {{10}^{-}}^{7}\,rad/sec\] \[R=1.5\times {{10}^{11}}\,m\] The force exerted by the sun on the earth \[F=m{{\omega }^{2}}R\] By substituting the value, we can get \[F=36\times 1{{0}^{21}}N\]


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