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NEET Sample Paper NEET Sample Test Paper-88

  • question_answer
    Two bodies of masses 10 kg and 100 kg are separated by a distance of 2m \[(G=6.67\times {{10}^{-11}}N{{m}^{2}}k{{g}^{-2}}).\] The gravitational potential at the mid-point on the line joining the two is

    A) \[7.3\times {{10}^{-7}}J/kg\]

    B)        \[7.3\times {{10}^{-9}}J/kg\]

    C) \[-7.3\times {{10}^{-9}}J/kg\]

    D)        \[7.3\times {{10}^{-6}}J/kg\]

    Correct Answer: C

    Solution :

    [c] \[{{V}_{g}}=\frac{-6.67\times {{10}^{-11}}\times 10}{1}-\frac{6.67\times {{10}^{-11}}\times 100}{1}\] \[=-6.67\times {{10}^{-10}}-6.67\times {{10}^{-9}}\] \[=-6.67\times {{10}^{-10}}\times 11=7.3\times {{10}^{-9}}\,J/kg\]


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