NEET Sample Paper NEET Sample Test Paper-32

  • question_answer 14) If the escape velocity of a body of mass 2 Kg for a planet is 9 km/sec. Then the potential energy of the body on planet's surface will be:-

    A)  \[-81\,MJ\]          

    B)  \[-81\text{ }KJ\]

    C)  \[-81\text{ }J\]            

    D)  \[~-162\text{ }MJ\]

    Correct Answer: A

    Solution :

    \[Potential\text{ }Energy=-Escupe\,\,Energy\] \[=-\frac{1}{2}m{{v}_{c}}^{2}\] \[=-\frac{1}{2}\,(2)\,\,\,{{(9\times {{10}^{3}})}^{2}}\] \[=-81\times {{10}^{6}}\,J\]

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