JIPMER Jipmer Medical Solved Paper-1998

  • question_answer
    The kinetic energy acquired by a mass m after travelling a fixed distance from rest under the action of constant force is:

    A)  directly proportional to\[\sqrt{m}\]

    B)  directly proportional to \[\frac{1}{\sqrt{m}}\]

    C)  directly proportional tom

    D)  independent of m

    Correct Answer: D

    Solution :

    Not Available Using the conservation of angular momentum \[{{I}_{1}}{{\omega }_{1}}={{I}_{2}}{{\omega }_{2}}\] Here      \[{{\omega }_{1}}=\omega ,\]                    \[{{\omega }_{2}}=?\] \[\frac{M{{r}^{2}}\cdot \omega }{2}=\left( \frac{M+m+m}{2} \right){{r}^{2}}\omega \] So,          \[{{\omega }_{2}}=\frac{M\omega }{M+2m}\]


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