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  3. JAMIA MILLIA ISLAMIA

JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2005

  • question_answer
        The minimum velocity (in\[m{{s}^{-1}}\]) with which a car driver must traverse a flat curve of radius 150m and coefficient of friction 0.6 to avoid skidding is:

    A)  60                                         

    B)  30

    C)  15                                         

    D)  25

    Correct Answer: B

    Solution :

                    Using the relation \[\frac{m{{v}^{2}}}{r}=\mu R,\]                 \[{{v}^{2}}=mg\] \[\frac{m{{v}^{2}}}{r}=\mu mg\]               or            \[{{v}^{2}}=\mu rg\] Or           \[{{v}^{2}}=30\,m/s\]


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