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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2013

  • question_answer
    A wheel having moment of inertia\[2\text{ }kg-{{m}^{2}}\] about its vertical axis, rotates at the rate of 60 rpm about the axis. The torque Which can stop the wheels rotation in one minute would be

    A)  \[\frac{2\pi }{15}Nm\]                 

    B)  \[\frac{\pi }{12}Nm\]

    C)  \[\frac{\pi }{15}Nm\]                    

    D)  \[\frac{\pi }{10}Nm\]

    Correct Answer: C

    Solution :

                    As\[\tau =I\alpha =I\left( \frac{{{\omega }_{0}}-\omega }{t} \right)\] \[\tau =\frac{2\times 2\pi \times 60}{60\times 60}\] \[=\frac{\pi }{15}N/m\]


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