JEE Main & Advanced Sample Paper JEE Main Sample Paper-19

  • question_answer An insect trapped in a circular groove of radius\[12\text{ }cm\]. Moves along the groove steadily and completes 7 revolutions in 100 sec. What is the linear speed of the motion

    A)  \[2.3\text{ }cm/sec,\]           

    B)  \[5.3\text{ }cm/sec.\]

    C)  \[0.44\text{ }cm/sec,\]         

    D)  None of these

    Correct Answer: B

    Solution :

     This of example of uniform circular motion. \[\omega =\frac{2\pi }{T}=2\pi n=2\pi \times \frac{7}{100}=0.44rad/\sec .;\] \[V=R\omega =0.44\times 12=5.3cm/\sec \].

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