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JEE Main & Advanced Physics Two Dimensional Motion Question Bank Uniform Circular Motion

  • question_answer
    An athlete completes one round of a circular track of radius 10 m in 40 sec.  The distance covered by him in 2 min 20 sec is                                   [Kerala (Med.) 2002]

    A)             70 m   

    B)             140 m

    C)             110 m

    D)                      220 m

    Correct Answer: D

    Solution :

                    Time period = 40 sec No. of revolution\[=\frac{\text{Total time}}{\text{Time period}}\]\[=\frac{140\,\sec }{40\,\sec }=3.5\,Rev\]. So, distance\[=3.5\times 2\pi R=3.5\times 2\pi \times 10=220\,m\].


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