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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Kinetic Friction

  • question_answer
    Assuming the coefficient of friction between the road and tyres of a car to be 0.5, the maximum speed with which the car can move round a curve of 40.0 m radius without slipping, if the road is unbanked, should be            [AMU 1995]

    A)                         25 m/s            

    B)                         19 m/s            

    C)                         14 m/s            

    D)                           11 m/s

    Correct Answer: C

    Solution :

                                \[v=\sqrt{\mu gr}=\sqrt{0.5\times 9.8\times 40}=\sqrt{196}=14\ m/s\]            


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