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CMC Medical CMC-Medical VELLORE Solved Paper-2007

  • question_answer
    A car of mass 1000 kg moves on a circular track of radius 20 m. If the coefficient of friction is 0.64, then the maximum velocity with which the car can move is

    A)  22.4 m/s                             

    B)  5.6 m/s

    C)  11.2 m/s                             

    D)  none of these

    Correct Answer: C

    Solution :

                    Maximum velocity of the car is given by \[v=\sqrt{\mu rg}\] Given \[\mu =0.64,\] \[r=20\text{ }m\] \[\therefore \] \[v=\sqrt{0.64\times 20\times 10}=\sqrt{0.64\times 200}\]                 \[=\sqrt{128}=11.2\,m\text{/}s\]


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