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BCECE Medical BCECE Medical Solved Papers-2013

  • question_answer
    A weigthtless thread can bear tension up to 3.7 kg wt. A stone of mass 500 g is tied to it and revolved in a circular path of radius 4m in a vertical plane. If \[g=10\,m/{{s}^{2}}\], then the maximum angular velocity of the stone will be

    A)  2 rad/s              

    B)  4 rad/s

    C)  16rad/s             

    D)  \[\sqrt{21}\] rad/s

    Correct Answer: B

    Solution :

    Maximum tension \[=\frac{m{{v}^{2}}}{r}+mg\] \[3.7\times 10=\frac{0.5{{v}^{2}}}{4}+0.5\times 10\] \[\Rightarrow \] \[v=16\,m/s\] \[\therefore \] \[\omega =\frac{v}{r}=\frac{16}{4}=4\]rad/s


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