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NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    A weightless thread can withstand tension up to 30N. A stone of mass 0.5kg is tied to it and is revolved in a circular path of radius 2m in a vertical plane. If\[g=10m/{{s}^{2}}\], then the maximum angular velocity of the stone will be:

    A) \[5\,rad/s\]                     

    B) \[\sqrt{30}\,red/s\]

    C) \[\sqrt{60}\,red/s\]                      

    D) \[10\,red/s\]

    Correct Answer: A

    Solution :

    [a] \[T-mg=m{{\omega }^{2}}r\] \[30-0.5\times 10=0.5{{\omega }^{2}}\times 2\] \[30-5={{\omega }^{2}}\] \[25={{\omega }^{2}}\] \[\omega =5rad/\sec \]


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