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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    A particle moves in a circle of radius 20 cm. Its linear speed is given by \[v\,\,=\,\,2t\] where t is in second and v in m/s. The radial acceleration at \[t\,\,=\,\,3s\] is-

    A) \[180\text{ }m/{{s}^{2}}\]                   

    B) \[2\text{ }m/{{s}^{2}}\]

    C) \[6\text{ }m/{{s}^{2}}\]                      

    D) none

    Correct Answer: A

    Solution :

    \[at\text{ }t\,\,=\,\,3s\] \[v\,\,=\,\,6\,\,m/s\] \[{{a}_{r}}=\,\,\frac{{{v}^{2}}}{r}\,\,=\,\,180\,m/{{s}^{2}}\]


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