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JCECE Medical JCECE Medical Solved Paper-2008

  • question_answer
    A block B is pushed momentarily along a horizontal surface with an initial velocity \[v.\]If \[\mu \]is the coefficient of sliding friction between B and the surface, block B will come to rest after a time

    A) \[\frac{v}{g\mu }\]

    B)  \[\frac{g\mu }{v}\]

    C)  \[\frac{g}{v}\]

    D) \[\frac{v}{g}\]

    Correct Answer: A

    Solution :

     Block B will come to rest, if force applied to it will vanish due to frictional force acting between block B and surface, ie, force applied = frictional force ie, \[\mu mg=ma\] or \[\mu mg=m\left( \frac{v}{t} \right)\] or \[t=\frac{v}{\mu g}\]


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