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VMMC VMMC Medical Solved Paper-2010

  • 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)  \[v/(g\mu )\]   

    B)  \[g\mu /v\]

    C)  \[g/v\]                

    D)         v/g

    Correct Answer: A

    Solution :

    Fraction is the retarding force for the block \[F=ma=\mu R\] \[=\mu mg\] Retardation \[a=\mu g\] From first equation to motion \[v=u-at\] \[0=v-\mu g\times t\] \[t=\frac{v}{g\mu }\]


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