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Punjab Medical Punjab - MET Solved Paper-2005

  • question_answer
    A body is moving along a rough horizontal surface with an initial velocity\[6m/s\]. If the body comes to rest after travelling a distance \[9\,\,m\], then the coefficient of sliding friction will be

    A) \[0.4\]                                  

    B) \[0.2\]

    C) \[0.6\]                                  

    D) \[0.8\]

    Correct Answer: B

    Solution :

    Given:\[u=6m/s,\,\,s=9m,\,\,v=0\] From equation of motion                 \[{{v}^{2}}={{u}^{2}}-2as\]                 \[0={{(6)}^{2}}-2\times a\times 9\]                 \[18a=36\] \[\Rightarrow \]               \[a=2m/{{s}^{2}}\] Coefficient of sliding friction is given by                 \[\mu =\frac{a}{g}\]                 \[=\frac{2}{10}=0.2\]


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