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Uttarakhand PMT Uttarakhand PMT Solved Paper-2011

  • question_answer
    A 500 kg horse pulls a cart of mass 1500 kg along a level road with an acceleration of\[1\text{ }m/{{s}^{2}}\]. If the coefficient of sliding friction is 0.2, then the horizontal force exerted by the earth on the horse is

    A)  300 kg wt       

    B)  400 kg wt

    C)  500 kg wt       

    D)  600 kg wt

    Correct Answer: D

    Solution :

     \[F={{f}_{k}}=ma\] \[F={{f}_{k}}+ma\] \[F=\mu mg+ma\] \[f=m(\mu g+a)\] \[\therefore \] \[F=(500+1500)\text{ }(0.2\times 10+1)\] \[F=6000\text{ }N\] \[F=600\text{ }kg-wt\]


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