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AMU Medical AMU Solved Paper-2000

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

    A)  6000 N                                

    B)  5000 N

    C)  4000 N                                

    D)  3000 N

    Correct Answer: A

    Solution :

                     Equation of motion of horse is \[F-f=Ma\] or            \[F=Ma+f\] Force of friction                 \[f={{\mu }_{k}}\,N={{\mu }_{k}}=\,Mg\] So,          \[F=Ma+{{\mu }_{k}}\,kg\]                 \[=M\,(a+{{\mu }_{k}}g)\] \[\therefore \]  \[F=(500+1500)\,(1+0.2\times 10)\] \[\Rightarrow \]               F = 6000 N


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