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DUMET Medical DUMET Medical Solved Paper-2010

  • question_answer
    An iron block of mass 5 kg is kept on a trolley. If the trolley is being pushed with an acceleration of 5 m/s2, what will be the force of friction between the block and the trolley surface? (Take the coefficient of static friction between the block and the trolley surface to be 0,8).

    A)  Zero  

    B)  5 N   

    C)  4 N   

    D)  25 N

    Correct Answer: D

    Solution :

     Applied force \[=m\times a=5\times 5\] = 25 Limiting friction \[=\mu \,mg=0.8\times 5\times 10\] = 40 For the given condition applied force is very smaller than limiting friction \[\therefore \] Static friction on a body = applied force \[=ma\] \[=5\times 5\] \[=25\,N\]


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