JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Kinetic Friction

  • question_answer
    On the horizontal surface of a truck (m = 0.6), a block of mass 1 kg is placed.  If the truck is accelerating at the rate of 5m/sec2 then frictional force on the block will be [CBSE PMT 2001]          

    A)                   5 N            

    B)             6 N

    C)             5.88 N

    D)             8 N

    Correct Answer: A

    Solution :

                    \[{{F}_{l}}=\mu mg=0.6\times 1\times 9.8=5.88\ N\] Pseudo force on the block = \[ma=1\times 5=5\ N\]             Pseudo is less then limiting friction hence static force of friction = 5 N.         


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