JEE Main & Advanced Sample Paper JEE Main - Mock Test - 23

  • question_answer
    The block A of mass \[10\text{ }kg\]is kept on platform P of mass\[25\text{ }kg\]. A force of \[25\text{ }N\]is applied on P and force of \[10\text{ }N\]is applied on A as shown in the figure. Friction is absent between platform and ground. Coefficient of friction between platform and block is \[\mu =0.06.\] Direction of frictional force on block A will be

    A) Towards positive x-axis                              

    B) Towards negative y- axis

    C) At an angle of \[45{}^\circ \]from \[+x\] axis to-y axis  

    D)  None of these

    Correct Answer: C

    Solution :

      [c] If there will be no friction, the relative acceleration of block w.r.t. platform will be at \[45{}^\circ \] from x-axis, so friction will be acting opposite to it.       

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