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NEET Sample Paper NEET Sample Test Paper-22

  • question_answer
    A block rests on a rough inclined plane making an angle of \[30{}^\circ \] with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is ION, the mass of the block is (take\[g=10\text{ }m/{{s}^{2}}\])

    A)  2.0 kg             

    B)       4.0 kg 

    C)       1.6kg             

    D)       2.5kg  

    Correct Answer: A

    Solution :

    As the block is at rest, so the frictional force must be equal to the component of the weight along the inclined plane. \[\therefore \]\[mg\,\sin \theta =10\Rightarrow m\times 10\times \frac{1}{2}=10\Rightarrow m=2\,kg\] Hence, the correction option is [a].


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