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NEET Sample Paper NEET Sample Test Paper-26

  • question_answer
    A block with a speed of \[{{V}_{0}}=6m/s\] along a track from one level to higher level as shown. The track is frictionless untill the block reaches the higher level, where coefficient of friction is\[0.6\]. The distance d travelled by block on higher level before stopping is \[(g=10m/{{s}^{2}})\]:

    A)  \[7/6m\]              

    B)  \[5/6m\]

    C)  \[29/6m\]                    

    D)  \[3m\]

    Correct Answer: A

    Solution :

    By work-energy theorem, \[Wmg+{{W}_{function}}\] \[={{K}_{f}}-{{K}_{f}}-mgh-\mu \,mgd=0-\frac{1}{2}m\upsilon _{0}^{9}\] \[\Rightarrow \]\[-10\times 1.1-0.6\times 10\times d=\frac{1}{2}\times {{6}^{2}}-(11+6d)\] \[\Rightarrow \]               \[11+6d=18,\]  \[d=\frac{7}{6}m.\]


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