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NEET Sample Paper NEET Sample Test Paper-80

  • question_answer
    A body of mass 100 g is sliding from an inclined plane of inclination\[30{}^\circ \]. What is the frictional force, if \[\mu =0.7\]?

    A)  \[0.7\,\,\sqrt{\frac{2}{3}}\,N\]               

    B)  \[\frac{0.7\,\,\sqrt{3}\,}{2}N\]

    C)  \[0.7 \sqrt{3}\,\,N\]                   

    D)  \[\frac{0.7 \sqrt{2}}{3}\,\,N\]

    Correct Answer: B

    Solution :

    Friction force, \[\operatorname{F} = \mu \,mg\,\,cos \theta \] \[=\,\,0.7\times 100\times {{10}^{-\,3}}\times 10\,cos\,\,30{}^\circ \] \[=\,\,0.7\times \frac{\sqrt{3}}{2}\] \[=\,\,\frac{0.7\,\sqrt{3}}{2}\,N\]


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