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MCQMediumJEE Main 2023 · 29 January, Shift 2Friction (Static, Kinetic, Rolling)

Physics Question from JEE Main 2023 · 29 January, Shift 2

The time taken by an object to slide down a 45∘45^\circ rough inclined plane is nn times as it takes to slide down a perfectly smooth 45∘45^\circ inclined plane. The coefficient of kinetic friction between the object and the inclined plane is:

  • A

    11−n2\sqrt{\frac{1}{1-n^2}}

  • B

    1−1n2\sqrt{1-\frac{1}{n^2}}

  • C

    1+1n21+\frac{1}{n^2}

  • D

    1−1n21-\frac{1}{n^2}

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