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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Motion on Inclined Surface

  • question_answer
    A body of mass 10 kg is lying on a rough plane inclined at an angle of 30o to the horizontal and the coefficient of friction is 0.5.  the minimum force required to pull the body up the plane is                            [JIPMER 2000]

    A)             914 N

    B)             91.4 N

    C)             9.14 N

    D)             0.914 N

    Correct Answer: B

    Solution :

                    \[F=mg(\sin \theta +\mu \cos \theta )\]                \[=10\times 9.8(\sin 30{}^\circ +0.5\cos 30{}^\circ )=91.4\ N\].


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