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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Second Law of Motion

  • question_answer
    The ratio of the weight of a man in a stationary lift and when it is moving downward with uniform acceleration ?a? is 3 : 2. The value of ?a? is (g-Acceleration due to gravity of the earth)                         [MP PET 1997]

    A)                         \[\frac{3}{2}g\]                      

    B)                       \[\frac{g}{3}\]          

    C)                         \[\frac{2}{3}g\]                    

    D)                         g

    Correct Answer: B

    Solution :

                              \[\frac{mg}{m(g-a)}=\frac{3}{2}\] Þ \[a=g/3\]          


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