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

  • question_answer
    A lift accelerated downward with acceleration 'a'. A man in the lift throws a ball upward with acceleration \[{{a}_{0}}({{a}_{0}}<a).\] Then acceleration of ball observed by observer, which is on earth, is                                    [AIEEE 2002]

    A)             \[(a+{{a}_{0}})\] upward

    B)               \[(a-{{a}_{0}})\] upward

    C)             \[(a+{{a}_{0}})\] downward           

    D)             \[(a-{{a}_{0}})\] downward

    Correct Answer: D

    Solution :

                    The effective acceleration of ball observed by observer on earth = (a ? a0) As \[{{a}_{0}}<a,\] hence net acceleration is in downward direction.


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