Railways General Science & Technology Mechanics Sample Paper Mechanics-II Sample Test Paper-2

  • question_answer
    If a running boy jumps on a rotating table, which of the following is conserved.

    A)  Linear momentum

    B)  K.E

    C)  Angular momentum

    D)  neither of above

    Correct Answer: C

    Solution :

    [c] The boy does not exert a torque to rotating table by jumping, so angular momentum is conserved i.e., \[=\frac{d\overrightarrow{L}}{dt}=0\Rightarrow \overrightarrow{L}=\] constant

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