RAJASTHAN PMT Rajasthan - PMT Solved Paper-2002

  • question_answer
    A stone is attached to the end of a string and whirled in horizontal circle, then :

    A)  its linear and angular momentum are constant

    B)  only linear momentum is constant

    C)  its angular momentum is constant but linear momentum is variable

    D)  both are variable

    Correct Answer: C

    Solution :

    Angular momentum is constant because there is no external torque on the system, but linear momentum is variable, because velocity change (velocity is a vector quantity, so direction of velocity changes it means velocity changes).             


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