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9th Class Science Force and laws of motion Question Bank MCQs - Force and Laws of Motion

  • question_answer
    The linear momentum of a system remains constant if no ............ force acts on it.

    A) internal                                     

    B) external

    C) Both [a] and [b]                         

    D) None of these

    Correct Answer: B

    Solution :

    [b] According to the law of conservation of momentum, "the total momentum of a system remains constant, till an external force applied on it."


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