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

  • question_answer
    If the force acting on the body is zero, its momentum will be

    A) zero                                          

    B) constant

    C) infinite                                      

    D) variable

    Correct Answer: B

    Solution :

    [b] As, per Newton’s second law, \[F=\frac{dp}{dt}\]
    When, F= 0, then \[\frac{dp}{dt}\]=0
    Thus, the momentum must be constant.


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