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

  • question_answer
    Velocity-time graph of a moving particle of mass 1 kg is shown below. The force acting on the particle is

    A) 0                                             

    B) 4 N

    C) 8 N                                          

    D) 10 N

    Correct Answer: A

    Solution :

    [a] The slope of velocity-time graph shows acceleration of body.
    Here, velocity is constant.
    So, \[a=\frac{dv}{dt}=0\]
    \[\therefore \] Force F=\[m\times a=1\times 0=0\]


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