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

  • question_answer
    Read the following and answer any four questions from [1] to [6].
    Newton farther studied Galileo's ideas on force and motion and presented three fundamental laws that govern the motion of objects. These three laws are known as Newton's laws of motion. The first law of motion is stated as:
    An object remains in a state of rest or of uniform motion in a straight line unless compelled to change that state by an applied force.
    In other words, all objects resist a change in their state of motion. In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called inertia. This is why, the first law of motion is also known as the law of inertia.
    A football and a stone has same mass, then both will have

    A) same inertia

    B) same momentum

    C) different inertia                          

    D) different momentum

    Correct Answer: A

    Solution :

    [a] As, inertia is a measure of mass of body, so, both will have same inertia.


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