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

  • question_answer
    There are two statements
    A. Newton's first law is valid for the pilot in an aircraft which is taking off.
    B. Newton's first law is valid for the observer in a train moving with constant velocity.
    Which of the following is correct?

    A) A only                                      

    B) B only

    C) Both A and B                            

    D) None of the above

    Correct Answer: B

    Solution :

    [b] As we know, Newton's first law is involved in non-inertial frame of reference. Now since acceleration is present in 1st case. So, only statement B is correct.


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