2. Questions Bank
  3. 9th Class
  4. Science
  5. Time and Motion

9th Class Science Time and Motion Question Bank Case Based MCQs - Motion

  • question_answer
    Acceleration is a vector quantity. I indicates that its value can be  

    A) positive, negative or zero

    B) always positive

    C) always negative

    D) zero

    Correct Answer: A

    Solution :

    [a] Acceleration is rate of change of velocity.
    So, its value depends on whether the velocity is increasing or decreasing.
    Hence, it can be positive, negative or zero.


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