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7th Class Science Time and Motion Question Bank Motion and Time

  • question_answer
    DIRECTIONS: On the basis of following diagram/picture answer the questions given below: A racing car is fitted with an electronic monitoring system. Data from the car are used to plot a speed-time graph for part of the race. The graph is displayed on a computer screen. The graph covers a period of time when the car is first at rest, then

    A) Moving with uniform speed and then moving with uniform acceleration.

    B) Moving with uniform speed and then moving with non-uniform acceleration.

    C) Moving with uniform acceleration and then moving with non-uniform acceleration.

    D) Moving with non-uniform acceleration and then moving with uniform acceleration.

    Correct Answer: D

    Solution :

        Note that the first part of the question talks about the car being at rest. It then experiences increasing (non-uniform) acceleration, then a uniform acceleration (straight line).


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