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  3. 7th Class
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  5. Time and Motion

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: One oscillation of a swinging pendulum occurs when the bob moves from X to Y and back to X again. Using a stopwatch, which would be the most accurate way to measure the time for one oscillation of the pendulum?

    A) Time 20 oscillations and multiply by 20.

    B) Time 20 oscillations and divide by 20.

    C) Time one oscillation.

    D) Time the motion from X to Y, and double it.

    Correct Answer: B

    Solution :

        It is not a accurate to time just one oscillation, as the human reaction time of 0.3 s causes a large error in the reading the best way is to time 20 oscillation and divide the time by 20.


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