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    Physics
    Grade-9
    Easy

    Question

    Select the one that is an example of periodic motion:

    1. A car taking a turn on a curved road.
    2. March past of soldiers.
    3. A bird flying in the air.
    4. A lift moving down.

    Hint:

    periodic motion, in physics, motion repeated in equal intervals of time.

    The correct answer is: March past of soldiers.

      periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave
      Bird's motion is periodic while wing flapping is oscillatory.

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