Periodic motion: A type of motion that repeats itself after equal intervals of time is called periodic motion. Example of objects undergoing periodic motion are the to and fro motion of a pendulum, the earth (rotating on its axis), the hands of a clock.
Non- periodic motion: A motion that does not repeat itself at regular intervals or a motion that does not repeat itself at all is called non- periodic motion. Example of non- periodic motion are a car moving on a road, a bird gliding across the sky, and children playing in a park. In everyday life, we observe more than one type of motion, like
· Birds gliding across the sky (translational and non- periodic)
· Rotation of the earth on its axis (rotational and periodic)
Which of the following are correct : (a) A motion that does not repeat itself at regular intervals or a motion that does not repeat itself at all is called periodic motion. (b) A motion that does not repeat itself at regular intervals or a motion that does not repeat itself at all is called non- periodic motion. (c) Example of non- periodic motion are a car moving on a road, a bird gliding across the sky. | |||
Right Option : B | |||
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Time taken by a simple pendulaum of a particular length to complete one oscilation is _____________ | |||
Right Option : C | |||
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Which of the following are correct : (a) A type of motion that repeats itself after equal intervals of time is called periodic motion. (b) A type of motion that repeats itself after equal intervals of time is called non-periodic motion. (c) Examples of periodic motion are the rotation of the earth about its axis, the revolution of the earth around the sun. | |||
Right Option : C | |||
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