Question

3.
Define the term 'Periodic motion! Give two examples of periodic motions that
can be used to measure time.
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Answer 1

Answer:

a motion which is repeated in equal inteval of time is called piriodic motion

eg. rocking chair, the earth in its orbit around the sun

Answer 2

Answer:

A repetitive motion which repeat itself after a fixed interval of time is called periodic motion. example of periodic motion are the swinging pendulum of a wall clock