Question

5.
Define the term 'Periodic motion! Give two examples of periodic motions that
can be used to measure time.​

Answer 1

the motion that repeat itself after regular intervals of time it is called periodic motion.eg-velling fan,pendulum clock.

Explanation:

hope it may helpful to u

Answer 2

Answer:

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. Answer: ... Two examples are ' Pendulum' and ' Tuning Fork'. Both of these can be used to measure time.