Give some examples that have both periodic motion and simple harmonic motion.
Some of the familiar periodic motions are a vibrating tuning fork, the Earth revolving around the Sun, a swing in motion, a water wave, and a working pendulum. Simple harmonic motion is a distinct instance of periodic motion. A water wave, the swing and the tuning fork perform simple harmonic motions. On the other hand, the revolution of the Earth and the bouncing ball do not follow the principles of harmonic motion.