Question

What's periodic and oscillatory motion

Answer 1

Periodic motion:-

• The motion which repeats itself after regular interval of time in a fixed path is called periodic motion

• The constant interval of time after which motion is repeated is called time period.

Example :-

• Motion of planets around Sun.
• Motion of pendulum.

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Oscillatory motion:-

• When a body moves to and fro about a fixed point, then it's motion is called oscillatory motion.

• The fixed point about which the body moves is called mean position.

Example:-

• Motion of Pendulum
• Motion of wire of guitar.

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Knowledge cell:-

• Is periodic and oscillatory motion same/ synonymous?

Ans:- Every Periodic motion isn't oscillatory motion. But when mechanical energy is conserved every oscillatory motion can be said to be a periodic motion.

• Simple Harmonic Motion, is it oscillatory?

Ans:- Simple Harmonic Motion is simplist form is oscillatory motion with fixed extreme points. In SHM, total mechanical energy of particle remains constant.