Introduction To Periodic Motion
Concepts to remember on Introduction to Periodic Motion for JEE and CBSE board exams:

Periodic motion:

Repeats itself at regular intervals.

Time period is the time taken for one complete oscillation.

Frequency is the number of oscillations per second.

Simple harmonic motion (SHM):

Restoring force is directly proportional to the displacement from the mean position.

Total energy is constant.

Hooke’s law: Restoring force in SHM is directly proportional to displacement.

Amplitude: Maximum displacement from the mean position.

Phase: Angular displacement from the reference position at an instant.

Applications of SHM: Used in springs, pendulums, waves, and sound.