Oscillations

Periodic motion – time period, frequency, displacement as a function of time, periodic functions.
Simple harmonic motion (S.H.M) and its equation; phase; oscillations of a loaded springrestoring force and force constant; energy in S.H.M. Kinetic and potential energies; simple
pendulum derivation of expression for its time period.
Free, forced and damped oscillations (qualitative ideas only), resonance.