Simple harmonic motion

What is simple harmonic motion?

Simple harmonic motion describes oscillation where the restoring force is proportional to displacement and directed toward equilibrium: a = −ω²x. The system oscillates with constant period T = 2π/ω regardless of amplitude. SHM examples: mass on a spring (ω = √(k/m)), simple pendulum (ω = √(g/L) for small angles), molecular vibrations. A-Level Physics examines displacement, velocity and acceleration equations, energy in SHM and damping.