25.6.5 Simple Harmonic Motion: Sine Waves in the Real World
Core ideaA spring bobbing, a pendulum swinging, sound vibrating — the displacement over time is exactly a wave of the form Asin(ωt+φ).
Module goal. We treat a sine wave's amplitude, period, and phase as adjustable dials, understand how each parameter reshapes the graph, and use it to describe real back-and-forth motions like springs and sound.