AP Physics 1 — Simple Harmonic Motion Equation Finder AP Physics 1 — Simple Harmonic Motion Select the variables you know. Equations will show missing variables or indicate all variables are known. Known Variables k — Spring constant m — Mass x — Displacement v — Velocity F_s — Spring force T — Period f — Frequency ω — Angular frequency K — Kinetic energy U_s — Spring potential energy A — Amplitude φ — Phase constant t — Time Find Equations Possible Equations