AP Physics 1 — Energy Equation Finder AP Physics 1 — Energy Select the variables you know. Equations will show missing variables or indicate all variables are known. Known Variables K — Kinetic energy Ug — Gravitational potential energy Us — Elastic/spring potential energy W — Work P — Power F — Force d — Distance (displacement/work) θ — Angle (work) m — Mass v — Velocity g — Gravitational acceleration k — Spring constant Δx — Spring displacement Find Equations Possible Equations