Mode

Planar swing (rosette) Conical pendulum Foucault (Coriolis)

Latitude 49° Initial angle θ₀ 30° Azimuthal velocity 0.00 Gravity g 9.81 Foucault time scale 5000× Show trail Show sphere Show ground projection

Stats

ModePlanar

Latitude49°

θ (current)—

Energy E—

L_z—

T (conical, theor.)—

Ω·sin(lat)—

Observed precession—

Drag the canvas to rotate the camera; scroll to zoom. The pendulum is constrained to a unit sphere (L=1). RK4 integrates Cartesian (x,y,z,v) and the bob is reprojected to the sphere each step. In Foucault mode the frame rotates at Earth's Ω about the local vertical and a Coriolis force 2·Ω×v acts on the bob — the swing plane drifts at Ω·sin(lat).