Rolling Pendulum

Popis Concave transparent acrylic body with spherical curvature. A rolling ball oscillates inside the concavity about its rest position like a mathematical pendulum does. The radius of curvature is equivalent to the length of a normal pendulum. Includes three steel balls. Diameter of balls: 16 mm Radius of curvature: 200 mm Diameter: 140 mm Průměr kuliček: 16 mm Poloměr zakřivení: 200 mm Průměr: 140 mm