Kinetic Balance Pen: a sleek ball point pen finds balance in this desktop sculpture from Kikkerland. When the pen is placed in its cap the center of mass of the system is below the pivot contact point, creating a situation of stable equilibrium. ➡️ Follow the link in my profile to find this balance pen and other amazing items featured here on @physicsfun #equilibrium #centerofmass #stableequilibium #physics #pen #physicstoy #balance #balancetoy #science #scienceisawesome | Physicsfun

Bo'az Klartag - Convexity in High Dimensions V