🏎️ Banked Curve and Conical Pendulum: Friction Circle, Skid Limits and Centripetal Force Lab

A car on a banked circular road and a conical pendulum show the same centripetal force two ways: find the skid and slide-down speeds from the friction circle, compare the simulated limits with the closed-form formulas, and see why a pendulum period does not depend on mass.