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A 3D metallic hoop and bead physics diagram with labels 'r' for radius, 'ω' for angular velocity, and 'mg' for gravity.

A 3D metallic hoop and bead physics diagram with labels 'r' for radius, 'ω' for angular velocity, and 'mg' for gravity.

A bead of mass m is constrained to move on a hoop of radius r. The hoop rotates with constant angular velocity omega around a diameter of the hoop, which is a vertical axis line along which gravity acts. Label the quantities See more