A thin ring of mass and radius rotates about its symmetry axis at
PHYSICS · Subjective · AP · Physics 1: Algebra-based · Energy and Momentum of Rotating Systems · Energy and Momentum of Rotating Systems
Problem
A thin ring of mass 2.0kg and radius 0.20m rotates about its symmetry axis at 6.0rad/s. It is gently dropped onto a coaxial solid disk of mass 1.5kg and the same radius that is initially at rest; they quickly couple and rotate together without slipping. Determine their common angular velocity just after they begin rotating as one unit.