PHYSICS · Single correct · AP · Physics 1: Algebra-based · Energy and Momentum of Rotating Systems · Energy and Momentum of Rotating Systems
Problem
Two uniform wheels, A and B, each have the same rotational kinetic energy. Wheel A rotates with an angular speed that is twice that of wheel B. Which of the following correctly compares their rotational inertias IA and IB?
(a) IA=IB
(b) IA=21IB
(c) IA=41IB
(d) IA=4IB