Rotation and Inertia

Start Animation A large wheel (i.e. a flat cylinder) is used to rotate a small wheel of the same density and thickness as shown in the animation (position of a point on the edge of each wheel is shown in meters and time is shown in seconds).

(a) What is the ratio of the moment of inertia of the green wheel to the moment of inertia of the red wheel (Igreen/Ired)?

(b) What is the ratio of the rotational kinetic energy of the green wheel to the rotational kinetic energy of the red wheel (KRgreen/KRred)?

(c) What is the torque on the small wheel?