A solid cylinder and a hollow cylinder have the same mass and the same radius. Which statement is true concerning their moment of inertia about an axis through the exact center of the flat surfaces?
A) The solid cylinder has the greater moment of inertia.
B) The hollow cylinder has the greater moment of inertia.
C) The moment of inertia cannot be determined since it depends on the amount of material removed from the inside of the hollow cylinder.
D) Both cylinders have the same moment of inertia.

Question

Quizplus · Accepted Answer

The moment of inertia depends on how mass is distributed relative to the axis of rotation. For objects with the same mass and radius, the one with mass further from the axis (the hollow cylinder) will have a greater moment of inertia.

A Solid Cylinder and a Hollow Cylinder Have the Same