Rolling: A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii and are of uniform density. If the three are released simultaneously at the top of an inclined plane and roll without slipping, which one will reach the bottom first?
A) solid sphere
B) hollow pipe
C) solid cylinder
D) They all reach the bottom at the same time.

Question

Quizplus · Accepted Answer

The solid sphere reaches the bottom first because it has the smallest moment of inertia, which means it accelerates faster when rolling without slipping.

Rolling: a Solid Sphere, Solid Cylinder, and a Hollow Pipe