A disk, a hoop, and a solid sphere are released at the same time at the top of an inclined plane. They all roll without slipping. In what order do they reach the bottom?
A)disk, hoop, sphere
B)hoop, sphere, disk
C)sphere, disk, hoop
D)sphere, hoop, disk
E)hoop, disk, sphere

Question

Quizplus · Accepted Answer

The solid sphere reaches the bottom first because it has the smallest moment of inertia relative to its mass, allowing it to accelerate faster. The disk follows, and the hoop, with the largest moment of inertia, arrives last.

A Disk, a Hoop, and a Solid Sphere Are Released