A small uniform disk and a small uniform sphere are released simultaneously at the top of a high inclined plane, and they roll down without slipping. Which one will reach the bottom first?
A) the one of greatest mass
B) the sphere
C) the one of smallest diameter
D) the disk
E) They will reach the bottom at the same time.

Question

Quizplus · Accepted Answer

The sphere will reach the bottom first because it has a lower moment of inertia compared to the disk, allowing it to accelerate faster down the incline under the same conditions.

A Small Uniform Disk and a Small Uniform Sphere Are