Two Uniform Discs,each with the Same Mass but with Radii

question 87

Multiple Choice

Two uniform discs,each with the same mass but with radii differing by a factor of two,roll without slipping down an inclined plane.If the two discs start from rest at the same height h,calculate the ratio of the angular velocity of the small disc divided by that of the larger disc.

• A)1
• B)0.5
• C)4
• D)2
• E)0.25

---

Definitions:

Pegmatite

An igneous rock containing very large crystals, which may be centimeters to meters long.

Igneous Pegmatite

A coarse-grained igneous rock composed primarily of large crystals, often containing rare minerals.

Magma

The molten or semi-molten natural material from which all igneous rocks are derived, located beneath the Earth's surface.

Welded Texture

A texture found in volcanic rocks, formed when hot volcanic ash and debris fuse together under pressure.