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Ring and Discs—Demonstration Kit

By: The Flinn Staff

Item #: AP4634

Price: $18.10

In the Ring and Discs Demonstration Kit for physical science and physics, race a ring and a disc of equal mass and diameter down an inclined plane. Results are explained using concepts of inertia and potential and kinetic energy.

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Product Details

It’s a race! A ring and disc of equal mass and diameter speed down an inclined plane. Which one wins? Not an easy prediction to make, but the victor will be clear. Results are explained using concepts of inertia, rotational inertia and potential and kinetic energy. Once students understand the results of the first race, they predict the outcome of a race between the ring and two discs—the second disc being larger than the first. Will the disc diameter make a difference? Includes instructions and detailed mathematical explanation of results.

Concepts: Rotational motion, potential energy, moment of inertia, kinetic energy, Newton’s Law of Motion.
Time Required: 15 minutes
Materials Provided: 3.5" diameter wood disc, 5" diameter wood disc, 3.5" diameter plastic ring.
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