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Ring and Disk Apparatus
Item #P3-3540
$48.95
Bundle Discount
| Unit Price | $48.95 |
| 6+ | $46.00 |
Demonstrate rotational inertia with a surprising race down a ramp
The Ring and Disk apparatus delivers a classic, thought-provoking demonstration of rotational motion and inertia. Two objects of nearly equal mass and radius—one a solid disk and the other a ring—are released on an incline. Which reaches the bottom first? By requiring students to reason through rotational inertia rather than just mass or size, the Ring and Disk provides a clear, engaging way to deepen understanding of rolling motion. (Ramp not included.)
Why Teachers Love the Ring and Disk
- Memorable discrepant event: Students are surprised by the outcome, sparking discussion and inquiry.
- Clear concept focus: Demonstrates rotational inertia and the role of mass distribution in motion.
- Demonstration-sized: Large enough for easy viewing during front-of-class demonstrations.
- Simple and durable: No complex setup—just a ramp and thoughtful questioning.
Resources
Resources
Product Details
Demonstration size Ring and Disk - a classic for your classroom!
In this classic discrepant event, two objects of nearly equal mass and equal radius roll down an incline. One is a solid disk and the other is a ring. Which reaches the bottom first?
Students must consider the distribution of mass, how it affects rotational inertia, and how inertia affects motion.
Ramp not included.
Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.
Product Specifications
Specs:
Diameter - 15 cm
Width - 5 cm
Weight - 1.45 Lbs
What's Included:
Metal Ring
Wooden Disk
Warning: California Residents
WARNING: Cancer & Reproductive Harm — www.P65Warnings.ca.gov
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