Disk and Ring Demonstration,Ring and Disk of equal mass, Disc, wood, 3½" diameter, x ¾" thick, Disc, wood, 5" diameter, ¾" thick, Ring, PVC, gray, 3½" o.d., 13/16" thick, Each

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Here is the corrected text: Demonstrate how rotational inertia depends on an object's mass and its distribution from the axis of rotation by racing combinations of three objects down an incline. The object with greater rotational inertia will always lose the race. Both disks are made of sanded and varnished hardwood to minimize friction. The smaller disk and ring have identical masses and radii, resulting in the same inertia but different rotational inertias. The second disk has exactly twice the mass and a much larger radius. This set is an ideal physics classroom aid for supplementing studies on force and motion, providing real applications of abstract concepts. The set includes one wooden disk (5" diameter, 6oz), one wooden disk (3.5" diameter, 3oz), and one metal ring (3.5" diameter, 3oz). This Disk and Demonstration Race Set recreates a classic physics experiment, allowing students to observe real applications of abstract concepts. Rotational inertia measures an object's resistance to changes in its state of rotational motion, depending on its mass and distribution from the axis of rotation. By racing combinations of disks and rings down an incline, you can observe this concept in action.