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AP Physics C: Mechanics
7.5 Simple and Physical Pendulums
5.4 Rotational Inertia
Multi-Unit
IntermediateMCQMathematicalConceptual16.3k
A front-view schematic of a circular disk suspended in a vertical plane. A circle representing the disk has a solid dark boundary and a light gray fill. A small solid black dot is located on the topmost point of the circular boundary, representing the horizontal pivot point. A second small dot is located at the geometric center of the disk. A vertical dashed line extends downward from the pivot point through the center of the disk to the bottom edge. A double-headed arrow extends from the center of the disk to the right edge, labeled with the variable \(R\). No other labels, lines, text, or axes appear.
Uniform circular disk suspended from a pivot on its rim.
A thin, uniform circular disk of mass \(0.80 \text{ kg}\) and radius \(0.20 \text{ m}\) is suspended in a vertical plane by a frictionless horizontal pivot located at a point on its outer rim. The disk is displaced by a small angle from its vertical equilibrium position and released from rest. What is the period of the resulting small-amplitude oscillations of the disk?

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