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AP Physics C: Mechanics
5.5 Rotational Equilibrium and Newton’s First Law in Rotational Form
5.3 Torque
IntermediateMCQDrawing RepresentationsConceptual25k
Disk pivoted at off-center point P in static equilibrium.
Disk pivoted at off-center point P in static equilibrium.
A uniform circular disk of mass \(M\) and radius \(R\) is mounted on a fixed, frictionless horizontal axle passing through pivot point \(P\), located a distance \(d = \dfrac{R}{2}\) to the left of the disk's center of mass \(C\). The disk is held in static equilibrium in a vertical plane with point \(C\) at the same horizontal level as point \(P\). A horizontal force of magnitude \(F_0\) is applied to the left at point \(A\) on the top rim of the disk, located directly above pivot point \(P\). Which of the following diagrams represents all the forces acting on the disk at their correct points of application and in the correct directions?

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