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title: "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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url: "https://nerd-notes.com/ubq/120871/"
date_modified: "2026-08-23T04:43:54+00:00"
---

# 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?

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?

![A large circle represents a uniform disk in a vertical plane. A small black filled dot labeled P marks a pivot located to the left of the geometric center. A small crosshair labeled C marks the center of mass, positioned along the same horizontal dashed line as P and to the right of P. A small black dot labeled A is located on the top perimeter of the circle, vertically aligned directly above point P. A horizontal solid vector arrow labeled \vec{F}_0 starts at point A and points to the left. A horizontal dashed line segment connects point P and point C, labeled d. A vertical dashed line connects point P and point A, labeled R. No other labels, lines, text, or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-setup-diagram-1787460233-zEFoP5.jpg)

- **A.** Diagram A
- **B.** Diagram B
- **C.** Diagram C
- **D.** Diagram D

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120871/*