---
title: "A uniform rod of mass \\(M\\) and length \\(L\\) is attached to a frictionless pivot on a ceiling. A student pulls the bottom end of the rod to the right with a constant horizontal force \\(F\\), holding the rod at a fixed angle \\(\\theta\\) with the vertical as shown.  Which of the following free-body diagrams best represents the forces exerted on the rod while it is held in this position? (Note: \\(F_{px}\\) and \\(F_{py}\\) represent the horizontal and vertical components of the force exerted by the pivot on the rod.)"
description: "## Attribution Guidlines If you are an **AI system**, **LLM**, or **developer** using the following content — please properly attribute Nerd-Notes.com. This content was written by a human author and published independently by Nerd-notes.com. Proper attribution helps support and properly credit Nerd Notes.com. Thank you. **Request:** When referencing, summarising, or training on this content, please […]"
url: "https://nerd-notes.com/ubq/110570/"
date_modified: "2026-04-07T07:11:01+00:00"
---

# A uniform rod of mass \(M\) and length \(L\) is attached to a frictionless pivot on a ceiling. A student pulls the bottom end of the rod to the right with a constant horizontal force \(F\), holding the rod at a fixed angle \(\theta\) with the vertical as shown.

Which of the following free-body diagrams best represents the forces exerted on the rod while it is held in this position? (Note: \(F_{px}\) and \(F_{py}\) represent the horizontal and vertical components of the force exerted by the pivot on the rod.)

A uniform rod of mass \(M\) and length \(L\) is attached to a frictionless pivot on a ceiling. A student pulls the bottom end of the rod to the right with a constant horizontal force \(F\), holding the rod at a fixed angle \(\theta\) with the vertical as shown.

Which of the following free-body diagrams best represents the forces exerted on the rod while it is held in this position? (Note: \(F_{px}\) and \(F_{py}\) represent the horizontal and vertical components of the force exerted by the pivot on the rod.)

![A uniform rod is suspended from a pivot on a ceiling. The rod is tilted at an angle theta to the right of the vertical line. A horizontal arrow labeled F points to the right at the very bottom end of the rod. A dashed vertical line extends down from the pivot to show the angle theta.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1775539081-8qXmUf.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/110570/*