---
title: "Consider an object on a rotating disk at a distance \\( r \\) from its center, held in place on the disk by static friction. Which of the following statements is not true concerning this object?"
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/90813/"
date_modified: "2025-11-03T08:26:47+00:00"
---

# Consider an object on a rotating disk at a distance \( r \) from its center, held in place on the disk by static friction. Which of the following statements is not true concerning this object?

Consider an object on a rotating disk at a distance \( r \) from its center, held in place on the disk by static friction. Which of the following statements is **not** true concerning this object?

- **A.** If the angular speed is constant, the object must have constant tangential speed.
- **B.** If the angular speed is constant, the object is not accelerated.
- **C.** The object has a tangential acceleration only if the disk has an angular acceleration.
- **D.** If the disk is in motion and has an angular acceleration, the object has both a centripetal acceleration and a tangential acceleration.
- **E.** The object always has a centripetal acceleration except when the angular speed is zero.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/90813/*