---
title: "A disk of radius \\( R = 0.5 \\) \\( \\text{cm} \\) rests on a flat, horizontal surface such that frictional forces are considered to be negligible. Three forces of unknown magnitude are exerted on the edge of the disk, as shown in the figure. Which of the following lists the essential measuring devices that, when used together, are needed to determine the change in angular momentum of the disk after a known time of \\( 5.0 \\) \\( \\text{s} \\)?"
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/28491/"
date_modified: "2025-03-11T05:11:42+00:00"
---

# A disk of radius \( R = 0.5 \) \( \text{cm} \) rests on a flat, horizontal surface such that frictional forces are considered to be negligible. Three forces of unknown magnitude are exerted on the edge of the disk, as shown in the figure. Which of the following lists the essential measuring devices that, when used together, are needed to determine the change in angular momentum of the disk after a known time of \( 5.0 \) \( \text{s} \)?

A disk of radius \( R = 0.5 \) \( \text{cm} \) rests on a flat, horizontal surface such that frictional forces are considered to be negligible. Three forces of unknown magnitude are exerted on the edge of the disk, as shown in the figure. Which of the following lists the essential measuring devices that, when used together, are needed to determine the change in angular momentum of the disk after a known time of \( 5.0 \) \( \text{s} \)?

![Diagram](https://nerd-notes.com/wp-content/uploads/2024/03/disk-momentum-forces-e1711346045321-300x261.png)

- **A.** Force probe and protractor
- **B.** Force probe, protractor, and motion sensor
- **C.** Electronic balance and force probe
- **D.** Electronic balance, force probe, and motion sensor

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/28491/*