---
title: "A block of mass \\(M\\) is held at rest on a rough surface inclined at an angle of \\(30^\\circ\\) relative to the horizontal. The only forces acting on the block are gravity, the normal force, and the force of static friction. Which of the following diagrams best represents the directions and relative magnitudes of these forces?"
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url: "https://nerd-notes.com/ubq/109581/"
date_modified: "2026-04-09T11:33:22+00:00"
---

# A block of mass \(M\) is held at rest on a rough surface inclined at an angle of \(30^\circ\) relative to the horizontal. The only forces acting on the block are gravity, the normal force, and the force of static friction. Which of the following diagrams best represents the directions and relative magnitudes of these forces?

A block of mass \(M\) is held at rest on a rough surface inclined at an angle of \(30^\circ\) relative to the horizontal. The only forces acting on the block are gravity, the normal force, and the force of static friction. Which of the following diagrams best represents the directions and relative magnitudes of these forces?

![A square block of mass M rests on a ramp. The ramp makes a 30-degree angle with the horizontal ground. The block is on the middle of the ramp.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-setup-1774422304-60mcDt.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/109581/*