---
title: "A block of mass \\(2.0 \\text{ kg}\\) is pulled across a rough horizontal surface by an external horizontal force of magnitude \\(F_{app}\\). The coefficient of kinetic friction between the block and the surface is \\(\\mu_k = 0.2\\). The velocity of the block as a function of time is shown in the graph below.  Which of the following tables correctly identifies the magnitude of the applied force \\(F_{app}\\) during the time intervals \\(0\\text{–}2 \\text{ s}\\) and \\(2\\text{–}4 \\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/114478/"
date_modified: "2026-07-03T04:36:54+00:00"
---

# A block of mass \(2.0 \text{ kg}\) is pulled across a rough horizontal surface by an external horizontal force of magnitude \(F_{app}\). The coefficient of kinetic friction between the block and the surface is \(\mu_k = 0.2\). The velocity of the block as a function of time is shown in the graph below.

Which of the following tables correctly identifies the magnitude of the applied force \(F_{app}\) during the time intervals \(0\text{–}2 \text{ s}\) and \(2\text{–}4 \text{ s}\)?

A block of mass \(2.0 \text{ kg}\) is pulled across a rough horizontal surface by an external horizontal force of magnitude \(F_{app}\). The coefficient of kinetic friction between the block and the surface is \(\mu_k = 0.2\). The velocity of the block as a function of time is shown in the graph below.

Which of the following tables correctly identifies the magnitude of the applied force \(F_{app}\) during the time intervals \(0\text{--}2 \text{ s}\) and \(2\text{--}4 \text{ s}\)?

![A velocity-time graph with velocity v in meters per second on the y-axis and time t in seconds on the x-axis. The y-axis ranges from 0 to 6 with labels at 0, 2, 4, and 6. The x-axis ranges from 0 to 6 with labels at 0, 2, 4, and 6. The graph consists of three line segments: a linear increase from (0,0) to (2,4), a horizontal line from (2,4) to (4,4), and a linear decrease from (4,4) to (6,0).](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-graph-1-1783053413-PncioX.jpg)

- **A.** | Time Interval | Magnitude of \(F_{app}\) | |---|---| | \(0\text{--}2 \text{ s}\) | \(4 \text{ N}\) | | \(2\text{--}4 \text{ s}\) | \(0 \text{ N}\) |
- **B.** | Time Interval | Magnitude of \(F_{app}\) | |---|---| | \(0\text{--}2 \text{ s}\) | \(8 \text{ N}\) | | \(2\text{--}4 \text{ s}\) | \(4 \text{ N}\) |
- **C.** | Time Interval | Magnitude of \(F_{app}\) | |---|---| | \(0\text{--}2 \text{ s}\) | \(4 \text{ N}\) | | \(2\text{--}4 \text{ s}\) | \(4 \text{ N}\) |
- **D.** | Time Interval | Magnitude of \(F_{app}\) | |---|---| | \(0\text{--}2 \text{ s}\) | \(8 \text{ N}\) | | \(2\text{--}4 \text{ s}\) | \(0 \text{ N}\) |

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/114478/*