---
title: "A \\( 25.0 \\) \\( \\text{kg} \\) block is initially at rest on a horizontal surface. A horizontal force of \\( 75.0 \\) \\( \\text{N} \\) is required to set the block in motion, after which a horizontal force of \\( 60.0 \\) \\( \\text{N} \\) is required to keep the block moving with constant speed."
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url: "https://nerd-notes.com/ubq/90796/"
date_modified: "2025-12-05T22:14:52+00:00"
---

# A \( 25.0 \) \( \text{kg} \) block is initially at rest on a horizontal surface. A horizontal force of \( 75.0 \) \( \text{N} \) is required to set the block in motion, after which a horizontal force of \( 60.0 \) \( \text{N} \) is required to keep the block moving with constant speed.

A \( 25.0 \) \( \text{kg} \) block is initially at rest on a horizontal surface. A horizontal force of \( 75.0 \) \( \text{N} \) is required to set the block in motion, after which a horizontal force of \( 60.0 \) \( \text{N} \) is required to keep the block moving with constant speed.

**Part a)** Find the coefficient of static friction. *(3 points)*

**Part b)** Find the coefficient of kinetic friction between the block and the surface. *(3 points)*


*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/90796/*