---
title: "A \\( 52 \\) \\( \\text{N} \\) sled is pushed across a cement sidewalk at constant velocity. A horizontal pushing force of \\( 36 \\) \\( \\text{N} \\) is exerted."
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url: "https://nerd-notes.com/ubq/114229/"
date_modified: "2026-08-18T02:37:47+00:00"
---

# A \( 52 \) \( \text{N} \) sled is pushed across a cement sidewalk at constant velocity. A horizontal pushing force of \( 36 \) \( \text{N} \) is exerted.

A \( 52 \) \( \text{N} \) sled is pushed across a cement sidewalk at constant velocity. A horizontal pushing force of \( 36 \) \( \text{N} \) is exerted.

**Part a)** What is the coefficient of sliding friction between the sidewalk and the metal runners of the sled? *(3 points)*

**Part b)** Suppose the sled now runs on packed snow. The coefficient of friction is now only \( 0.12 \). If a person weighing \( 650 \) \( \text{N} \) now sits on the sled, what applied force is now needed to slide the sled across the snow at constant velocity? *(3 points)*


*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/114229/*