---
title: "A student is watching their hockey puck slide up and down an incline. They give the puck a quick push along a frictionless table, and it slides up a \\( 30^\\circ \\) rough incline (\\( \\mu_k = 0.4 \\)) of distance \\( d \\), with an initial speed of \\( 5 \\) \\( \\text{m/s} \\), and then it slides back down."
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url: "https://nerd-notes.com/ubq/20255/"
date_modified: "2025-04-18T01:52:25+00:00"
---

# A student is watching their hockey puck slide up and down an incline. They give the puck a quick push along a frictionless table, and it slides up a \( 30^\circ \) rough incline (\( \mu_k = 0.4 \)) of distance \( d \), with an initial speed of \( 5 \) \( \text{m/s} \), and then it slides back down.

A student is watching their hockey puck slide up and down an incline. They give the puck a quick push along a frictionless table, and it slides up a \( 30^\circ \) rough incline (\( \mu_k = 0.4 \)) of distance \( d \), with an initial speed of \( 5 \) \( \text{m/s} \), and then it slides back down.

**Part a)** Does it take longer to move up the distance \( d \) or back down the distance \( d \)? Or does it take the same amount of time? Explain briefly. *(5 points)*

**Part b)** **Bonus Challenge:** Repeat the problem but assume you are not given the initial speed, angle of incline, or \( \mu_k \). *(7 points)*


*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/20255/*