---
title: "A \\(4 \\, \\text{kg}\\) mass is traveling at \\(10 \\, \\text{m/s}\\) to the right when it collides elastically with a stationary \\(7 \\, \\text{kg}\\) mass. The \\(7 \\, \\text{kg}\\) mass then travels at \\(2 \\, \\text{m/s}\\) at an angle of \\(22^\\circ\\) below the horizontal. What is the velocity of the \\(4 \\, \\text{kg}\\) mass?"
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url: "https://nerd-notes.com/ubq/22802/"
date_modified: "2025-12-22T09:17:49+00:00"
---

# A \(4 \, \text{kg}\) mass is traveling at \(10 \, \text{m/s}\) to the right when it collides elastically with a stationary \(7 \, \text{kg}\) mass. The \(7 \, \text{kg}\) mass then travels at \(2 \, \text{m/s}\) at an angle of \(22^\circ\) below the horizontal. What is the velocity of the \(4 \, \text{kg}\) mass?

A \(4 \, \text{kg}\) mass is traveling at \(10 \, \text{m/s}\) to the right when it collides elastically with a stationary \(7 \, \text{kg}\) mass. The \(7 \, \text{kg}\) mass then travels at \(2 \, \text{m/s}\) at an angle of \(22^\circ\) below the horizontal. What is the velocity of the \(4 \, \text{kg}\) mass?

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/22802/*