---
title: "A pool cue ball, mass \\(0.7 \\, \\text{kg}\\), is traveling at \\(2 \\, \\text{m/s}\\) when it collides head-on with another ball, mass \\(0.5 \\, \\text{kg}\\), traveling in the opposite direction with a speed of \\(1.2 \\, \\text{m/s}\\). After the collision, the cue ball travels in the opposite direction at \\(0.3 \\, \\text{m/s}\\). What is the velocity of the other ball?"
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url: "https://nerd-notes.com/ubq/22793/"
date_modified: "2025-10-16T05:37:10+00:00"
---

# A pool cue ball, mass \(0.7 \, \text{kg}\), is traveling at \(2 \, \text{m/s}\) when it collides head-on with another ball, mass \(0.5 \, \text{kg}\), traveling in the opposite direction with a speed of \(1.2 \, \text{m/s}\). After the collision, the cue ball travels in the opposite direction at \(0.3 \, \text{m/s}\). What is the velocity of the other ball?

A pool cue ball, mass \(0.7 \, \text{kg}\), is traveling at \(2 \, \text{m/s}\) when it collides head-on with another ball, mass \(0.5 \, \text{kg}\), traveling in the opposite direction with a speed of \(1.2 \, \text{m/s}\). After the collision, the cue ball travels in the opposite direction at \(0.3 \, \text{m/s}\). What is the velocity of the other ball?

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/22793/*