---
title: "A \\(15 \\, \\text{g}\\) marble moves to the right at \\(3.5 \\, \\text{m/s}\\) and makes an elastic head-on collision with a \\(22 \\, \\text{g}\\) marble. The final velocity of the \\(22 \\, \\text{g}\\) marble is \\(2.0 \\, \\text{m/s}\\) to the right, and the final velocity of the \\(15 \\, \\text{g}\\) marble is \\(5.4 \\, \\text{m/s}\\) to the left. What was the initial velocity of the \\(22 \\, \\text{g}\\) marble?"
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url: "https://nerd-notes.com/ubq/29588/"
date_modified: "2025-10-16T05:38:41+00:00"
---

# A \(15 \, \text{g}\) marble moves to the right at \(3.5 \, \text{m/s}\) and makes an elastic head-on collision with a \(22 \, \text{g}\) marble. The final velocity of the \(22 \, \text{g}\) marble is \(2.0 \, \text{m/s}\) to the right, and the final velocity of the \(15 \, \text{g}\) marble is \(5.4 \, \text{m/s}\) to the left. What was the initial velocity of the \(22 \, \text{g}\) marble?

A \(15 \, \text{g}\) marble moves to the right at \(3.5 \, \text{m/s}\) and makes an elastic head-on collision with a \(22 \, \text{g}\) marble. The final velocity of the \(22 \, \text{g}\) marble is \(2.0 \, \text{m/s}\) to the right, and the final velocity of the \(15 \, \text{g}\) marble is \(5.4 \, \text{m/s}\) to the left. What was the initial velocity of the \(22 \, \text{g}\) marble?

- **A.** 5.3 m/s to the right
- **B.** 4.1 m/s to the left
- **C.** 4.1 m/s to the right
- **D.** 5.3 m/s to the left
- **E.** 0.10 m/s to the right

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/29588/*