---
title: "A train is moving to the right at \\( 20 \\) \\( \\text{m/s} \\). A passenger on the train throws a ball horizontally to the left at \\( 5 \\) \\( \\text{m/s} \\) (relative to the train)."
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url: "https://nerd-notes.com/ubq/98433/"
date_modified: "2025-11-03T09:47:22+00:00"
---

# A train is moving to the right at \( 20 \) \( \text{m/s} \). A passenger on the train throws a ball horizontally to the left at \( 5 \) \( \text{m/s} \) (relative to the train).

A train is moving to the right at \( 20 \) \( \text{m/s} \). A passenger on the train throws a ball horizontally to the left at \( 5 \) \( \text{m/s} \) (relative to the train).

**Part a)** What is the velocity of the ball relative to the ground? *(3 points)*

**Part b)** How far does the ball travel relative to the ground in \(4.0 \, \text{s}\)? *(3 points)*

**Part c)** The ball is thrown from a height of \(1.5 \, \text{m}\) above the train floor. What is the velocity of the ball relative to the train when it hits the floor? *(3 points)*


*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/98433/*