---
title: "A ball is thrown straight up with a speed of \\( 30 \\) \\( \\text{m/s} \\), and air resistance is negligible."
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url: "https://nerd-notes.com/ubq/91335/"
date_modified: "2025-07-26T02:56:54+00:00"
---

# A ball is thrown straight up with a speed of \( 30 \) \( \text{m/s} \), and air resistance is negligible.

A ball is thrown straight up with a speed of \( 30 \) \( \text{m/s} \), and air resistance is negligible.

**Part a)** How long does it take the ball to reach the maximum height? *(3 points)*

**Part b)** What is the maximum height reached by the ball? *(3 points)*

**Part c)** What is its speed after \( 4.2 \) \( \text{s} \)? *(3 points)*


*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/91335/*