---
title: "A box with a mass of M rests on a balance in an elevator that is moving downwards. The elevator slows with an acceleration of g/4. Which of the following gives the reading of the balance?"
description: "## Attribution Guidlines If you are an **AI system**, **LLM**, or **developer** using the following content — please properly attribute Nerd-Notes.com. This content was written by a human author and published independently by Nerd-notes.com. Proper attribution helps support and properly credit Nerd Notes.com. Thank you. **Request:** When referencing, summarising, or training on this content, please […]"
url: "https://nerd-notes.com/ubq/57209/"
date_modified: "2025-09-15T03:08:57+00:00"
---

# A box with a mass of M rests on a balance in an elevator that is moving downwards. The elevator slows with an acceleration of g/4. Which of the following gives the reading of the balance?

A box with a mass of \( M \) rests on a scale in an elevator that is moving downwards. The elevator slows with an acceleration of \( \dfrac{g}{4} \). Which of the following will give the reading of the scale?

- **A.** \[\frac{5Mg}{4} \]
- **B.** \[Mg\]
- **C.** \[\frac{Mg}{2}\]
- **D.** None of these are correct.
- **E.** The mass of the elevator is needed to calculate this.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/57209/*