---
title: Horizontal Beam
topic: Rotational Dynamics
author: Firas Moosvi
source: OPUS V1 Problem 10.6.81
template_version: 1.4
attribution: openstax-physics-vol1
partialCredit: true
singleVariant: true
showCorrectAnswer: false
outcomes:
- 11.3.1.2
difficulty:
- medium
randomization:
- 4
taxonomy:
- undefined
span:
- undefined
length:
- short
tags:
- JR
assets:
- horizontal_beam.png
part1:
  type: number-input
  pl-customizations:
    rtol: 0.05
    weight: 1
    allow-blank: true
    label: $\tau = $
    suffix: $\rm{N \cdot m}$
myst:
  substitutions:
    params:
      vars:
        title: Horizontal Beam
      M: 2.3
      m: 0.8
      L: 4.4
      w: 0.9
---
# {{ params.vars.title }}
A horizontal beam of length $L = {{ params.L }}$ $\rm{m}$ and mass $M = {{ params.M }}$ $\rm{kg}$ has a mass $m = {{ params.m }}$ $\rm{kg}$ and width $w = {{ params.w }}$ $\rm{m}$ sitting at the end of the beam (see the following figure).

<img src="horizontal_beam.png" width=400 alt="An image showing a horizontal beam with length L and mass M connected to a wall by a wall support. On the opposite end, a block of mass m and width w rests on the beam.">

## Part 1

What is the torque $\tau$ of the system about the support at the wall?

### Answer Section

Please enter a numerical value in $\rm{N \cdot m}$.

## Attribution

Problem is from the [OpenStax University Physics Volume 1](https://openstax.org/details/books/university-physics-volume-1) textbook, licensed under the [CC-BY 4.0 license](https://creativecommons.org/licenses/by/4.0/).<br>![Image representing the Creative Commons 4.0 BY license.](https://raw.githubusercontent.com/firasm/bits/master/by.png)