0.17 Phy1150: force and motion -- units of force

Table of contents

• Preface
  • General
  • Prerequisites
  • Viewing tip
    • Figures
  • Supplemental material
• Background information
  • Creation of tactile graphics
  • Things can be confusing
  • SI units and the newton
  • A practical example using the Google calculator
  • Other units
    • poundal
    • dyne
  • Acceleration of gravity
    • pound-force
    • gram-force
    • kilogram-force
  • Weight is a force
• Sample problems
  • A static scenario
  • First dynamic scenario
  • Second dynamic scenario
  • Third dynamic scenario
• Do the calculations
• Resources
• Miscellaneous

Preface

General

This module is part of a book (or collection) designed to make physics concepts accessible to blind students. The collection is intended to supplement but not to replace thetextbook in an introductory course in high school or college physics.

This module explains various units of force in a format that is accessible to blind students.

Prerequisites

In addition to an Internet connection and a browser, you will need the following tools (as a minimum) to work through the exercises in these modules:

• A graph board for plotting graphs and vector diagrams ( (External Link) ).
• A protractor for measuring angles ( (External Link) ).
• An audio screen reader that is compatible with your operating system, such as the NonVisual Desktop Access program (NVDA), which is freelyavailable at (External Link) .
• A refreshable Braille display capable of providing a line by line tactile output of information displayed on the computer monitor ( (External Link) ).
• A device to create Braille labels. Will be used to label graphs constructed on the graph board.
• The ability to create tactile graphics as described here .

The minimum prerequisites for understanding the material in these modules include:

• A good understanding of algebra.
• An understanding of the use of a graph board for plotting graphs and vector diagrams ( (External Link) ).
• An understanding of the use of a protractor for measuring angles ( (External Link) ).
• A basic understanding of the use of sine, cosine, and tangent from trigonometry ( (External Link) ).
• An introductory understanding of JavaScript programming ( (External Link) and (External Link) ).
• An understanding of all of the material covered in the earlier modules in this collection.
• An understanding of the creation and use of tactile graphics as described here .

Viewing tip

I recommend that you open another copy of this document in a separate browser window and use the following links to easily find and view the figures while you are reading about them.

Figures

• Figure 1 . SI base units.
• Figure 2 . Examples of SI derived units.
• Figure 3 . Mirror image of the image from the file named Phy1150a1.svg.
• Figure 4 . Non-mirror image of the image from the file named Phy1150a1.svg.
• Figure 5 . Key-value pairs for the image in the file named Phy1150a1.svg.

Supplemental material

I recommend that you also study the other lessons in my extensive collection of online programming tutorials. You will find a consolidated index at www.DickBaldwin.com .

Background information

Creation of tactile graphics

The module titled Manual Creation of Tactile Graphics explains how to create tactile graphics from svg files that I will provide.