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Screen output

The text shown in Figure 13 should appear in your browser when you open the html file in your browser.

Figure 13 . Screen output for Listing #3.
Hello from JavaScript vecResultMag = 8.11vecResultAng = 90.49 The End

As you can see, the displacement vector is just a little over eight meters at an angle of about 90.5 degrees. In other words, your ending position wasapproximately 8 meters north of your starting position. Hopefully you were able to arrive at a very similar answer using your graph board.

Explanation of the code

The code in Listing 3 is very similar to the code in Listing 2 . However, there is more of it because the code is adding four vectors instead of only 2.

As before, Listing 2 begins with the getAngle method that we developed earlier.

Magnitude and angle for each vector

Then Listing 2 defines eight variables containing the magnitudes and angles of the four segments of the walk.

(Note that the names that I used for the variables in this script are somewhat simpler than the names that I used in Listing 2.)

Horizontal and vertical components

Following that, Listing 2 computes the horizontal and vertical components for each of the four vectors and saves those values in eight different variables.

Sums of components

Then Listing 2 computes and saves the sum of all four horizontal components and computes and saves the sum of all four verticalcomponents.

After that, there is essentially no difference between the script in Listing 3 and the script in Listing 2 .

Other vector operations

In addition to the addition and subtraction of vectors, there are other operations that can be performed using vectors, such as the dot product andthe cross product. However, those operations are beyond the scope of this module.

Non-mirror-image graphics

Figure 14 through Figure 18 below are non-mirror-image versions of Figure 2 , Figure 4 , Figure 6 , Figure 8 , and Figure 10 .

Figure 14 . Non-mirror-image version of the image contained in the file named Phy1060a1.svg.
Missing image
Figure 15 . Non-mirror-image version of the image contained in the file named Phy1060b1.svg.
Missing image
Figure 16 . Non-mirror-image version of the image contained in the file named Phy1060c1.svg.
Missing image
Figure 17 . Non-mirror-image version of the image contained in the file named Phy1060d1.svg.
Missing image
Figure 18 . Non-mirror-image version of the mage contained in the file named Phy1060e1.svg.
Missing image

Run the scripts

I encourage you to run the scripts that I have presented in this lesson to confirm that you get the same results. Copy the code for each script intoa text file with an extension of html. Then open that file in your browser. Experiment withthe code, making changes, and observing the results of your changes. Make certain that you can explain why your changes behave as they do.


I will publish a module containing consolidated links to resources on my Connexions web page and will update and add to the list as additional modulesin this collection are published.


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Motion -- Displacement and Vectors for Blind Students
  • File: Phy1060.htm
  • Revised: 10/01/15
  • Keywords:
    • physics
    • accessible
    • blind
    • graph board
    • protractor
    • screen reader
    • refreshable Braille display
    • JavaScript
    • trigonometry
    • motion
    • rest
    • body
    • displacement
    • velocity
    • acceleration
    • kinematics
    • kinetics
    • resultant
    • subtrahend
    • minuend

Financial : Although the openstax CNX site makes it possible for you to download a PDF file for the collection that contains thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.

You also need to know that Prof. Baldwin receives no financial compensation from openstax CNX even if you purchase the PDF version of the collection.

In the past, unknown individuals have copied Prof. Baldwin's modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing Prof. Baldwin as the author.Prof. Baldwin neither receives compensation for those sales nor does he know who doesreceive compensation. If you purchase such a book, please be aware that it is a copy of a collection that is freelyavailable on openstax CNX and that it was made and published without the prior knowledge of Prof. Baldwin.

Affiliation : Prof. Baldwin is a professor of Computer Information Technology at Austin Community College in Austin, TX.


Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
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Source:  OpenStax, Accessible physics concepts for blind students. OpenStax CNX. Oct 02, 2015 Download for free at https://legacy.cnx.org/content/col11294/1.36
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