# 2.7 Game 2302-0370 motion -- uniform and relative velocity  (Page 11/11)

 Page 11 / 11

Screen output

The text shown in Figure 9 should appear in your browser window when the html file is opened in your browser.

Figure 9 . Screen output for Listing #4.
```Start Script Platform velocity magnitude = 3.70 miles/hourPlatform velocity angle = 22.50 degrees Man velocity magnitude = 4.83 miles/hourMan velocity angle = 45.00 degrees End Script```

Analysis of the code

The velocity of the platform relative to the ground is the vector sum of the ship's velocity and the velocity of the platform relative to the ship. The man's velocity is the vector sum of theplatform's velocity relative to the ground and the man's velocity relative to the platform.

Listing 4 begins with copies of the getAngle function and the vectorSum function, which I have already explained. This discussion begins at the commentthat reads "Main body of script begins here."

The main body of the script

The main body begins with the declaration and initialization of six variables whose contents represent the magnitude and the angle of the ship, theplatform, and the man.

Add the first two vectors

The vectorSum function is called to add the ship's velocity vector (relative to the ground) and the platform'svelocity vector (relative to the ship). The resultant vector produced by adding those two vectors is stored in the array-object variable named platformVel for use later. This is the platform's velocity vector relative to the ground.

Add the man's vector to the sum

Then the vectorSum function is called again to add the platform's velocity vector (relative to the ground) andthe man's velocity vector (relative to the platform). Note that the two values stored in the platformVel array object are extracted and passed as parameters to the vectorSum function.

The resultant vector produced by that addition is saved in the array-object variable named manVel . This is the man's velocity vector relative to the ground.

Display the results

Finally, the method named document.write is called four times in succession to extract and print the four values stored in the two array objects, producing thetext output shown in Figure 9 .

## 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 into atext file with an extension of html. Then open that file in your browser. Experiment with the code, making changes, and observing the results of your changes. Makecertain that you can explain why your changes behave as they do.

## Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
• Module name: GAME 2302-0370 Motion -- Uniform and Relative Velocity
• File: Game0370.htm
• Published: 10/13/12
• Revised: 02/01/16
Disclaimers:

Financial : Although the Connexions site makes it possible for you to download a PDFfile for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should be aware thatsome of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.comshowing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, pleasebe aware that it is a copy of a module that is freely available on cnx.org and that it was made and published without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

-end-

#### Questions & Answers

are nano particles real
yeah
Joseph
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Lohitha
where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
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da
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Bhagvanji
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Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
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Kamaluddeen
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narayan
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
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Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
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Alexandre
what is the stm
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Rafiq
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Damian
How we are making nano material?
what is a peer
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What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
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Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
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Mahi
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
Rafiq
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Anam
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Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
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