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Then those values are displayed in the browser window as shown in Figure 16 .

Now let's fix the problem

We said earlier that we can cause the tent pole to be in equilibrium by adding one additional 10-newton force at an angle of 315 degrees. We can easilyaccomplish this by making the changes shown in Figure 17 to the code in Listing 1 .

Figure 17 . Changes to Listing #1. .
Change the code that reads: while(ang<= 270){ to readwhile(ang<= 315){

This change will cause one more 10-newton force vector at an angle of 315 degrees to be added to the sum of the vectors.

Make the change

Make that change and open the modified html file in your browser. When you do, the text shown in Figure 18 should appear in your browser window.

Figure 18 . Screen output for modified Listing #1.
Start Script The resultant is:Magnitude = 0.00 Angle = 198.43End Script

Magnitude of resultant vector is zero

The significant thing about Figure 18 is that the magnitude of the resultant vector is now 0, which satisfies the requirement for equilibrium stated earlier .

Pay no attention to the angle shown in Figure 18 . It is meaningless. It is not possible to compute a valid angle for a vector that has a magnitude ofzero.

Run the scripts

I encourage you to run the script and perform the calculations that I have presented in this lesson to confirm that you get the same results. Experiment withthe code and the calculations, 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: Force -- Vector Solutions for Coplanar Forces Concurrent at a Point
  • File: Phy1100.htm
  • Revised: 10/02/15
  • Keywords:
    • physics
    • accessible
    • blind
    • graph board
    • protractor
    • screen reader
    • refreshable Braille display
    • JavaScript
    • trigonometry
    • coplanar forces
    • law of sines
    • law of cosines
    • parallelogram rule
    • triangle rule
    • resultant
    • equilibrium

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 isa copy of a collection that is freely available 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

important of enocomic
Adu Reply
what is division of labour
Dennis Reply
division of labour can be defined as the separation of task to individuals in any economic system to specialize on it.
what is demand curve
Victoria Reply
demand curve is a downward sloping economic graph that shows the relationship between the price of product and the quantity of the product demanded.
What is demand
Frank Reply
It refers to the quantity of a commodity purchased in the market at a price and at a point of time.
refers to amount of commodities a consumer is willing and able to buy at particular price within a period of time
It is the ability and willingness a customer buys a product or service at a particular price, place and time while other things remaining constant or the same
In which case is opportunity cost is zero
Francis Reply
where no alternative is available
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Omar Reply
Adam Smith
Adam Smith
Adam smith
Adam Smith
What is monopoly
Mauthoor Reply
it an economic situation where one individual controls the essential commodities or value product for maximum profit
monopoly is a market situation in which there is only one producer of a good or service which has no close substitutes
is where only one person is solely the price taker
what is Monopoly
Dauda Reply
The word Monopoly is a Latin word. it is the combination of two words-Mono means single and Poly means seller. thus Monopoly means single seller. but this is not the full meaning of Monopoly. Monopoly must produce a product which does not have close substitute in the market.
Monopoly is define as a firm in an industry with very high barriers to entry.
If close substitute is available, Monopoly will be a king without a crown.
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Cbdishakur Reply
what are the differences between monopoly and.oligopoly
Onome Reply
what are the difference between monopoly and oligopoly
The deference between Monopoly and Oligopoly: Monopoly means:A single-firm-Industry producing and selling a product having no close business and Oligopoly means:A market structure where a few sellers compete with each other and each controls a significant portion of market .
so that the price-output policy one affects the other.
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what is economic
Emakpor Reply
what is economic
the word economic was derived from the Greek word oikos (a house)and mein(to manage) which in effect meant managing a household with the limited funds available 🙂.
good excample about scarsity
An Enquiry into the nature and causes of wealth Nations, this book clearly defined what economic is🙂🙂🙏🙏 thank you...
good example about scarcity: money,time, energy, human or natural resources. Scarcity of resources implies that there supply is very much limited in relation to demand.
equilibrium is a situation in which economic forces such as demand and supply are balanced and in the absence of external influences,the value of economic variables will not change
Onome Reply
marginal cost and marginal revenue is equilibrium .
what is equilibrium
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policy prescriptions for unemployment
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Am working on it
what are the factors effecting demand sedule
Kalimu Reply
we should talk about more important topics, you can search it on Google n u will find your answer we should try to focus on how we can improve our society using economics
so good night
Why do people buy more grapes in December than in July?
because at time know money
While the American heart association suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension
Beverly Reply
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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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