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Homework Help: Vector addition of forces

  1. Sep 22, 2010 #1

    Suy

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    1. The problem statement, all variables and given/known data
    [PLAIN]http://img138.imageshack.us/img138/918/79095797.png [Broken]
    Find AE resultant force


    2. Relevant equations



    3. The attempt at a solution
    I don't know where to start, I can find some of angle, but still I don't get it,
    Also this question is in my test, I remember the question said AB exerted force on AE resultant force something
    thx
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 22, 2010 #2
    I'm assuming AD and AE are acting downwards (like a weight hanging).

    So, firstly, resolve force AC into it's horizontal and vertical components.

    You can show the component forces of AE and AD as well to make it easier.

    Then, draw a free body diagram showing the direction each force is acting in.

    From there, you should be able to resolve this system.
     
  4. Sep 24, 2010 #3

    Suy

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    I tried to get all component for ABC, AB is already given 8N horizontal ,6.645 vertical
    but still, it's doesn't help me to get AD
    btw, this question is similar to this picture
    http://session.masteringengineering.com/problemAsset/1162411/1/Probs.2-7_8.jpg
    replace the black stick with blue part
    also, I am in chapter 2.1-2.3, just click the link , you will see it
    http://books.google.ca/books?id=JFuUEoT0iIUC&printsec=frontcover#v=onepage&q&f=false
    I think I have to use parallelogram to do it?
     
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