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Thread: Vector Addition and Subtraction

  1. #1 Vector Addition and Subtraction 
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    Hello,

    I need to plan and perform 'vector additon and subtraction' for a class. I do not know how I am suppose to do this, needs to be a first hand investigation. I understand vectors, just do not know how I could possibly demonstrate the addition and subtraction of it?

    Any help would be great

    Thanks


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  3. #2 Vector addition 
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    http://www.glenbrook.k12.il.us/GBSSC...ors/u3l1b.html

    Just type 'vector addition' into your search engine. or use the above link.


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  4. #3 Re: Vector addition 
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    Quote Originally Posted by billco
    http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/vectors/u3l1b.html

    Just type 'vector addition' into your search engine. or use the above link.
    I understand the theory of it, I can do it on paper...just am unsure on how to do a practical experiement.
    Thanks
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  5. #4  
    Forum Isotope Zelos's Avatar
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    http://en.wikipedia.org/wiki/Vector_%28spatial%29
    if you are using a octhanal(spelled?) vector system it simply is
    V<sub>1</sub>=(x<sub>1</sub>,y<sub>1</sub>,z<sub>1</sub>)
    V<sub>2</sub>=(x<sub>2</sub>,y<sub>2</sub>,z<sub>2</sub>)

    then

    V<sub>1</sub> + V<sub>2</sub> = (x<sub>1</sub> + x<sub>2</sub>,y<sub>1</sub> + y<sub>2</sub>,z<sub>1</sub> + z<sub>2</sub>)
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  6. #5  
    Forum Professor wallaby's Avatar
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    i'm a math student and our teacher went through complex numbers with us first without explaining vectors so it wasn't a big jump to vectors.
    but for vector addition he used the triangle method to graphically display it. imediately thereafter the form of representing vectors as collumn matrices was shown and we were told that the rules for matrix addition applied.

    thats how i have been tought and i'm sure i have a reasonably good fix on it.
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  7. #6  
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    This is for Yr11 Physics, do you do vectors in maths aswell? I saw an experiement that demonstrated it by position three strings with different masses tied to each end, and somehow this shows vector addition and subtraction (no idea how).
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  8. #7  
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    Quote Originally Posted by petehdd
    This is for Yr11 Physics, do you do vectors in maths aswell? I saw an experiement that demonstrated it by position three strings with different masses tied to each end, and somehow this shows vector addition and subtraction (no idea how).
    right physics, should have guessed that being in the physics forum, ohh well.
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  9. #8  
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    I really do need to work out what I can do. Has anyone done anything like this?
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  10. #9  
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    I did some searching on the net, I think I will be able to do it using a Force Table. I will be able to show the addition of three different weights at different angles. However how do you show a vector subtraction using a force table?
    I have never used a force table before (or even seen one in fact), is it an easy proces?

    Thanks
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