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Homework Help: Vector 2

  1. Sep 7, 2009 #1
    Determine, using the vector components, the module of the vector sum of the four vector data in the figure.
    Consider = 3V2 inches, b = 3 cm, c = 6 cm and d = 5 cm.
    Adopt: sin α (alpha) = 0.60; cos α (alpha) = 0.80 and
    sin 45 degrees = cos 45 degrees = V2/2

    http://img233.imageshack.us/img233/5909/sssfv.jpg [Broken]
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 7, 2009 #2
    If you are looking for help, please show an attempt at the solution. Don't just post the question and expect it to be answered.

  4. Sep 7, 2009 #3


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    Do you mean that the length of vector a is [itex]3\sqrt{2}[/itex] inches? And why in the world would one length be given in "inches" and the other in "cm"? Are you sure a is not [itex]3\sqrt{2}[/itex] cm as well?

    Since the problem says "using the vector components", what are the vector components of the four vectors?
  5. Sep 8, 2009 #4
    I'm sorry, google translate :(
    a = 3V2 cm , b = 3 cm, c = 6 cm e d = 5 cm.

    sen α (alpha) = 0,60; cos α (alpha) = 0,80; e sen 45 graus = cos 45 graus = V2/2

    And CFDFEAGURU, I don't know how to do this question, please if anyone knows how to do please tell me. I have the answer, but I don't know how to do.

    The answer is 4.
  6. Sep 8, 2009 #5
    Add up all the x-components of the vectors and then add up all the y-components of the vectors.
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