Results 1 to 2 of 2

Thread: Basic Vector Addition Question

  1. #1
    May 2011

    Basic Vector Addition Question

    This question might be too trivial for a linear algebra topic but I am not sure what I am doing wrong.

    Heres the problem. A is 62.0 an Theta is 58.0 Degrees

    I made the triangles and I believe A^y is 29.1 => sin(28) *62.0
    A^x is 54.7. => 29.1/tan(28)

    for B. B^y is 22.47 => sin(58) * 26.5
    B^x is 14.04 => 22.47/tan(58)

    C is simply C^y is -31.0

    So my equations are

    A= 54.7 i + 29.1 j
    B= 14.04 i + 22.47 j
    C= 0 i - 31.0 j

    I wanted to find R^x and R^y and that is simply adding all the related components.

    R^x= 68.74

    I have R^y right but R^x is wrong. Finding the magnitude and angle are easy after that but I am probably getting them wrong from doing R^x wrong. But I keep checking the math and I guess im not seeing something.



    Posted a picture of the vectors
    Follow Math Help Forum on Facebook and Google+

  2. #2
    May 2011
    I believe I got it. I was taking the angle for B in correctly. It should be 180 - 58 to compensate it for being the Q II. Ill go check the answers to see if im right though
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: Mar 22nd 2011, 04:08 PM
  2. Question on Vector Addition
    Posted in the Advanced Algebra Forum
    Replies: 3
    Last Post: Jan 30th 2011, 06:14 AM
  3. Vector Addition Question
    Posted in the Geometry Forum
    Replies: 1
    Last Post: May 29th 2009, 06:28 PM
  4. addition: magnitude of a vector
    Posted in the Calculus Forum
    Replies: 15
    Last Post: Feb 14th 2009, 08:57 PM
  5. Vector addition
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: Dec 8th 2008, 05:51 AM

Search Tags

/mathhelpforum @mathhelpforum