1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Adding Vectors

  1. Feb 18, 2007 #1

    Hello there. In lab, we measured vectors. I'm having a little concern on how to get X and Y. If I follow the books method, R_calc comes out too small compare to measure R. (Big % error).

    15.5+12.4cos37 = 25.4
    0+9.3sin37 = 5.4
    square root of (25.4^2+5.4^2) = 26cm

    If I do it my way, R is a lot closer to measure.

    15.3+12.4= 27.9cm
    0 + 9.3 = 9.3 cm
    square root of (27.9^2+9.3^2) = 29.4 cm

    The measurements (x1/2; y1/2; R m) are pretty accurate. What am I doing wrong? Thanks for any help.
  2. jcsd
  3. Feb 18, 2007 #2


    User Avatar
    Homework Helper

    OK, I will try to point out a couple of things:

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Adding Vectors
  1. Adding Vectors: (Replies: 11)

  2. Adding vectors (Replies: 4)

  3. Adding Vectors (Replies: 1)

  4. Adding Vectors (Replies: 3)

  5. Adding Vectors (Replies: 1)