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!

Intro physics question involving magnitudes and vectors

  1. Oct 2, 2014 #1
    You’re hanging from a chinning bar, with your ;arms at right angles to each other. The magnitudes of the forces exerted by both your arms are the same, and together they exert just enough upward force to support your weight, 620 N. (a) Sketch the two force vectors for your arms, along with their
    resultant, and (b) use components to find the magnitude of each of the two “arm” force vectors.

    So i drew the triangles out with 310 across the x axis and 620 down.

    The 90 degree angle as well as the two 45`s . I went to find the H which is cos 45= O/H , multiply by H on both sides so its H*cos45= 310 divide both by cos 45 which leaves you with H=310/cos45 which leaves with 438 N as the resultant. That is what i did anyway I dont think i am correct but if someone could give this a peak.
     
  2. jcsd
  3. Oct 2, 2014 #2

    BvU

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Want a second opinion ? You're still correct !
     
  4. Oct 2, 2014 #3
    lol they said i needed to follow the posting guidelines
     
  5. Oct 2, 2014 #4

    BvU

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Still true: use the template (you should also READ the guidelines ;-) )
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Intro physics question involving magnitudes and vectors
  1. Intro physics question (Replies: 2)

  2. Intro Physics question (Replies: 7)

Loading...