1. Limited time only! Sign up for a free 30min personal 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!

How to pick theta while resolving vector.

  1. May 12, 2010 #1
    1
    ucmpro1-2.jpg
    --------------------------------------------------------------------------------
    2
    ucmpro-1.jpg

    how to pick theta (angle between the vector and the component) above two which one is the right choice. i'm confused regarding choosing (theta).. what are the criteria that to be considered while choosing the angle.

    from the above with my choice of theta the component changes hence the equations.

    plz help me :)
     
  2. jcsd
  3. May 12, 2010 #2

    Doc Al

    User Avatar

    Staff: Mentor

    It looks like you are trying to find the radial or the tangential component of some vector. It doesn't matter which angle you use, as long as you use the correct trig function to find the component. If you use the angle with respect to the radius, then the radial component will be Xcosθ; but if you use the angle with respect to the tangent, then the radial component will be Xsinθ. (I'm only concerned with the magnitude of the component; you'll need to add the correct sign, of course.)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: How to pick theta while resolving vector.
Loading...