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!

Does only the Tangential momentum count

  1. Aug 24, 2004 #1
    Does only the Tangential momentum "count"....

    When convertering the momentum from linear to angular?
     
  2. jcsd
  3. Aug 24, 2004 #2

    Doc Al

    User Avatar

    Staff: Mentor

    For a particle with linear momentum [itex]\vec p[/itex], its angular momentum about some origin is [itex]\vec L = \vec r \times \vec p[/itex]. So, if I understand what you're asking, the answer is yes.
     
  4. Aug 24, 2004 #3
    So a particle traveling into a disc (thats free to rotate) in an inelastic collision that collides on a path tangent to the disc has all of its momentum converted into angular momentum, whearas a path of 30° with respect to the tanget line would have cos(30) times that angular momentum?
     
  5. Aug 24, 2004 #4

    Doc Al

    User Avatar

    Staff: Mentor

    I'd phrase it a bit differently. (As I don't like saying that linear momentum "converts" to angular momentum.) Let me assume that the axis of the disk is fixed; the disk is free to rotate, but not translate. In any case, prior to the collision the particle has a certain angular momentum with respect to that axis. Yes, the amount of angular momentum it has depends on its direction of motion. During the collision, the angular momentum (of the entire system) does not change. Does this help?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Does only the Tangential momentum count
Loading...