Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Angular Displacement in Rotational Dynamics

  1. Nov 6, 2005 #1
    Why do we use the angle as the base quantity in rotational dynamics instead of, perhaps, arc length? Is it because angular displacement is easier to measure? Would it make any sense to use arc length?
  2. jcsd
  3. Nov 6, 2005 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    Arc length depends on the radius that you choose, so you always have to indicate the radius you are using that corresponds to that arc length. Angular displacement doesn't.

  4. Nov 6, 2005 #3
    Oh, that makes sense. Thanks!
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Angular Displacement in Rotational Dynamics