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!

Is torque required to change angular momentum?

  1. Jun 4, 2007 #1
    is torque required to change angular momentum?
  2. jcsd
  3. Jun 4, 2007 #2
    unless newton's first law of motion doesn't hold as far as advanced physics is concerned i'm gonna have to go with yes
  4. Jun 4, 2007 #3


    User Avatar
    Homework Helper

    Yes if one considers the N1 analogy

    [tex]\tau = I \alpha[/tex]

    which implies if the torque is zero that the angular acceleration will also be zero giving no change in angular speed.

    One can object and say - what about internal forces changing the moment of inertia of an object? In such instances it is found that the angular speed adjusts to keep the angular momentum of the object constant.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Is torque required to change angular momentum?