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

Is spin angular momentum increasing in a gyroscope?

  1. Jan 12, 2014 #1
    In my textbook there is an equation for the precession frequency:

    Ω = τ/Iω

    The derivation in the book shows no difference in the spin angular momentum at time t = 0 and t = delta t but when I tried it I got that the denominator of the above equation must be the 'new' angular momentum (at t = delta t)

    If the spin angular momentum is increasing with time wouldn't that means the precession frequency would be decreasing but my textbook says constant velocity

    :confused:
     
  2. jcsd
  3. Jan 16, 2014 #2
    I'm not sure what you are asking, but angular momentum is conserved, so it can't increase without some external torque. The moment of inertia could change if the gyroscope changes shape, but the angular momentum should stay constant, or be slowly decreasing due to friction.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Is spin angular momentum increasing in a gyroscope?
Loading...