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Homework Help: Angular Momentum

  1. Apr 6, 2013 #1
    1. The problem statement, all variables and given/known data

    I am just confused about Angular momentum.

    2. Relevant equations


    KE(rotational)= 1/2Iw^2
    Angular momentum= Iw
    3. The attempt at a solution

    Why can I do the change in KE rotational to calculate the her final angular velocity in 3 revs?
    very confused!! :( both equations relate to moment of inertia and angular velocity.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Apr 6, 2013 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Only angular momentum is conserved here. That's all you need.
     
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