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Angular velocity with time varying moment

  1. Sep 3, 2014 #1
    Hi there,

    I have been given this question, and I have not even the slightest of clue's where to start.

    I know angular velocity is equal to ω=v/r

    But besides that I have no idea.

    Where can I start?

    Attached Files:

  2. jcsd
  3. Sep 3, 2014 #2


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    Gold Member

    How is it that you have been given a problem that you have no clue how to solve? Is this for a class?
  4. Sep 3, 2014 #3


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Have you studied the terms 'moment of inertia', 'angular acceleration', or 'torque' yet?
  5. Sep 3, 2014 #4
    Here are two clues:
    1) You don't need mb.
    2) You need to perform an integration.
  6. Sep 3, 2014 #5


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    Staff: Mentor

    Please note that I have changed the thread title to make it more descriptive of the subject matter. This is a requirement for the Homework sections of Physics Forums. The thread was moved here (because it is a homework type question) from a section where thread title requirements are not so stringent.

    -- gneill, PF Mentor
  7. Sep 4, 2014 #6
    Ah right I got you guys, thanks for the help. It didn't click to me initially that if i integrate the momentum equation and multiply by 1/Inertia I should get the solution.

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