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Homework Help: Angular Momentum of plates

  1. Dec 22, 2011 #1
    1. The problem statement, all variables and given/known data
    The bent plate has a mass of 70kg per square meter of surface area and revolves about the z-axis at the rate w=30rad/sec. Determine the angular momentum H of the plate about the z-axis. (Neglect the mass of the hub and the thickness of the plate)

    http://img839.imageshack.us/img839/9853/angularmomentum.jpg [Broken]

    2. Relevant equations
    w=w k

    3. The attempt at a solution
    Splitting the bodies into various parts and calculating. However, as it is about the axis, and not the point, confused.
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Dec 22, 2011 #2
    You would use the parallel axis theorem to move the moments of inertia from centroidal points to the axis of rotation. Then determine the angular momentum.
  4. Dec 22, 2011 #3


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    Show us what you actually did. It's hard to figure out what's confusing you if all you give us is a vague description of what you tried.
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