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Inertia of rolling objects

  1. Dec 30, 2009 #1
    Among a hoop, disk and solid sphere of the same radius, which - without slipping - would descend an inclined plane fastest?
  2. jcsd
  3. Dec 31, 2009 #2


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    My guess: All the same speed.
  4. Dec 31, 2009 #3
    From what I recall, from fastest to slowest:

    1. Any solid Sphere
    2. Any solid cylinder
    3. Any hollow sphere
    4. Any hollow cylinder
  5. Dec 31, 2009 #4
    Solid sphere - lowest moment of inertia of the figures listed.
  6. Dec 31, 2009 #5
    And I thought I could fool you guys by putting a little spin on the question.:wink:
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