Spinning, Tumbling, & Wobbling

  • Due Sep 29, 2016 at 8:59am
  • Points 2
  • Questions 2
  • Available until Sep 29, 2016 at 8:59am
  • Time Limit None
  • Allowed Attempts Unlimited

Instructions

Watch the following video tutorial on the various types of rotation possible for objects and characters.
http://youtu.be/qdqWXPLNx7Y

[PDF of Slides]

Summary:

• An object thrown in the air may spin or tumble depending on its shape and axis of rotation.
• By the Tennis Racket Theorem, spinning occurs when the rotation axis is along the object’s long axis or its short axis.
• Tumbling is the irregular turning motion that occurs if the middle axis is the axis of rotation.
• Symmetric objects, such as disks, don’t have a middle axis so they don’t tumble. However, they can wobble as they spin.
• Spin and wobble frequencies are linked and their ratio depends on the shape of the object.
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