Somersaults & Twists

  • Due Nov 3, 2016 at 8:59am
  • Points 2
  • Questions 2
  • Available until Nov 3, 2016 at 8:59am
  • Time Limit None
  • Allowed Attempts Unlimited

Instructions

Watch the following video tutorial somersaults, twists, and other rotations performed by jumping characters.
https://youtu.be/fisebc9s3Js

[PDF of Slides]

Summary:

• Rotation can be sped up or slowed down by changing a character’s pose.
• Somersaults, twists, and cart-wheel turns may be stable spins or unstable tumbles depending on the character’s pose.
• The axis of rotation can change by changing a character’s pose.
• Rotations are usually created by a torque but a character can turn without a torque.

Have a question? Go here. 

Optional: Watch this video on cat twists:

http://www.youtube.com/watch?v=RtWbpyjJqrU

 Optional: Read this news article on the history of the cat twist problem:

https://www.washingtonpost.com/news/animalia/wp/2016/11/04/scientists-just-cant-stop-studying-falling-cats/

The animation below (from the above article) illustrates how the angular momentum (L) of the cat is zero when you add up the three parts (upper torso twist + lower torso twist + body rotation).

 Cat twist gif.gif

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