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Author: gulfcoastfella
Time: 12/14/11 06:35 PST
This is a reply to message no. 6048 by james007
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Rotation as a vector

Hey James,

Despite having direction and magnitude, angular displacement is not a vector.  I learned this from a Dynamics/Mechanincs textbook, but can't remember which book it was.  Though I would never rely exclusively on Wikipedia for physics definitions, Wikipedia's agreement "backs up" what I learned. 

Interestingly, though angular displacement is not a vector, angular velocity and acceleration both are.

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