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typeracer

Pit Stop

Record your races with a typeracer account:

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Racer John (typist426)
Race Number 5625
Date Thu, 16 Mar 2017 04:04:18 +0000
Speed 71 WPM Try to beat?
Accuracy 96.7%
Rank 1st place (out of 5)
Opponents alexqman (4th place) andrewhey (3rd place)

Text typed:

In two dimensions we say that a rigid body has only one rotational degree of freedom, whereas in three dimensions we say that a rigid body has three rotational degrees of freedom. This might lead you to infer that in three dimensions you need to have three scalar quantities to represent a body's rotation. Indeed, this is the minimum requirement.
Physics for Game Developers (book) by David M Bourg (see stats)