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typeracer

Pit Stop

Record your races with a typeracer account:

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Racer Dom (domhellyeah)
Race Number 56
Date Sun, 5 Mar 2017 15:58:41 +0000
Speed 66 WPM Try to beat?
Accuracy 89.7%
Rank 2nd place (out of 5)
Opponents exploiter911 (5th place) shayan98 (1st place) yeechi (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)