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## 7.4 Position, Velocity, and Acceleration

### 7.4.1 Cartesian Coordinates

The Cartesian coordinate system uses the coordinate axis vectors ${\stackrel{\to }{e}}_{x}$, ${\stackrel{\to }{e}}_{y}$, and ${\stackrel{\to }{e}}_{z}$ which are independent of time and independent of the position vector $\stackrel{\to }{s}$ (see Fig. 7.4a). In the Cartesian coordinate systems, the position vector $\stackrel{\to }{s}$, the velocity vector $\stackrel{\to }{v}$, and the acceleration vector ...

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