Re: postion, velocity and aceleration ...

[Herbert Voss]

Osvaldo Fornaro wrote:
> 
> Hi,
> 
> I need to write r , r dot (r with a dot above it) and r dot dot (r with
> a double dot above it) representing a first and a second derivate of a
> vector in math mode.

in texmode

\dot{\vec{r}}  is first derivation of vector r
\ddot{r}       is second derivation of r

HErbert

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