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M3P2
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3f3e0180
Commit
3f3e0180
authored
Aug 30, 2020
by
Claude Meny
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Update textbook.fr.md
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3f3e0180
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@@ -231,6 +231,28 @@ is the scalar line element $`dl_x`$, so the vector $`\overrightarrow{e_x}`$ writ
$
`\partial\overrightarrow{OM}_y=\overrightarrow{dl_y}=dl_y\;\overrightarrow{e_y}=dy\;\overrightarrow{e_y}`
$
<br>
$
`\partial\overrightarrow{OM}_z=\overrightarrow{dl_z}=dl_z\;\overrightarrow{e_z}=dz\;\overrightarrow{e_z}`
$
*
**N3 ($`\rightarrow`$ N4)**
<br>
[
ES
]
El elemento vectorial de línea $
`\overrightarrow{dOM}=\overrightarrow{dl}`
$ en coordenadas cartesianas es
el vector de desplazamiento del punto $
`M(x,y,z)`
$ al punto $
`M'(x+dx,y+dy,z+dz)`
$ cuando
las coordenadas varían infinitamente de $
`dx`
$, $
`dy`
$ y $
`dz`
$, y se escribe :
<br>
[
FR
]
Le vecteur déplacement élémentaire $
`\overrightarrow{dOM}=\overrightarrow{dl}`
$ en
coordonnées cartésiennes est le vecteur déplacement du point $
`M(x,y,z)`
$ au point
$
`M'(x+dx,y+dy,z+dz)`
$ quand les coordonnées varient infinitésimalement des quantités
$
`dx`
$, $
`dy`
$ y $
`dz`
$, et il s'écrit :
<br>
[
EN
]
The vector line element or vector path element $
`\overrightarrow{dOM}=\overrightarrow{dl}`
$
in cartesian coordinates is the displacement vector from point $
`M(x,y,z)`
$ to point
$
`M'(x+dx,y+dy,z+dz)`
$ when the coordinates vary infinitely in quantities $
`dx`
$, $
`dy`
$ y $
`dz`
$,
and it writes :
<br>
<br>
$
`=\overrightarrow{MM'}=d\overrightarrow{OM}=\overrightarrow{dr}=\overrightarrow{dl}`
$
$
`=\partial\overrightarrow{OM}_x+\partial\overrightarrow{OM}_y+\partial\overrightarrow{OM}_z`
$
$
`=\overrightarrow{dl_x}+\overrightarrow{dl_y}+\overrightarrow{dl_z}`
$
$
`=l_x\;\overrightarrow{e_x}+l_y\;\overrightarrow{e_y}+l_z\;\overrightarrow{e_z}`
$
<br>
[
ES
]
y su norma es el elemento scalar de linea :
<br>
[
FR
]
et sa norme el l'élément de longueur :
<br>
[
EN
]
y its norm (or length) is thescalar line element :
<br>
<br>
||
\o
verrightarrow{dl}||=
\s
qrt{dl_x^2+dl_y^2+dl_z^2}=
\s
qrt{dx^2+dy^2+dz^2}
*
**N3 ($`\rightarrow`$ N4)**
<br>
[
ES
]
Los 3 vectores $
`\partial\overrightarrow{OM}_x=\overrightarrow{dl_x}\quad`
$,
$
`\quad\partial\overrightarrow{OM}_y=\overrightarrow{dl_y}\quad`
$ y
...
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