Update textbook.fr.md

12.temporary_ins/40.classical-mechanics/30.n3/07.coherence/textbook.fr.md

@@ -121,7 +121,18 @@ $`\quad\Longrightarrow\quad
 
 Loi de composition galiléenne des accélérations :
 
-
+$`\left\{\begin{array}{l}
+dt' = dt \\
+\dfrac{d^2 x'}{dt'^2}=\dfrac{d}{dt}\big(\mathscr{v}_x-V_x\big)\dfrac{d^2 x}{dt^2} \\
+\dfrac{d^2 y'}{dt'^2}=\dfrac{d}{dt}\big(\mathscr{v}_y-V_y\big)\dfrac{d^2 y}{dt^2} \\
+\dfrac{d^2 z'}{dt'^2}=\dfrac{d}{dt}\big(\mathscr{v}_z-V_z\big)\dfrac{d^2 z}{dt^2} \\
+\end{array}\right.`$
+$`\quad\Longrightarrow\quad
+\left\{\begin{array}{l}
+\mathscr{a}_x'=\mathscr{a}_x \\
+\mathscr{a}_y'=\mathscr{a}_y \\
+\mathscr{a}_z'=\mathscr{a}_z
+\end{array}\right.`$