diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/20.n1/20.fr/ 20.overview/cheatsheet.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/20.n1/20.fr/ 20.overview/cheatsheet.fr.md
index 20651dcd8..078bd40fa 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/20.n1/20.fr/ 20.overview/cheatsheet.fr.md	
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/20.n1/20.fr/ 20.overview/cheatsheet.fr.md	
@@ -12,4 +12,24 @@ lessons:
 
 #### Mécanique classique, n1, synthèse
 
-------------------------------------
\ No newline at end of file
+------------------------------------
+
+transformation de Galilée
+
+<!-------------------------------------------------
+![](cadre-physique-galilee-transformation.gif)   
+![](cadre-classical-physics-referenciel-1-n1_L1200.jpg)
+-------------------------------------------------->
+
+![](cadre-classical-physics-gallilei-transformation-2_v2_L1200.gif)   
+![](cadre-classical-physics-referenciel-1-n1_v2_L1200.jpg)   
+_simple flèche pour le niveau 1_
+
+![](cadre-classical-physics-gallilei-transformation-3_v2_L1200.gif)   
+![](cadre-classical-physics-referenciel-2-n1_v2_L1200.jpg)   
+_simple flèche pour le niveau 1_
+
+
+![](cadre-classical-physics-gallilei-transformation-1_v2_L1200.gif)   
+![](cadre-classical-physics-referenciel-1-n1_v2_L1200.jpg)   
+_simple flèche pour le niveau 1_