Keywords: Duhem Statique ch 2 fig 9.jpg en Fig 9 Leonardo da Vinci's second explanation of the forces on an inclined plane He noted that the force of the moving body toward the center of the earth represented by the line of force located at the object's center of gravity could be decomposed into two forces normal to and along the inclined plane Les Origines de la Statique 1905-1906 Pierre Duhem 1905 PD-old-auto-1996 France 1996 Works by this author may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works 1916 Mechanical diagrams Manuscripts of the Bibliothèque de l'Institut de France Pierre Duhem |