De Beghinselen der Weeghconst

De Beghinselen der Weeghconst, published in 1586 by Flemish mathematician Simon Stevin, is a foundational work in statics and hydrostatics. The book introduced the theorem of the triangle of forces, which significantly advanced the study of statics by providing a new framework beyond the theory of the lever. Stevin also demonstrated that the pressure exerted by a liquid depends only on its height and base, not the shape of its container. This work contributed to refuting the Aristotelian idea that heavier objects fall faster than lighter ones, as Stevin's experiments showed objects of different weights falling at the same rate.12