Jean le Rond d'Alembert

Jean le Rond d'Alembert was an 18th-century French mathematician and physicist known for his contributions to mechanics. He formulated d'Alembert's principle, which states that the sum of the forces and inertial effects on a system in motion is zero. This principle helps bridge classical mechanics and more advanced fields like Lagrangian and Hamiltonian mechanics, which focus on energy and momentum. His work laid foundational concepts in continuum mechanics and fluid dynamics, influencing how we understand motion and forces in various physical systems, from simple objects to complex fluids.