Beam deflection and bending moment relation

This lecture covers the deformation of the neutral axis in beams described by the deflection function w(x). It explains the relation between bending moment and deflection, considering the quadratic moment of inertia and modulus of young. The lecture also discusses the continuity and boundary conditions for beams with non-constant sections, as well as the principle of superposition for beam deflection. Various edge conditions and stresses in beams are analyzed, emphasizing the importance of correctly interpreting signs in formulas.