Stability of Equilibrium States

This lecture covers the stability of equilibrium states in mechanical systems, focusing on the principle of superposition and the computation of reaction loads in rigid structures using the virtual work method. It discusses the criteria for stability, different types of equilibrium, and the potential energy as a function of coordinates. The lecture also explores examples of internal loads in trusses and the determination of stability types based on potential energy derivatives. The instructor emphasizes the importance of understanding stability conditions and potential energy variations to analyze equilibrium states effectively.