This lecture covers the concept of dynamic torsors in solid dynamics, discussing the amount of acceleration, moments resulting in rotation, and the fundamental principle of dynamics. It also explores vector coordinates of torsors and general theorems of mechanics, including the dynamic moment theorem and the angular momentum theorem. The lecture further delves into the application of the fundamental principle of dynamics in non-Galilean repositories, addressing inertia forces and the formalism of dynamic equilibrium. The instructor emphasizes the importance of understanding torsors in analyzing the dynamics of solids.