Lecture
This lecture covers the concept of lever arms to understand the moment of a force, characterizing the potential of a force to rotate an object. It also delves into the Montsénétique theorem for multiple interacting point masses, emphasizing the distinction between systems of point masses and solid bodies. The instructor explains the importance of distinguishing external and internal forces, providing examples to clarify the concepts. The lecture concludes with a demonstration illustrating the conservation of momentum and the moment of the center of mass for various systems.