Lecture
This lecture covers the concept of solid rotation around a fixed axis, focusing on the direction of forces, moment of inertia, and the application of the Huygens-Steiner rule to calculate the moment of inertia about a parallel axis. The instructor explains the relationship between angular momentum, moment of inertia, and external forces, emphasizing the importance of symmetry in determining the direction of angular momentum. Various examples, such as balancing wheels and homogeneous bars, are used to illustrate the theoretical concepts.