Rotation in Two Dimensions

This lecture covers the concept of rotation in two dimensions, starting with a reminder of the vector product and the moment of a force. The instructors explain the statics related to rotation and provide examples such as the corkscrew rule. They also discuss the calculation of the norm of the cross product between two vectors and the conservation of momentum in objects. The lecture delves into the application of external forces to induce motion and explores the conservation of momentum in objects at rest or in uniform motion. Additionally, it addresses the description of rotational movements and the concept of a 'quantity of rotation' in both 2D and 3D perspectives.