Drag, Momentum, and Center of Mass

This lecture covers the concepts of drag, momentum, and center of mass. It starts by explaining resistive forces such as viscous drag and provides examples of laminar and turbulent drag. The conservation of momentum is discussed, emphasizing that the total momentum of an isolated system remains constant. The lecture also delves into impulse and momentum, defining impulse as the integral of a net force over time. The center of mass is introduced as the 'average' position of a system weighted by mass, and its kinematics are explored. The importance of applying forces at the center of mass is highlighted, along with the separation of internal and external forces. Various conceptual questions and demonstrations further illustrate these physical principles.