Variable Mass System and Accelerated Frames

This lecture covers the concept of variable mass systems and accelerated frames, discussing the laws of absolute and relative motion, forces of inertia, and the interpretation of physical effects in different reference frames. Topics include forces like Coriolis, centrifugal, and Euler forces, as well as the dynamics of pendulums in accelerated trains, apparent weight in elevators, and the behavior of objects in rotating reference frames. The instructor explains the equations of relative motion, the effects of acceleration on pendulums, and the forces involved in centrifuges. Practical examples such as chains falling in free fall and pendulums on rotating doors are also analyzed.