This lecture covers the concept of spherical coordinates, including the trajectory equation, reference frames, and circular motion. It explains the derivation of vectors, velocity, and acceleration in spherical coordinates, as well as the uniform circular motion. The instructor discusses the intrinsic equation of the trajectory, parametric equations of motion, and the differentiation of vectors in rotation with constant norm. The presentation also delves into the equations of motion in one dimension, rectilinear uniform motion, and uniformly accelerated motion. The lecture concludes with the discussion of the trajectory equation and the trace of displacement.