This week’s episode explores the fundamentals of kinematics, focusing on the position, posture, and displacement of points and rigid bodies in mechanical systems. We begin with how to mathematically define a point’s locus and position using vector notation within fixed and moving reference frames. The discussion then extends to a rigid body’s posture—its combined position and orientation—along with techniques such as loop-closure equations and both graphic and algebraic posture analysis for solving complex mechanisms. The episode also distinguishes between absolute and apparent displacement, explaining how motion can be viewed from different perspectives and how it is composed of translation and rotation.

The content was created using an AI notebook, with material adapted from textbook excerpts and lecture slides to provide a clear and structured learning resource.