FE Civil Exam Prep 30, Centroids, Moments of Inertia, and Friction

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - To calculate composite centroids by treating removed sections as negative areas in the weighted average summation. - The parallel axis theorem, I = Ic + Ad², is essential for finding the moment of inertia of composite shapes, where 'd' is the distance from the component's centroid to the overall composite centroid. - That static friction is a variable force up to a maximum (μsN), while kinetic friction is a constant value (μkN) once motion begins. - To always check if the applied force overcomes maximum static friction before applying the kinetic friction formula. - In the belt friction formula, T2/T1 = e^(μβ), the wrap angle β must be converted from degrees to radians. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep