FE Exam Prep 20, SI vs US Customary — lbm vs lbf and the gc Factor

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: - The critical difference between pound-mass (lbm) for mass and pound-force (lbf) for force. - Why and when to use the gravitational conversion factor, gc, which is 32.174 lbm·ft/(lbf·s²). - How to correctly apply Newton's Second Law (F=ma) and energy equations (KE, PE) in US Customary units. - The common exam trap involving weight calculations where local gravity (g) is not equal to standard gravity. - Where to find gc in the NCEES FE Reference Handbook and how to spot questions requiring it. 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