AP Physics 1 Unit 2b: Stumbling Blocks
Universal Gravitation, Spring Force, and Circular Motion (11:47)
Struggling with tricky topics from the second half of AP Physics 1 Unit 2? In this video, we tackle common misconceptions about Newton's law of universal gravitation, Hooke's law, static friction, kinetic friction, and centripetal acceleration. You’ll learn when to use each gravity equation, why friction doesn’t depend on surface area, how to find spring displacement from natural length, and why objects in circular motion are always accelerating. Perfect for students preparing for the AP Physics 1 exam who want to build strong conceptual understanding and avoid common mistakes.
Want to crush the AP Physics 1 exam? This lesson is a free portion of my AP Physics 1 Ultimate Review Packet — a comprehensive, student-friendly guide with clear explanations, worked examples, practice problems, and helpful tips covering every unit of the AP Physics 1 curriculum.

Chapters:
0:00 Introduction
0:15 Two Force of Gravity Equations
3:11 Force of Friction
6:58 Spring Natural Length
8:56 Centripetal Acceleration
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  • Thank you to Nick Gillies, Patti Ego, Julie Langebrunner, and Christopher Becke for being my Quality Control Team for this video.
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