Fixing My 25-Year Physics Mistake (10:12)

AP Physics C

Lecture Notes

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AP Physics 1

After 25 years of teaching physics, I realized I had been wrong about when you can use the equation Work due to nonconservative forces = Change in mechanical energy. In this video, I break down my mistake, show the correct way to think about conservative and nonconservative forces, and explain how this equation actually works, even when external forces are doing work on the system. Join me, Mr. P from Flipping Physics, as we dive into work, energy, friction, tension, and the physics behind when this powerful equation truly applies.

Chapters:
0:00 Introduction
0: 26 The Example
2:04 Why Net Work = ΔKE can be used
3:40 W_NC = ΔME & W_friciton = ΔME
6:45 Another Nonconservative Force Definition
8:25 W_NC = ΔME can be used

• Thank you to Gerardo Garcia and the rest of my wonderful Patreon supporters.​
• Thank you to Jess Narkiewicz, Christopher Becke, and Julie Langenbrunner for being my Quality Control Team for this video.

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