Uploaded March 2024 | Updated September 2026, 1 week ago

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Response to Peter Leane...
"Foucault Pendulum for Advanced Experimenters 7"
Peter Leane
youtu.be/L4XQaVO2FkE?si=a8KI_fTbpaOQWcHK

Why does a plumb bob hanging from a turntable wobble when the table turns?
Why doesn't a plumb bob hanging from the ceiling wobble when the Earth turns?

Jump Ahead:
00:00 Intro
02:55 Discussion of Gravity on a 3D Simulation
03:55 Tangent: What if you don't believe in the globe or gravity?
07:26 Plumb Bobs hang in the direction of Gravity
08:41 What Happens to the Gravity Vector when Earth Rotates?
10:30 Why does the Plumb Bob on the Turntable Wobble?
12:30 What if we Misalign the Turntable a little?
13:58 Look at the mounting point where the plumb bob hangs
14:55 Looking at the mounting point in Peter Leane's set up
15:42 Rotating with the Earth doesn't cause this wobble
16:32 The Turntable isn't Really a Great Analogy of a Foucault Pendulum
18:00 Summary

"Link in the Doobly-Doo"
youtube.com/@ScienceAsylum