How to calculate the precession

naho · May 19, 2015

This is the Anti gravity wheel video from Veritassium. I have a similar problem to calculate the forces on arm.

A man in a navy polo shirt holds a spinning wheel on a horizontal shaft above his head on a grassy field, with sandstone university buildings behind him.

How can I calculate the precession force pushing the arm vertically ?

Lets assume that the angles between shaft and arm is 90° the angles between shaft and wheel is 90°

The wheel properties are
Mass - Mwheel ,
Radius - Rwheel,
Speed(rpm) - Vwheel,

The length of shaft is Lshaft, and mass is Mshaft though to keep it simple we can ignore the mass of shaft.

Diagram of a horizontal shaft pivoting on a vertical blue arm at its left end, with a red wheel at its right end; a red arrow labelled Precession points up, a red arrow labelled Gravity Force points down, and 90° marks sit at both joints.

Doc Al · May 19, 2015

You might want to have a look at Anti-Gravity Wheel Explained.

How to calculate the precession

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