It’s cold right now so I place my hands between my legs and rub them together – back and forth vigorously. The friction warms my hands, but my body slowly rotates to the right. Whenever I do this, I rotate to the right, never to the left. I tried a different bar stool, same thing…

Why?

Does being right-handed have anything to do with it?
I:
I kneel on the barstool, then sit down on the backs of my shins/ankles. From this position, my legs won’t reverse.
Magdalena:
I just tried one static hand, and then the other. Regardless of whether both hands move, the left one moves only or the right one moves only, the barstool still travels slowly to the right – about the speed of a second hand if I rub vigorously. By 15 seconds, my hands are too hot to continue.
I:
If I hang my legs off the front of the barstool (sit normally) this anomaly doesn’t occur.
Larrybud:
That idea has merit, but it’s pretty basic. An upper plate and a lower plate, both with greased channels, and inbetween are large ball bearings – about 1/4" diameter.
I’ll try to devise a test to see if the barstool will rotate the same speed and distance in both directions with the same force applied.


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