steven comments on Mach's Principle: Anti-Epiphenomenal Physics - Less Wrong

18 Post author: Eliezer_Yudkowsky 24 May 2008 05:01AM

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Comment author: steven 24 May 2008 10:41:20AM 3 points [-]

Water will climb up the walls of the bucket, from centripetal force

corresponding exactly to the centripetal force of spinning your arms while the universe stood still around you

In both of these cases you mean the centrifugal ("fleeing the center") force, I think. In the case of the bucket, the centripetal ("seeking the center") force would be the force exerted by the bucket walls and the water itself on the water, "trying" to push it back to the middle of the bucket. In the case of your arms, the centripetal force would be the force exerted inward by the molecular bonds that keep your arms attached to your body.