Path: ...!news.mixmin.net!weretis.net!feeder8.news.weretis.net!fu-berlin.de!uni-berlin.de!news.dfncis.de!not-for-mail From: wugi Newsgroups: sci.physics.research Subject: Re: The SR between reality and appearance Date: 9 Apr 2024 07:00:40 GMT Organization: A noiseless patient Spider Lines: 32 Approved: hees@itp.uni-frankfurt.de (sci.physics.research) Message-ID: References: X-Trace: news.dfncis.de qqIcCHPzOie84J0g0n2mtADxD5dKbDyQEtma4K8t8Td6alyj5YhNVIx4eWYmCVOnlV Cancel-Lock: sha1:UvJvKj2L++FPLYnp79RmdkyJ0Y0= sha256:KY2uY64e0fiJP1Ef426pUpsoBl2v7beRz5Nsxmd/Ej4= Bytes: 2131 Op 8/04/2024 om 8:54 schreef Luigi Fortunati: > wugi il 04/04/2024 23:24:16 ha scritto: >>> I am so naive that I have always believed that the man on the in >>> movement carousel feels the rotational force of the carousel and not >>> that of the Earth + Universe. >> >> (A late one). He feels the reaction force by Earth+Universe upon the >> carousel's rotational action, transmitted through the carousel's >> foundation and its own stiffness. > > What does the reaction force of the Earth+Universe to the rotating > action of the carousel have to do with the man on the carousel? > > The man on the spinning carousel acts-reacts only with the carousel, > not with the Earth+Universe! > >> Compare with the water in the bucket, which doesn't feel the bucket's >> swinging action, but rather the reaction upon the bucket by the rope, by >> the hand, by the person swinging the bucket around, by the floor >> retaining his feet, by Earth, ... > > Here too, the only force that the water in the bucket feels is the > force of friction with the walls of the bucket and not that of the > hands, the rope or the Earth+Universe. Better back to your drawing board. Litterally. Try to draw all intervening action/reaction pairs and check if you haven't sent some force to "nowhere" ;) -- guido wugi