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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!local-3.nntp.ord.giganews.com!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Fri, 18 Apr 2025 20:14:19 +0000 Subject: Re: Acceleration. Newsgroups: sci.physics.relativity References: <4OycnbDEC-saDp_1nZ2dnZfqnPednZ2d@giganews.com> From: Ross Finlayson Date: Fri, 18 Apr 2025 13:14:17 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Lines: 190 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-VFi0p31/IKabFniA2d6qR8nAcuUgtrykfDX5f2zlyeDWLEnyqGCshor5vM0Yew1JH2PIVJa0cU9uZKh!D24RRtQ0m12KPinNhrVaiVw9Znd6dnXaPC1kK4bX+Sz3oxFpKbyign5fiRUt/qymibFQ1xvafEw= X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 9123 On 04/18/2025 01:00 PM, Ross Finlayson wrote: > On 04/18/2025 11:52 AM, kinak wrote: >> Ross Finlayson wrote: >>> On 04/18/2025 04:35 AM, kinak wrote: >>>> Ross Finlayson wrote: >>>>> On 04/15/2025 01:32 PM, kinak wrote: >>>>>> >>>>>> 'Acceleration' might mean 'circular motion' >>>>> >>>>> Well, the world is turning, and Archimedes and his lever always >>>>> must have a place to stand, so one may aver that dynamics of >>>>> any sort is always, "un-linear", and that only in the abstract >>>>> mental geometry is the, "linear", that it may always be, >>>>> "un-linear". >>>>> >>>>> Einstein in one of his last books writes another derivation of >>>>> the mass-energy equivalency about the "centrally symmetric". >>>>> It's sort of called "Einstein's bridge", and what it does is >>>>> make it so that the dynamics is always, "un-linear", in the >>>>> abstract mental geometry of the, "linear". >>>>> >>>>> Most people don't know it mostly since they're not taught it. >>>>> Yet, it's there. >>>>> >>>>> -------------------------------- >>>> >>>> Why does the universe swirl. >>>>> >>>>> >>> >>> Why does it change at all? >>> >>> A usual idea of chance is dice-rolling, then the idea that there is >>> chance at all may be called something like "root probabilistic >>> flaw", that probabilities are random at all, while only in the very >>> least infinitesimal amount, allowing change at all, while state at >>> all, and laws at all. >>> >>> >>> Then, "swirl" involves the vorticial and the spiral, and the "wash" >>> of things, about flow and flux. >>> >>> The idea is that spirals go out while vortices go in. >>> >>> Then, something like the sigmoid and double-spiral, reflect two >>> centers connecting, yet, un-linearly. >>> >>> >>> So, everyone knows Zeno's thought experiments. Then, those usually >>> start with it's given that there's a beginning, then velocity, then >>> an end, the arrow simply starts with an unstoppable force resulting >>> a finite velocity, and ends with an immovable object resulting a >>> zero velocity. Yet, that start must start and its start must >>> start, and its end must end and its end must end, "ad infinitum", >>> to infinity. >>> >>> Then, these are the "infinitely-many higher orders of >>> acceleration", as they get higher they get smaller yet it results >>> infinitely many, infinitesimally small, all the time. >>> >>> >>> Then, any one these things is an exchange, from any common center >>> or contact, so it's always somehow rotational with respect to the >>> rotating frame that it's in, even when it's simply stored and >>> linearly symmetrical like reaction mass from a rocket, it's always >>> also in the centrally symmetrical. >>> >>> >>> >>> Then, something like "vortices" you can find in DesCartes and >>> Kelvin, while, something like "spirals" is pre-historic and >>> associated with both Anantha and Thoth, as "the symbol" of >>> mathematics, then that attenuation and dissipation, and oscillation >>> and restitution, result any double-sigmoid, "swirl". >>> >>> >>> Also relevant is turbulence and the turbid and "wash", what all >>> non-linear in kinematics, is barely modeled in a partial account in >>> the linear in kinetics. >>> >>> >>> >>> Maybe something like Kinnear's "The Great Wheel: Zero the >>> Un-Naming" you'd enjoy. >>> >>> ============================== >> >> In drawing a circle, there is acceleration at every point along its >> circumference. >> >>> >>> >>> > > > There are at least two ways to look at circular motion. > > One has the centrifugal, then it's called centripetal, > where the fugal is kind of like the center or gyrofuge, > while, the petal is about the feet, what kicks it takes > to start the merry-go-round. > > > Then another is that "worlds turn", that a sufficiently > large spinning system is its own reference frame, for > example the Earth to the Sun to the North Star and out > to the galaxy, when it's far enough away from other > systems that it's essentially a dot, it doesn't matter > how much it spins, it is its, "own little world", worlds turn. > > > When, when spinning enough, then this results also what > looks like what's called, "Magnus effect", which is the > effect of "heft", that's a bit simpler yet about the, > "rotational space contraction", why things that are > spinning have more heft, and can fly as they're lofted > or hefted, _not_ like Galileo's perfect parabolas, > and about the "vis viva" and "vis insita", the "live force" > and "inner force", as different than "vis motrix", "motive force", > that any sort thing has these things. > > > So, it's known that Magnus effect has partially an aerodynamic > explanation, then also it has empirical extra in it, > that go along with these ideas of "heft" in spin, > as a separate thing than "weight" in gravity, as > after "mass" the restful inertial content. > > > The "vis viva" and "vis insita" are sort of obsolete terms > since before Galileo, since they were also used to include > things like friction, yet since there are still empirical > extra (unexplained by the usual theory) amounts measurable, > not-Galilean, then they're same sort of terms. Then the > "heft" is a natural word then as a quantity given to these > extra terms. > > > > Aristotle one time was like "there is no un-moved mover", > yet, he also said "circular motion is eternal". > > > Then in usual theories these are called "gyroscopic" terms, > whatever's used to add up what are called "fictional" forces, > like the centrifugal, that though given whether they're in > effect, of course being the real forces, that it's all about > a theory of sum-potentials, and the usual since Galilean and > Newtonian and Einsteinian account, is sort of unawares - > these are natural super-classical notions that the real theory has. > > > > https://einstein.stanford.edu/STEP/information/data/gravityhist2.html "Einstein extended the Equivalence Principle and made it a postulate for his theory of General Relativity. The Strong or Einstein Equivalence Principle states that all of the laws of physics (not just the laws of gravity) are the same in all small regions of space, regardless of their relative motion or acceleration. Since the weaker universality of free fall is a logical consequence of this, the entire theory of General Relativity rests on the single experimental fact that all objects fall with the same acceleration." "General relativity is a magnificent theory, deep, potent, and aesthetically appealing, but Einstein was not satisfied. Gravity remained separate from electricity, and the connection of mass to geometry was incomplete. For thirty years, Einstein tried to formulate a theory that would solve these problems and unify physics. He failed." ========== REMAINDER OF ARTICLE TRUNCATED ==========