Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Jim Pennino Newsgroups: sci.physics Subject: Re: Acceleration. Date: Sun, 20 Apr 2025 07:43:40 -0700 Organization: A noiseless patient Spider Lines: 50 Message-ID: References: <79146a2e1362eb4b4f964a2d35445cc5@www.novabbs.org> <1837a5f8732197b6$1579645$1481196$c2565adb@news.newsdemon.com> <1837c53eebdb1a20$304718$1498207$c2065a8b@news.newsdemon.com> <1837ee70ad600bdf$1670295$1481196$c2565adb@news.newsdemon.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Sun, 20 Apr 2025 16:46:05 +0200 (CEST) Injection-Info: dont-email.me; posting-host="8f03ec40681f14fd2f6fc75065b228ff"; logging-data="33005"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/vz/Dl1zkfI724zPfUhkLP" User-Agent: tin/2.6.2-20220130 ("Convalmore") (Linux/5.15.0-138-lowlatency (x86_64)) Cancel-Lock: sha1:VbxqsBI+AkATvovNkINfqWiQ1H4= Bytes: 2884 Maciej Woźniak wrote: > On 4/19/2025 6:42 PM, Jim Pennino wrote: >> Maciej Woźniak wrote: >>> On 4/19/2025 4:53 PM, Jim Pennino wrote: >>>> Maciej Woźniak wrote: >>>>> On 4/19/2025 1:44 AM, Jim Pennino wrote: >>>>>> In sci.physics Bertitaylor wrote: >>>>>>> Wow you guys are so thoroughly wrongly educated about the > fundamentals >>>>>>> of physics. >>>>>> >>>>>> Acceleration is the first derivative of velocity with respect to time >>>>>> and velocity is the first derivative of position with respect to > time. >>>>> >>>>> >>>>> Haven't you even heard that there is no >>>>> acceleration for free falling objects? >>>> >>>> No, not from anyone sane. >>> >>> Surely not from anyone sane. Einstein's >>> elevator - sounds familiar? >> >> Yes, and unlike you I understand the implications which you quite >> clearly do not. > > Clearly you do not; don't worry, most of > your brothers in Einstein can't comprehend > that inconsistent mumble of your divine > guru as well. > > So, a simple (maybe even simple enough for > you) question. > An observer (Alice) is observing an object O > in the position of x. The velocity of the object > is 0, space is inflating. Does the position > change? > Yes or no. Gibberish. Positions have 3 coordinates. Velocity with respect to what? Define "space is inflating". -- penninojim@yahoo.com