Free fall
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From: Randy Poe on 15 Sep 2005 12:06 Don1 wrote: > Randy Poe wrote: > > Don1 wrote: > Snip< > > > Using these simple formulas it is possible to find the velocity and > > > distance a body free falls during any period of time. > > > > Yes, if correctly applied. This is the most correct post I've seen > > from you but there is still a slight misinterpretation of the > > meaning of the formulas. > > > > These formulas are just adaptations of those found in most basic > physics texts: "Adapted" in that they were changed from correct to incorrect (I missed your error in forgetting to put a "t" after "vi"). However, if you fix that error, then much of what you said is not far from correct, although you are misinterpreting the meaning of d. It is not the distance traveled in the t-th second. It is the distance traveled since t=0, and t need not be an integer. Correctly interpreted, t can be any real number. > With further adaptions they will apply to all kinds of > motion. The unadapted equations already do that. Specifically: F = ma a = rate of change of velocity v = rate of change of displacement. Those three have served many a simulator or game designer to give good, realistic motion. - Randy
From: tadchem on 15 Sep 2005 16:55 "odin" <ragnarok(a)yahoo.com> wrote in message news:k8-dnaAukKFNFLTeRVn-gQ(a)whidbeytel.com... > > Eric Gisse wrote: > >> Please, please, please stop validating his existance. The zero sum > >> game of trying to teach Don anything needs to stop. > > > > Zero-sum? And here was I thinking it was negative-sum. > > That is more like it. A negative sum game. There are no winners. Kind of > like abusing drugs...... Just say 'No' to sHead. Tom Davidson Richmond, VA
From: jowr.pi on 15 Sep 2005 21:23 briggs(a)encompasserve.org wrote: > In article <1126766370.621443.199350(a)o13g2000cwo.googlegroups.com>, "Eric Gisse" <jowr.pi(a)gmail.com> writes: > > > > odin wrote: > > > > [snip] > > > > Please, please, please stop validating his existance. The zero sum game > > of trying to teach Don anything needs to stop. > > Please don't use the term "zero sum game" when it does not apply. > > If it were zero sum then your advice would be worthless. > > John Briggs Watch for the next dumb donny post.
From: Don1 on 15 Sep 2005 21:49 Randy Poe wrote: > Don1 wrote: > > > > These formulas are just adaptations of those found in most basic > > physics texts: > > "Adapted" in that they were changed from correct to incorrect > (I missed your error in forgetting to put a "t" after "vi"). That wasn't an error Randy: There is no t after vi because vi is a _ratio_ of length l, to t. The formula in the textbooks is wrong: It should be s=(v/i)xt + (a/2)t^2: Dividing all terms by t we should get s/t=l/t + (a/2)t > However, if you fix that error, then much of what you > said is not far from correct, although you are misinterpreting > the meaning of d. > Look in your basic physics text: Although they probably use s instead of d; the equation is given as s=(vi)t + at^2; No wonder it only works when vi=0'/sec. > Don > - Randy
From: Herman Trivilino on 15 Sep 2005 23:05
"Don1" <dcshead(a)charter.net> wrote ... > These formulas are just adaptations of those found in most basic > physics texts: With further adaptions they will apply to all kinds of > motion. You, or someone who will make the effort, and has the > fortitude, could be the one to do it. I'm running out of time and > energy now but have made substantial inroads which as time and energy > permit, I'll be continuing to persue. With no intent to diminish your efforts, haven't you really been a student of the work others have done? These substantial inroads are admirable, but what makes you think others haven't gone before you? Are you asking that their work be duplicated, or just studied more thoroughly? Based on my studies, I've learned a lot about how to apply these formulas to "other kinds of motion". And so have a lot of your other correspondents. We've tried to share that knowledge with you, but I have to say, it's been met with considerable resistance on your part. ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |