Re: A question for those interested in physics...
From Dennis Bloor <den...@satlink.com.au>
· alt.ascii-art
· 29 Mar 2002 05:53 · View full thread
· report
mer...@cars3.uchicago.edu wrote in message news:<zz2o8.65$s4....@news.uchicago.edu>... > In article <a7q9p0$n6or0$2...@ID-56786.news.dfncis.de>, Edwin <zer...@aiur.org> writes: > >C Lund <chr...@NOSPAMchello.no> wrote in > >news:chr...@news01.chello.no: > > > >> In article <x7Vn8.1094$sO2...@news.xtra.co.nz>, > >> "Robert Bowmaker" <rob...@dse.gen.nz> wrote: > >> > >>> Firing bullets straight up is a common occurence in many situations > >>> (i.e. warning shots, shooting at the sky during a funeral for certain > >>> people etc.) > >>> > >>> The question is: What actually happens to the bullet? Does it go into > >>> space? > >> > >> Unlikely. I don't think the bullet goes fast enough. > >> > >>> Does it fall back down? You are all forgetting that g is not a constant except near the Earth's surface and not even then!! Dennis the Menace > >> > >> Yes. > >> > >>> Does it burn up? > >> > >> Unfortunatly, no. > >> > >> Not only does the bullet fall back down, but when it hits the ground, > >> it's travelling at roughly the same speed as when it left the gun > >> (minus a little for air resistance). I'm pretty sure people have been > >> killed this way. > > > >No, the force of gravity acting on a few ounces of lead can't accelerate it > >to the same velocity it had by being fired out of the gun. If it could, > >you'd never be able to fire the bullet straight up. The forces would be > >equal. > > > Nope, that's wrong reasoning. The force of gravity is weaker but it > acts over far larger distance than the force propelling the bullet out > of the barrel. In the absence of air resistance, the bullet would > hit the ground at the same velocity at which it was fired up. Air > resistance changes this significantly, of course. > > Mati Meron | "When you argue with a fool, > mer...@cars.uchicago.edu | chances are he is doing just the same"
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f996b,53f9f7cceb4d817f X-Google-Attributes: gidf996b,public X-Google-ArrivalTime: 2002-03-28 21:53:02 PST Path: archiver1.google.com!postnews1.google.com!not-for-mail From: den...@satlink.com.au (Dennis Bloor) Newsgroups: alt.ascii-art Subject: Re: A question for those interested in physics... Date: 28 Mar 2002 21:53:02 -0800 Organization: http://groups.google.com/ Lines: 48 Message-ID: <ace...@posting.google.com> References: <x7Vn8.1094$sO2...@news.xtra.co.nz> <chr...@news01.chello.no> <a7q9p0$n6or0$2...@ID-56786.news.dfncis.de> <zz2o8.65$s4....@news.uchicago.edu> NNTP-Posting-Host: 203.19.222.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: posting.google.com 1017381182 2233 127.0.0.1 (29 Mar 2002 05:53:02 GMT) X-Complaints-To: gro...@google.com NNTP-Posting-Date: 29 Mar 2002 05:53:02 GMT Xref: archiver1.google.com alt.ascii-art:16373
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