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Groups > sci.physics > #529378
| From | jimp@specsol.spam.sux.com |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re: raining bullets |
| Date | 2015-10-31 03:38 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <ampdgc-ou7.ln1@mail.specsol.com> (permalink) |
| References | <8ad5a1b5-6e1c-4815-b383-266936df13bb@googlegroups.com> <29fdgc-ht6.ln1@mail.specsol.com> <kOOdnWTYtOM4iKnLnZ2dnUU7-a2dnZ2d@giganews.com> <j2ldgc-ge7.ln1@mail.specsol.com> <kOOdnZrbtONatKnLnZ2dnUU7-a2dnZ2d@giganews.com> |
Sam Wormley <swormley1@gmail.com> wrote: > On 10/30/15 9:19 PM, jimp@specsol.spam.sux.com wrote: >> Sam Wormley <swormley1@gmail.com> wrote: >>> On 10/30/15 7:40 PM, jimp@specsol.spam.sux.com wrote: >>>> RichD <r_delaney2001@yahoo.com> wrote: >>>>> In Physics 101, they teach that a bullet falls at the same rate >>>>> it rises, it's gravity etc. Hence laws against firing into the sky. >>>>> >>>>> But in the real world, there's air resistance, in both directions. >>>>> Question: at what speed does a bullet actually hit the earth? >>>>> Assume .38 Special, if it matters. >>>>> >>>>> -- >>>>> Rich >>>> >>>> There are several things that matter. >>>> >>>> It takes little thought to realize that bullets do not come down >>>> at the same speed they went up. >>>> >>>> The muzzle velocity of most handguns is just under 1.000 ft/sec and most >>>> rifles around 2,300 ft/sec. Supersonic is 1,100 ft/sec. >>>> >>>> Once a bullet reaches apogee, it's vertical velocity is zero and the >>>> only thing accerlating it is gravity, which means bullets, like everything >>>> else, have a terminal velocity on the way down that is a function of >>>> the drag and mass. >>>> >>>> Bullets are spin stabilized so as to not tumble in flight. >>>> >>>> If fired straight up, they are guaranteed to tumble on the way down. >>>> >>>> At some angle less than straight up, they will not tumble and will >>>> retain a lot velocity. >>>> >>>> If they tumble, they have much greater drag. >>>> >>>> Experiments have shown that the typical range of terminal velocities for >>>> bullets is around 300 to 700 ft/sec. >>>> >>>> After WWI, the US Army got concerned about the troops shooting into >>>> the air at those new fangled airplanes and worried that the troops >>>> might wind up shooting themselves in the process. >>>> >>>> So in the 1920's a young junior officer named Hatcher, later General >>>> Hatcher, was sent to a remote beach with troops, guns, and equipment. >>>> >>>> They built a steel canopy for cover and built mounts to fire a variety >>>> of guns, including rifles and machine guns straight up into the air. >>>> >>>> After a little testing the exercise became a game to see if the troops >>>> could catch the bullets in their helmets. >>>> >>>> If you can find the whole story it is an interesting read. >>>> >>>> I would not suggest anyone, well maybe one person, trying this at >>>> home as a bullet at even 300 ft/sec would be a hell of a thump on >>>> the head. >>>> >>>> >>>> >>> >>> >>> Gentlemanly response from the jimp. Good. >> >> Have you ever wondered why you are the only person who thinks I am >> angry with them, spamming piece of shit? >> > > Oops, you blew it, jimp! Nope, I called a spamming shit head a spamming shit head; right on the money with that one. -- Jim Pennino
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raining bullets RichD <r_delaney2001@yahoo.com> - 2015-10-30 16:50 -0700
Re: raining bullets R Kym Horsell <kym@kymhorsell.com> - 2015-10-31 00:10 +0000
Re: raining bullets Fabian Russell <root@localhost.localdomain> - 2015-10-31 00:38 +0000
Re: raining bullets jimp@specsol.spam.sux.com - 2015-10-31 00:40 +0000
Re: raining bullets Sam Wormley <swormley1@gmail.com> - 2015-10-30 20:13 -0500
Re: raining bullets benj <nobody@gmail.com> - 2015-10-30 21:39 -0400
Re: raining bullets jimp@specsol.spam.sux.com - 2015-10-31 02:19 +0000
Re: raining bullets Sam Wormley <swormley1@gmail.com> - 2015-10-30 21:39 -0500
Re: raining bullets jimp@specsol.spam.sux.com - 2015-10-31 03:38 +0000
Re: raining bullets "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-10-31 13:02 -0700
Re: raining bullets Double-A <double-a3@hush.com> - 2015-11-01 13:46 -0800
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