User Panel
Posted: 6/6/2008 6:19:57 AM EDT
Meat and potatoes from the threadjack.
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He is trying to understand how a small animal, shot with a rifle, ends up closer to the shooter's position.
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Linear and angular momentum can be interconverted. Your quotes are messed up.
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There is no way it could have run - it looked like it was turned inside out. |
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Nobel prize winning physicist
ETA: Correct Nobel Laureate. |
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Is he also a JFK conspiracy theorist? "back and to the left back and to the left back and to the left back and to the left back and to the left back and to the left..." |
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PLease put that in layman's terms. Thank you. How? I did a straight cut and paste. I did omit some that did not really contribute to the OP. |
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Bernouli effect? Isn't that where a spinning body can generate lift on one side? |
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Any links? Thanks. |
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No. Just an observation of the facts on my part. There is too much speculation on the JFK issue. |
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Interesting, but wouldn't that give a 90 degree deviation (at most) from the original direction? I'm talking 180 degrees +/- a couple degrees. |
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Dr. Courtney is a physicist and a member here. |
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Entry wound: Small.
Exterior: Flesh (elsastic). Internal dynamics: Viscous combination of fluids and gases (lungs). Exit Wound: Large Theory: Bullet enters and dumps massive amounts of entry liquifying and pressurizing guts of critter, most especially full lungs full of air. It immediately exists with a larger wound than the entry. The pressurized innards seek equilibrium by taking the path of least resistance, out the exist hole. Like a "water rocket" the mass of flesh and air and liquid that blows out of the exit wound acts as a source of thrust and flings the critter in the opposite direction. |
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I wait with |
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Simple kids toy physics? |
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Hey, just my theory. Don't post a thread asking for input and then insult people who throw things out. If you've ever seen the "high speed" videos of the high velocity varment shoots, the ones that kick back toward the shooter always have a jet of entrails exiting the back. My working theory is that if the lungs are full when the bullet hits, the compressibility of the air makes a difference. |
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Involuntary muscle movement caused it jump, or dirt kicked up from the bullet impact shoved the little guy back toward the shooter. A jet of high pressure blood and guts might have contributed. |
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Gonz, It wasn't meant to be an insult at all. I was just feeling kinda STOOPID that I may have missed out on some of my childhood. I was originally thinking that maybe the momentum/mass of this critter turning inside out was what caused it to move in the direction it did. There is probably some time/energy science/math type stuff to explain it. I will also need someone with excellent translation skills to help me comprehend it. Thanks for your input - absolutely no offense intended. |
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Oops. Wrong physicist. Luis W. Alvarez was the Nobel laureate who did this. I do not know if this is available online anywhere: American Journal of Physics, Vol. 44, No. 9, September 1976 Pages 813 - 827 "A Physicist Examines the Kennedy Assassination Film" Luis W. Alvarez ETA: Found the PDF online. You have to subscribe to read it: scitation.aip.org/vsearch/servlet/VerityServlet?KEY=AJPIAS&CURRENT=NO&ONLINE=YES&smode=strresults&sort=rel&maxdisp=25&threshold=0&pjournals=AJPIAS&pyears=2001%2C2000%2C1999&possible1=A+Physicist+Examines&possible1zone=article&SMODE=strsearch&OUTLOG=NO&viewabs=AJPIAS&key=DISPLAY&docID=1&page=1&chapter=0 |
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I'm sure any involuntary muscle movement was caused by the 150 gr slug going through it at 3400 fps. The dirt was approx 3-4 ft behind as I recall. The high pressure jet theory may hold some good merit. Had I known at the time the act was going to be this intriguing I would have found a way to set up high speed camera's and the like. Hind sight is 20/20. |
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That is exactly wha tI was thinking, when JFK was shot his head flew BACK!!!! obviously because he was shot it the back of the head. then they tried to prove it on a documentary, bu shooting a human skull (no skin or flesh) and when a chucnk of the skull went flying backwards they said "see that prooves it!" (ignoring the fact that the rest of the skull vaporized and went flying forward....) oh yeah, and anybody who has shot shit witha high power rifle knows the exit hole is bigger... but JFK's exit hole was mysteriously tiny, and the "entry wound" int he back of his head was massive... yeah right... JFK was shot from the front.... I'm guessing with a silenced 45 |
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If there was a dirt backstop, it might have hit that and bounced forward.
Sort of like when shooting cans against a dirt backstop. They'll fly back, hit the dirt, then bounce and roll forward. |
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Isn't it the "jet" of material "shooting" out the exit wound that propels the carcass towards the direction of the shooter?
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There was no evidence that the carcass bounced off of anything behind it. No entrail smears, impressions in the ground, etc.. |
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Right there you illustrate why these questions are impossible to answer quickly, or sometimes not at all - the question was posed without providing all the pertinent information. What we know is that high speed bullets hitting prairie dogs causes them to fly. |
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Sorry. I saw the projectile weight and velocity were ommited in the OP. My mistake, I was trying cut/paste to un-jack another thread at someones request. |
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