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#1
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Got a physics question
If you're in some jet car going 1200fps forwards and you shoot a 1200fps bullet backwards, would the bullet just drop straight down from an observer's view? Let's say there's no other force acting on the bullet besides gravity after it gets fired.
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Brian Last edited by Ricochet; 01-10-2006 at 06:21 PM. |
#2
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Would you be shooting at a relative?
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#3
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I tried that once when I found my X-Wifes boyfriend. It didn't hit him, (maybe it dropped straight down) but it sure scared the S*** out of him.
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. Earl .... ... .... ><SVX(*> Subaru Ambassador [COLOR=”silver”]1992 Tri Color L[/COLOR] ~45K (06/91) #2430 1992 Dark Teal LS-L ~184K (05/91) #0739 1992 Claret LS-L ~196K (05/91) #0831 1992 Pearl LS-L ~103K (06/91) #1680 1992 Pearl LS-L ~151K (06/91) #2229 1992 Dark Teal LS ~150K (07/91) #3098 (parts car) 1992 White LS-L ~139K (08/92) #6913 1993 25th AE ~98K (02/93) #164 1993 25th AE ~58K (02/93) #176 1993 25th AE ~107K (02/93) #215 1993 25th AE ~162K (02/93) #223 1994 Laguna Blue Pearl LSi ~124K (1/94) #2408 1994 Laguna Blue Pearl LSi ~144K (10/93) #1484 1994 Laguna Blue Pearl LSi ~68K (10/93) #1525 1994 Barcelona Red LSi ~46K (02/94) #2624 1994 Pearl LSi ~41K (12/93) #1961 1995 Bordeaux Pearl LSi ~70K (02/95) #855 1996 Polo Green LSi ~95K (03/96) #872 1997 Bordeaux Pearl LSi ~55K (08/96) #097 2003 Brilliant Red LS1 Convertible ~29K (04/03) #8951 1999 Magnetic Red LS1 Coupe ~33K (04/99) #6420 My Email | Old Locker | New Locker | Picture of 15 of the 19 |
#4
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Why were you looking for your Xwife's boyfriend at 1200fps? I estimate that at between 800 and 900 miles an hour. If, somebody shoots at me, mine drops straight down too.
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#5
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I believe the bullet would travel at a reduced speed but not fall straight down as you are also moving foward. Get in the back of someones truck go 30-40mph and pitch a baseball, same effect ball will travel away from the vehicle until it hits the ground.
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1992 SVX LSL Ex wifey has it now pending self destruction 2001 Legacy mods to come 1992 Subaru Legacy 2.2 214k Boob wheels CANT KILL IT |
#6
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As reasonable as it may sound that the bullet will exit the gun and "come to a dead stop", this is impossible with no other forces acting on it. If you happen to aim accurately at someone behind you while you travel at this speed. They will be shot....and shocked..... that you are that steady at that speed. Our Earth is turning at an incredible speed, and basically turning in the direction of west toward east. Does the bullet go slower when we aim toward the east? But that brings up another question. If the earth spins basically from west toward the east, why do storm systems and clouds basically travel from west toward east? Looks like the earth would spin and the clouds would be stationary above the earth, and appear to travel from east toward west. I need beer.
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Robert Is Bush in jail yet? (Looks frantically at watch, then back up) How about now? Now? Come onnnnnn...... Someone freeze me until January, this wait is killing me. Update: 09 January, and still not in jail! Wassup?? 1992 Teal LS-L - 160k (Now new and improved with perfect paint!) |
#7
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are you taking in account the low and high pressure areas behind the car that would be created at that kind of speed?
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98 Impreza Wago-O-Doom & Datsun Roadsters |
#8
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Robert Is Bush in jail yet? (Looks frantically at watch, then back up) How about now? Now? Come onnnnnn...... Someone freeze me until January, this wait is killing me. Update: 09 January, and still not in jail! Wassup?? 1992 Teal LS-L - 160k (Now new and improved with perfect paint!) |
#9
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Kinda like a fly in your car going 65mph, why doesnt the fly smack the back window?
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1992 SVX LSL Ex wifey has it now pending self destruction 2001 Legacy mods to come 1992 Subaru Legacy 2.2 214k Boob wheels CANT KILL IT |
#10
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Robert Is Bush in jail yet? (Looks frantically at watch, then back up) How about now? Now? Come onnnnnn...... Someone freeze me until January, this wait is killing me. Update: 09 January, and still not in jail! Wassup?? 1992 Teal LS-L - 160k (Now new and improved with perfect paint!) |
#11
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2005 RX-8 Grand Touring 2005 Outback 2002 Mercedes-Benz E320 wagon END OF LINE |
#12
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Brian |
#13
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oh, the SRT-4?
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Alan 1987 928 S4 (Black) SOLD! 1997 SVX LSi (Ebony) SOLD! 2005 Legacy GT (Silver) [Cobb Stg 2+] SOLD! 1987 928 S4 (Black) SOLD! 2005 Forester XT Premium (Crystal Gray Metallic) SOLD! 2008 Lancer Evolution X MR (Apex Silver) [Cobb Stg 1+] 2015 Outlander Sport 2.4GT AWD (Mercury Gray) 2013 G37xS (Obsidian Black) |
#14
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You may have heard of Newton's first law: "Every body persists in its state of rest or of uniform motion in a straight line unless it is compelled to change that state by forces impressed on it." We could rephrase this a little and say that a body in motion tends to stay in motion and a body at rest tends to stay at rest unless acted on by an external force. Imagine you are on a perfectly smooth speeding train, moving at a uniform speed (not accelerating or turning), in a car with no windows. You would have no way of knowing how fast you are going (or if you were moving at all). If you throw a ball straight up in the air, it will come straight back down whether the train is sitting still or going 1,000 mph. Since you and the ball are already moving at the same speed as the train, the only forces acting on the ball are your hand and gravity. So the ball behaves exactly as it would if you were standing on the ground and not moving. So what does this mean for our gun? If the gun shoots bullets at 1,000 mph, then the bullet will always move away from the gun at 1,000 mph. If you go to the front of a train that is moving at 1,000 mph and shoot the gun forward, the bullet will move away from you and the train at 1,000 mph, just as it would if the train were stopped. But, relative to the ground, the bullet will travel at 2,000 mph, the speed of the bullet plus the speed of the train. So if the bullet hits something on the ground, it will hit it going 2,000 mph. If you shoot the bullet off the back of the train, the bullet will still be moving away from you and the gun at 1,000 mph, but now the speed of the train will subtract from the speed of the bullet. Relative to the ground, the bullet will not be moving at all, and it will drop straight to the ground. Next question please
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Andy ------------------------------------------------------------------------------------ If I would be a young man again and had to decide how to make my living, I would not try to become a scientist or scholar or teacher. I would rather choose to be a plumber or a peddler in the hope to find that modest degree of independence still available under present circumstances. -- Albert Einstein, The Reporter, November 18 1954 |
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