|
Joined: Jun 2007
Posts: 24,590 Likes: 6
Campfire Ranger
|
Campfire Ranger
Joined: Jun 2007
Posts: 24,590 Likes: 6 |
Draw a quasi-parabolic arc for the bullet path relative to the bore. Then, to represent the line of sight, draw a straight line that crosses the bullet path at two points. The first intersection is the near zero and the second intersection is the far zero. That only works when the muzzle is pointed up. Of course it has to be pointed up to get the trajectory to have a bullet travel any distance, but a bullet doesn’t rise if the barrel was level with the ground.
|
|
|
|
Joined: Feb 2010
Posts: 15,719 Likes: 1
Campfire Ranger
|
Campfire Ranger
Joined: Feb 2010
Posts: 15,719 Likes: 1 |
Yep, pointed up, above the sight line
Last edited by navlav8r; 05/01/22.
NRA Life,Endowment,Patron or Benefactor since '72.
|
|
|
|
Joined: Jan 2008
Posts: 2,141
Campfire Regular
|
Campfire Regular
Joined: Jan 2008
Posts: 2,141 |
Bullets don't rise above the line of bore. But if the muzzle is pointing up.....
|
|
|
|
Joined: Apr 2004
Posts: 1,425
Campfire Regular
|
Campfire Regular
Joined: Apr 2004
Posts: 1,425 |
Any time someone says bullets do/don't rise they should also specify with respect to what. That's really the jist of it. As you know, the bullet drops from line of bore, rises and drops relative to the line of sight, the target and the earth. Hell, the bullet, rifle and shooter are all moving more or less 24,000 mph if you happened to be viewing it from the moon, and it hasn't even been shot yet. Don't even get me started relative to the sun. Haven't personally met a shooter yet who could explain why gravity exists, but they still hit things a long ways away with the deficiency. (I'm guessing you're a mass warping space time guy?) If a shooter believed that wind was caused by trees sneezing but held/dialled into the sneeze he'd still be better off than the guy who didn't crank/hold into the sneeze.
Life begins at 40. Recoil begins at "Over 40" Coincidence? I don't think so.
|
|
|
|
Joined: Jun 2004
Posts: 44,863 Likes: 4
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,863 Likes: 4 |
Haven't personally met a shooter yet who could explain why gravity exists Does it?
|
|
|
|
Joined: Feb 2010
Posts: 15,719 Likes: 1
Campfire Ranger
|
Campfire Ranger
Joined: Feb 2010
Posts: 15,719 Likes: 1 |
Sure, because everybody knows that apples don’t fall up 😳
NRA Life,Endowment,Patron or Benefactor since '72.
|
|
|
|
Joined: Jul 2005
Posts: 6,792
Campfire Tracker
|
Campfire Tracker
Joined: Jul 2005
Posts: 6,792 |
Somebody once said there is no gravity, the Earth sucks.
Old Corps
Semper Fi
FJB
|
|
|
|
Joined: Apr 2004
Posts: 1,425
Campfire Regular
|
Campfire Regular
Joined: Apr 2004
Posts: 1,425 |
knew some old timers that knew for a fact that their their rifles hit high in the night-time. They weren't wrong, but had long since wondering wondering why. Took me a good few minutes to crack that nut.
Life begins at 40. Recoil begins at "Over 40" Coincidence? I don't think so.
|
|
|
|
Joined: Jun 2004
Posts: 44,863 Likes: 4
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,863 Likes: 4 |
Sure, because everybody knows that apples don’t fall up 😳 Gravity, a la Newton, isn't necessarily why.
|
|
|
|
Joined: Jun 2007
Posts: 24,590 Likes: 6
Campfire Ranger
|
Campfire Ranger
Joined: Jun 2007
Posts: 24,590 Likes: 6 |
Haven't personally met a shooter yet who could explain why gravity exists Does it? Of course gravity exists, but it isn’t the act of falling that is gravity. It is the physics of the phenomenon of larger objects that attract smaller objects due to the difference of mass.
|
|
|
|
Joined: Jun 2004
Posts: 44,863 Likes: 4
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,863 Likes: 4 |
Haven't personally met a shooter yet who could explain why gravity exists Does it? Of course gravity exists, but it isn’t the act of falling that is gravity. It is the physics of the phenomenon of larger objects that attract smaller objects due to the difference of mass.Nope.
Last edited by mathman; 05/01/22.
|
|
|
|
Joined: Jun 2007
Posts: 24,590 Likes: 6
Campfire Ranger
|
Campfire Ranger
Joined: Jun 2007
Posts: 24,590 Likes: 6 |
Haven't personally met a shooter yet who could explain why gravity exists Does it? Of course gravity exists, but it isn’t the act of falling that is gravity. It is the physics of the phenomenon of larger objects that attract smaller objects due to the difference of mass.Nope. Sorry mathman, I nope your nope…
|
|
|
|
Joined: Jun 2004
Posts: 44,863 Likes: 4
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,863 Likes: 4 |
In Newtonian gravity it isn't larger objects attracting smaller objects. It is mutual attraction, and it isn't due to the difference of mass. It's the product of the masses divided by the square of the distance between them, all multiplied by a scaling constant.
|
|
|
|
Joined: Jun 2007
Posts: 24,590 Likes: 6
Campfire Ranger
|
Campfire Ranger
Joined: Jun 2007
Posts: 24,590 Likes: 6 |
In Newtonian gravity it isn't larger objects attracting smaller objects. It is mutual attraction, and it isn't due to the difference of mass. It's the product of the masses divided by the square of the distance between them, all multiplied by a scaling constant. The formula for which a body of mass attracts the other is not the definition of gravity. Stick with math, but remember we’re not talking math, we’re talking mass…
|
|
|
|
Joined: Jun 2004
Posts: 44,863 Likes: 4
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,863 Likes: 4 |
You mentioned attraction, which is a force. It is mutual, and in the Newtonian model the attraction which you mentioned is described by the formula I mentioned.
So how do you define gravity? That is, what is your "physics of the phenomenon" you mentioned?
I should say when I asked "Does it?" above I was referring to the force of gravity.
Last edited by mathman; 05/01/22.
|
|
|
|
Joined: Jun 2007
Posts: 24,590 Likes: 6
Campfire Ranger
|
Campfire Ranger
Joined: Jun 2007
Posts: 24,590 Likes: 6 |
You mentioned attraction, which is a force. It is mutual, and in the Newtonian model the attraction which you mentioned is described by the formula I mentioned.
So how do you define gravity? OK smarty pants, if you had a scale on the moon, would you weigh what you do on earth? Of course not, your formula wouldn’t work on the moon because the mass of the moon is less than that of the earth and the attraction of your mass to the core of the moon is less, giving you a lighter weight, yet you are the same…
|
|
|
|
Joined: Jun 2004
Posts: 44,863 Likes: 4
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,863 Likes: 4 |
If we're sticking with Newtonian gravity then the inverse square law would actually say exactly why I'd weigh less on the moon. The mutual attraction between me and the moon would be less because the product of our masses would be less.
|
|
|
|
Joined: Jun 2007
Posts: 24,590 Likes: 6
Campfire Ranger
|
Campfire Ranger
Joined: Jun 2007
Posts: 24,590 Likes: 6 |
If we're sticking with Newtonian gravity then the inverse square law would actually say exactly why I'd weigh less on the moon. The mutual attraction between me and the moon would be less because the product of our masses would be less. Glip doib googly skizm pakrid smiyrt…
|
|
|
|
Joined: May 2017
Posts: 4,920
Campfire Tracker
|
Campfire Tracker
Joined: May 2017
Posts: 4,920 |
The best war story I have heard, was in a bar in TX. The guy was telling us that he was SF in VN and they would go on top secret missions without dog tags, name tags on their uniforms, military IDs and weapons without serial numbers...... Maybe you never heard of MACV SOG? Or maybe he had? LOL
Life Member NRA, RMEF, American Legion, MAGA. Not necessarily in that order.
|
|
|
|
Joined: Jan 2010
Posts: 13,183 Likes: 1
Campfire Outfitter
|
Campfire Outfitter
Joined: Jan 2010
Posts: 13,183 Likes: 1 |
Obey lawful commands. Video interactions. Hold bad cops accountable. Problem solved.
~Molɔ̀ːn Labé Skýla~
Member #547 Join date 3/09/2001
|
|
|
|
599 members (1936M71, 160user, 1234, 06hunter59, 007FJ, 1lessdog, 58 invisible),
2,409
guests, and
1,186
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums81
Topics1,192,532
Posts18,491,207
Members73,972
|
Most Online11,491 Jul 7th, 2023
|
|
|
|