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Why does a bullet have less momentum fired from a short barrel vs long barrel?
Wiki User
∙ 12y ago
At the instant the gun fires, the bullet is at rest- speed zero. As the expanding gasses from the burning gunpowder reach the bullet, they begin pushing the bullet up the barrel. It's speed is increasing- and the longer the push, the higher the speed. There IS a point of diminishing returns- where a barrel LONGER than the perfect length begins to slow the bullet- you have used all the expanding gasses, and now friction is slowing the bullet. If you had a barrel 20 ft long, the bullet would not make it all the way up the barrel, it would stop.
For barrels on any realistically-usable weapon, a longer barrel will provide more momentum to the bullet than a shorter one. In addition, longer rifled barrels will also impart more spin, which will increase accuracy.
Wiki User
∙ 12y ago
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Does a bullet shot from a gun undergo any acceleration after it leaves the barrel?
No- or minimal at best. Acceleration of the bullet comes from gas expanding inside the barrel, pushing the bullet. Once it leaves the barrel, (or within a VERY short distance) gas is no longer pushing, and acceleration stops, and bullet begins to slow from air resistance.
When a rifle is fired at a distant target the barrel is not lined up exactly on the target so why is it not lined up exactly on the target?
The instant the bullet leaves the barrel it is subject to gravity. If the barrel is lined up exactly on a distant target, the bullet will fall short. The longer the distance, the more elevation is required. The same applies to a football, baseball, or basketball. When the person you are throwing it to is far away, you throw it higher so that it will reach them. With a bullet the principle is the same. You must also allow for wind
Can adding a longer barrel to a gun improve it any?
Usually, yes. A longer gun barrel allows the bullet to accelerate longer and thus increases its velocity. But it is a complicated problem. A short barrel and a large powder load has about the same velocity as a smaller load and a longer barrel. A longer barrel suffers more wear. Really big naval guns were good for a limited number of shots and each shot was numbered, being bigger for every shot.
Is momentum destroyed when a falling ball strikes the earth?
In short, no. The momentum is not destroyed, but rather imparted onto the earth. However, because the earth is so huge, the momentum given has almost zero change on the earth's speed.
If you are travling at the speed of a bullet and then fire a bullet what happens?
The gun and the bullet are already traveling at a high speed. Firing the gun results in the bullet leaving the gun. Its relative velocity to someone standing still would be twice the speed. But its relative velocity to the gun would simply be the normal speed of the bullet. A similar question is the one if your traveling in a car at the speed of light what would happen when you turn on the headlights? No one is really sure. in short, the bullet would go twice the regular speed in a vacuum. I agree with the first bit and have ed a similar question on here. I find the vacuum bit of the above a bit irrelevant. A bullet fired in a vacuum would emerge at the normal speed (around 2,000+mph for a rifle round) but would carry on forever as there would be no air resistance.
Does a bullet of the same caliber travel faster if fired through a rifle rather than a pistol?
a bullet of the same caliber and same grains of powder fired from a long barrel will have a higher muzzle velocity than if fired from a short barrel.
Does a bullet shot from a gun undergo any acceleration after it leaves the barrel?
No- or minimal at best. Acceleration of the bullet comes from gas expanding inside the barrel, pushing the bullet. Once it leaves the barrel, (or within a VERY short distance) gas is no longer pushing, and acceleration stops, and bullet begins to slow from air resistance.
When a rifle is fired at a distant target the barrel is not lined up exactly on the target so why is it not lined up exactly on the target?
The instant the bullet leaves the barrel it is subject to gravity. If the barrel is lined up exactly on a distant target, the bullet will fall short. The longer the distance, the more elevation is required. The same applies to a football, baseball, or basketball. When the person you are throwing it to is far away, you throw it higher so that it will reach them. With a bullet the principle is the same. You must also allow for wind
What is a squib fire of a shotgun?
When the short & wad do not exit the barrel when fired, you have a squib fire, on any gun.
How does rifle barrel length affect bullet performance?
Doesnt. Twist and bullet weight will decide much of the accuracy. Long barrel for magnums because of the amount of powder being burned is important. Otherwise short barrel in any rifle will just increase muzzle flash and report.
Is there a way to find exactly which gun fired the bullet if there are several guns and several bullets?
Yes, there is. Each gun leaves different marks on the bullet as it travels down the barrel. It is just a question of test firing each of the guns available into water. Water stops the bullet in a very short distance without deforming the bullet. Then the sample bullet from the water is placed on one side of a comparison microscope and one of the bullets in question is placed on the other side of the microscope. By careful manipulation of the bullets it's possible to look at both of them to see if they match. If they do, question answered. If they don't, check the sample from the water against one of the other unknown bullets. This process is repeated using test bullets from each of the guns and comparing them against all the unknown bullets. Eventually it is possible to tell which weapon fired which bullet(if all the guns that were fired are available for test firing). The process will also tell whether all the weapons fired are accounted for. If there are bullets that don't match any of the test fired bullets then one, or more, gun/s must be missing
What is the maximum range of?
the range of a 9x19mm would be 2500 yards but with such a short barrel, slow bullet speed and others, the chances of accurate hits is 0%
When was Nothing Short of a Bullet created?
Nothing Short of a Bullet was created in 2001.
What is the maximum range of the 9mm?
the range of a 9x19mm would be 2500 yards but with such a short barrel, slow bullet speed and others, the chances of accurate hits is 0%
How loud is a 22 air rifle?
It all depends on the rifle the size of the barrel and the load in the bullet. .22 Bullets come in stubby, short, long and Mag.
What is the value of 1970's Winchester bullet board display containing long barrel short barrel and hand gun cartridges with the Winchester logo on the top?
I don't know but I have one too so if anyone knows please post a value!!
Can 9mm bullet be use in 380?
The .380 ACP is also known as the 9x17mm, 9mm Short, and 9mm Kurz. It is the ONLY ammunition which can be fired through a .380 pistol. The 9x18mm Makarov (whose bullet diameter is actually 9.3mm) and the 9x19 Parabellum/Luger cartridges ARE NOT compatible.
