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When a rifle with a longer barrel is fired the force of expanding gases acts on the bullet for a longer distance what effect does this have on the velocity?
Wiki User
∙ 14y ago
To a point, the velocity of the bullet will increase. However, at some point, the gasses driving the bullet have maxed out, and beyond that point, the bullet will begin to slow from friction with the barrel. For a .22 LR cartridge, that length is about 12 inches. Larger cartridges have a greater "Max velocity" length, but there is a point of no more gain, and the start of loss of velocity.
Wiki User
∙ 14y 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.
Define trAjectory of the bullet velocity of the bullet velocity?
Bullet trajectory is the path the bullet travels once it leaves the barrel. Bullets travel on a long arch and cross the line of sight twice. Once shortly after leaving the barrel and once again on target assuming the sights are properly zeroed. This is the trajectory of the bullet. Bullet velocity is the speed at which the bullet is traveling along it's trajectory.
Does the velocity of a 22 caliber bullet change with the length of the barrel?
Yes. The velocity of all common cartridges changes with the length of the barrel. In the case of a .22 LR, they develop the maximum velocity between 12 and 16 inches of barrel. Shorter than that, the gasses from the gunpowder have not accelerated the bullet as much as they can. Longer than that, gasses reached their max acceleration, and the bullet is now slowing from friction in the barrel.
How fast does a bullet accelerate when it leaves a gun barrel?
A bullet does not accelerate after it leaves the barrel of a gun. It will decelerate. You could say it accelerates, but the acceleration would be negative. The bullet is accelerated by expanding gas as it moves down the barrel, and after it leaves the muzzle, there is no more acceleration imparted from expanding gas. We also find that air friction (drag) is acting to slow it down. Think this one through and it becomes obvious.
Why does a bullet have less momentum fired from a short barrel vs long barrel?
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.
What happens in a gun barrel?
Barrel contains the force of expanding gasses, as it pushes bullet out of the 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.
Define trAjectory of the bullet velocity of the bullet velocity?
Bullet trajectory is the path the bullet travels once it leaves the barrel. Bullets travel on a long arch and cross the line of sight twice. Once shortly after leaving the barrel and once again on target assuming the sights are properly zeroed. This is the trajectory of the bullet. Bullet velocity is the speed at which the bullet is traveling along it's trajectory.
Does the velocity of a 22 caliber bullet change with the length of the barrel?
Yes. The velocity of all common cartridges changes with the length of the barrel. In the case of a .22 LR, they develop the maximum velocity between 12 and 16 inches of barrel. Shorter than that, the gasses from the gunpowder have not accelerated the bullet as much as they can. Longer than that, gasses reached their max acceleration, and the bullet is now slowing from friction in the barrel.
How fast is a pistol bullet?
Too broad a question. Muzzle velocity is determined by the specific cartridge, barrel length, barrel tolerances, etc.
Why does a gun pop?
The bullet is quickly pushed out of the barrel by rapidly expanding gasses from the burning gunpowder. Those expanding gasses push the air when the bullet leaves the gun, making a POP or POW or BANG.
How fast can a mp40 bullet go?
An MP40's muzzle velocity (speed of a bullet upon exiting the barrel) is about 1,250 feet/second.
What makes the bullet fly out of the gun?
When a gun is fired, gunpowder in the cartridge is ignited. It burns very quickly, creating a cloud of rapidly expanding high pressure gasses. Those expanding gasses push the bullet out of the barrel.
Does a higher muzzle velocity equal a longer range?
All other factors equal (bullet mass & frontal area, angle of barrel, etc) a higher muzzle velocity will make the bullet travel further horizontally as if falls to the ground. If the barrel is level when fired , the bullet will hit the ground at the same time as a bullet dropped simutaneously from muzzle height
Why does a bullet have less momentum fired from a short barrel vs long barrel?
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.
How fast does a bullet accelerate when it leaves a gun barrel?
A bullet does not accelerate after it leaves the barrel of a gun. It will decelerate. You could say it accelerates, but the acceleration would be negative. The bullet is accelerated by expanding gas as it moves down the barrel, and after it leaves the muzzle, there is no more acceleration imparted from expanding gas. We also find that air friction (drag) is acting to slow it down. Think this one through and it becomes obvious.
Is a bullet leaving a muzzle at it's full speed?
No the full speed of the bullet would be when it is fired, once the bullet travels along the barrel and exits the muzzle it is already slowing
