It is an arc- properly called a parabola. The faster the bullet, the flatter the arc.
Assuming the bullet is fired from a gun, the bullet will move out of the bore with a high velocity and will immediately begin falling and decelerating. If the bore is rifled, the bullet will also rotate on its long axis (providing stability in flight).
Bullets fired from a rifled firearm should NOT tumble in flight. If they do so, it is a sign of problems. This may be caused by different matters that all relate to the rifling in the firearm, and the bullet. First is rifling is badly worn, if the bore is oversized for the bullet, or if rifling is badly fouled with lead/ jacketing metal/powder deposits, the bullet will not be gripped by the rifling and spun, and may not be stable in flight (tumbling) Try cleaning the bore properly, and check for excessive wear at the muzzle. The second condition is the wrong weight/length of bullet for the rate of twist of the rifling. A fast rate of twist, combined with a very fast bullet, MAY result in the bullet "stripping", and not being spun by the rifling. Or a very heavy, slow bullet may not be spun fast enough to stabilize the bullet. Most .22 rimfire rifles are rifled to shoot 40 grain bullets accurately. If loaded with a 60 grain bullet, such as the Aguilla 60 gr SSS, the bullet will not be stabilized, and may tumble in flight.
Depends on rifle, bullet, case design and powder charge.
Trajectory of a bullet in flight is governed by a combination of the initial speed, the ballistic coefficient of the bullet, the angle at which it is fired, and external factors such as air temperature, humidity, wind speed, and air pressure. Ballistic coefficient is a value assigned based on the bullet shape and its length to diameter. A bullet with a higher ballistic coefficency will retain energy (speed) better than one with a low BC. There are several computer programs that can be used in the speed and BC (the major factors) are known.
Bullets will drop almost the same vertical distance in equal time. The limitation is the vertical drag force on the bullet. If fired in a flat trajectory, a bullet will start with no vertical velocity. As it continues on its path however, the force of gravity will impart some vertical velocity to it. Initially the vertical component of the drag force will be negligible, but the longer it flies, the faster it drops. At some point the drag force becomes noticeable and the roughness of the bullet surface and geometry of the bullet begin to play a role in how much vertical drag force is exhibited. Most of the time a bullet will hit its target before this effect makes much difference, but if you fired two different bullets from the top of a very high mountain and tracked their flight you would probably find them dropping at different speeds towards the end of their flight.
The barrel guides and accelerates the bullet out of the rifle, and imparts spin to the bullet to stabilize the bullet in flight.
Need more information.
A "tracer" bullet.
Yes
Assuming the bullet is fired from a gun, the bullet will move out of the bore with a high velocity and will immediately begin falling and decelerating. If the bore is rifled, the bullet will also rotate on its long axis (providing stability in flight).
If that is its direction of flight, yes.
Trajectory.
line of flight, or you can also call it a parabolic arc.
Known as the muzzle velocity, it is the fastest speed the bullet will have in flight.
Bullets fired from a rifled firearm should NOT tumble in flight. If they do so, it is a sign of problems. This may be caused by different matters that all relate to the rifling in the firearm, and the bullet. First is rifling is badly worn, if the bore is oversized for the bullet, or if rifling is badly fouled with lead/ jacketing metal/powder deposits, the bullet will not be gripped by the rifling and spun, and may not be stable in flight (tumbling) Try cleaning the bore properly, and check for excessive wear at the muzzle. The second condition is the wrong weight/length of bullet for the rate of twist of the rifling. A fast rate of twist, combined with a very fast bullet, MAY result in the bullet "stripping", and not being spun by the rifling. Or a very heavy, slow bullet may not be spun fast enough to stabilize the bullet. Most .22 rimfire rifles are rifled to shoot 40 grain bullets accurately. If loaded with a 60 grain bullet, such as the Aguilla 60 gr SSS, the bullet will not be stabilized, and may tumble in flight.
Depends on rifle, bullet, case design and powder charge.
"Smart Bullet" is the term for a THEORETICAL bullet that would be capable of pursuing a designated target, changing direction in flight, etc. While there have been patents applied for, and stories written about guns with "smart" bullets, they are not produced by anyone.