Even though we cannot observe the forces acting on a projectile the moment it leaves the muzzle, we know those forces significantly affect its actual path.
Pistol shooters should know that these principles exist, but have little to be concerned with. This is the gradual radial reduction from the shoulder to the meplat or tip.
Base drag is caused by the partial vacuum that occurs behind the projectile during its flight. There is a brief moment when a projectile leaves the barrel in which it is somewhat unstable.
Incidentally, if you are not afraid of chemistry then reaction mechanism is a field where a very brilliant and well-read beginner with only intelligence and imagination and a reasonably good lab as his weapons can do some truly original and exciting work that may not turn out to be merely "the transfer of bones from one graveyard to another".
The outside diameter of the bearing surface equals the caliber of the projectile. In this article, I will introduce some basic physics principles, discuss projectile characteristics and focus on transitional ballistics. Now, on to the physics.
Some rifle and pistol projectiles have a cannelure somewhere along the bearing surface. This leads to really interesting optical properties, and presumably affects the conductivity too.
Combine a general text on solid state physics with some cutting edge research papers from the net and perhaps some elementary speculations you can make, and you should be ready to go.
If you recall from our discussion on mechanical precision, barrel rifling will rotate a projectile along its center of mass and the barrel crown exerts the very last influence on the projectile as it exits the bore. This leading edge affects the amount of drag air resistance.
Concurrently, air resistance across the full surface area of the rotating projectile exerts an angular force at 90 degrees in relation to the direction of rotation and the orientation of the longitudinal axis, which is precession. The cannelure is a set of tooling marks or series of indentations designed to better secure the crimp and prevent projectile set-back.
In this process, the nose of the projectile varies in a helical motion until it is dampened to stabilized ballistic flight, which is nutation. Therefore, although the firearm appears level, the projectile exits the bore at a slight upward angle.
Science journalism We invite links to all websites, but article and blog post submissions require proper sourcing from the literature or mainstream scientific journalism. OK, now it is time for the heavy physics stuff.
Discouraged or not allowed. The very moment the projectile is free of the bore, atmospheric resistance exerts pressure simultaneously against the nose and under the ogive of the projectile at the same time.
Careers questions Questions regarding job opportunities and working as a physicist have a dedicated weekly Careers and Education thread and should be posted there. But there is more… Projectile Nomenclature Projectile design significantly affects performance from ignition, travel through the bore, trajectory, and target impact.
Precession is an angular force applied to a rotating object caused by its torque. Pre-prints are accepted, but moderators reserve the right to delete any posts that break the rules regarding unscientific content.
So what does that all mean? Keep in mind, however, that the bore axis of a firearm is tilted slightly upward in relation to the line of sight.assumptions and basic laws of physics, it can be shown that the relationship between rotational frequency of the rotor blade (f) and the mass (m) of the helicopter is: f 2 = mg/(8π 3 ρλ 2 R 4) where ρ is the.
Ballistics The motion of a projectile, from the instant of firing until impact at the target, is divided into three distinct phases: (1) interior ballistics, which treats of the motion of a projectile while it is still in the gun; (2) exterior ballistics, which considers the motion of the projectile from the time it emerges from the gun until it reaches the target; and (3).
The extended essay I am submitting is my own work (apart from gUidance allowed by the International Baccalaureate) I have acknowledged each use of the words, graphics or ideas of another person. whether written, oral or physics behind the process of using rockets to launch the space shuttle.
INTERNATIONAL BACCALAUREATE EXTENDED ESSAY PHYSICS The simple Pulley system and its efficiency Research Question: “How does the length of wire and thickness of wire affect the efficiency of Atwood’s machine?”.
Transitional Ballistics, Yaw, Precession and Nutation: Simply defined, Yaw is a deviation of a forward moving aerodynamic object from its longitudinal axis.
Precession is an angular force applied to a rotating object caused by its torque. Basically the extended essay is a piece of independent research done during the course of IB.
I'm planning to do a physics EE, but now it's mid April and I still failed to find a simple yet specific topic to do reasearch on.Download