bullets from two revolvers are fired with the same velocity

In addition, the jacket is thicker at the tip than at the heel, with precutting of the thick portion to that, upon target impact, six sharp copper points are raised in a radial fashion. (c) Write the general equation for conservation of momentum in terms of m1, v1, m2, v2, and final velocity vf. Why? Which statement is true? A bullet fired straight up will slow down, stop, then fall to earth again, accelerating until it reaches a point where its weight equals the resistance of the air. They may demonstrate less deformation when recovered. 2. It only takes a minute to sign up. Range is the most important factor, and can be estimated in over half of cases, as can the shot size used. (a) Sketch the problem with before-and-after diagrams, representing the skaters as blocks. It is easier to design features that aid deceleration of a larger, slower moving bullet in tissues than a small, high velocity bullet. is passing current through a resistor with a current of 2A, what is the value of the resistor? The effect is small. b) Temperature Images of Model 547 cylinders clearly show it shared the cylinder length (1.675 inches) used in S&W K-Frame Magnums with recessed rims. $$F' = m \frac{\textrm{d}v'}{\textrm{d}t} = m \frac{\textrm{d}v}{\textrm{d}t} = F$$. The term ballistics refers to the science of the travel of a projectile in flight. The easiest way to think about it is in planes. (c) Find the position of the particle at time 4. Finally, I computed the angle at which you would need to fire a bullet so it lands at the same time as the one dropped: this turns out to happen at an angle of about 0.05. Both bullets have the same velocity, the question tells you that, but the two velocities for the guns are different. The bullet from gun #1 is twice as heavy as the bullet from gun #2. Gun #1 weighs three times as much as gun #2. If a rifle is "sighted in" for a 100 yard target, it will shoot noticably lower (roughly 4 inches lower for a medium power rifle) on a 200 yard target. Experts are tested by Chegg as specialists in their subject area. Hollowpoint bullet design facilitates turning the bullet "inside out" and flattening the front, referred to as "expansion." He grabs her around the waist, and they maintain their balance. If the 44 magnum is compared with the 357 magnum, the effect of bore diameter is seen. These weapons are easily concealed but hard to aim accurately, especially in crime scenes. With 21 grs. Bullets do not typically follow a straight line to the target. To simplify this question and equalizing the atmospheric conditions, instead of bullets falling to the ground, consider yourself jumping up and falling back to the ground. The first is dropped by someone on the ship. For a bullet we'll say $m=10 g$. 2023 Outdoor Sportsman Group. The charge on bead 1, A: Note: As per the guidelines, we can only answer first question of multiple question. D Question 3 2 pts Bullets from two revolvers are fired with the same velocity. We considered the cylinder throat diameters of the two revolvers. The ratio of the momentum imparted to sun #I to that imparted to sun #2 is. bullets from a .38 caliber revolver break skin at 130 miles-per-hour, 9mm handgun bullets can break skin at just 102 miles-per-hour, and a .30 caliber bullet will break skin at only 85. More powder can also be used in rifle cartridges because the bullet chambers can be designed to withstand greater pressures (50,000 to 70,000 for rifles psi vs. 30,000 to 40,000 psi for handgun chamber). Give a Gift At the Dallas Crime Lab we were constantlytesting new ammunition for law enforcement. The Hague Convention of 1899 (and subsequently the Geneva Convention) forbade the use of expanding, deformable bullets in wartime. After the cue ball strikes the group, the four balls scatter, each traveling in a different direction with different speeds as shown in Figure P10.30. They have no way of knowing whether they're supposed to keep up with the ship or the shore or what - they only know their location and velocity. (Karger and Knewbuehl, 1996) Incapacitation of gunshot victims is primarily a function of the area of the body wounded. For a better experience, please enable JavaScript in your browser before proceeding. Some hesitated, but I could move them easily enough with the dowel. Wadding may be found near the surface of the wound. It obeys the equation z(t) = z(0) - (a/2)(t^2); where z(0) = 6 feet, and 'a' = about 32 ft/(s^2). The greater the elasticity, the less the damage. The 9mm Luger 115-grain JHP ammo was probably loaded to 32,000 psi, and the commercial .45 ACP 230-grain FMJ ammo to about 20,000 psi, yet the velocity differences between pistol and revolver were about the same. We pondered if these results were common to revolvers chambered for other semiauto pistol cartridges. A 5-kg cart moving to the right with a speed of 6 m/s collides with a concrete wall and rebounds with a speed of 2 m/s. A World Record Attempt and everyone is out at the range shooting and practicing. $$ \frac{ C_d \rho A t V_p }{ 2 m} =\frac{ \rho t V_p }{ 2 BC} \ll 1 $$. We were certain that these factors would reduce 9mm Luger velocities enough to demote any effective police hollowpoint loading to the also-ran column. The shot bullet has a z and an x component of velocity. One way to view the math is as a consequence of Newton's laws of motion, which state, $$F = m \frac{\textrm{d}v}{\textrm{d}t}$$, If we transfer reference frames from the shore (frame S) to the ship (frame S'), we're transforming the velocities according to. He considered sailing on a smoothly-sailing ship, and noted that if you're in the hull, you don't notice the ship's motion in any physics experiment. I'm guessing for handgun speeds it won't, but for high powered rifles it seems like it could. fps? Thus, increasing the twist of the rifling from 1 in 7 will impart greater spin than the typical 1 in 12 spiral (one turn in 12 inches of barrel). The bullet from gun #1 is twice as heavy as the bullet from gun #2. (See Section 6.1.). For part A your momentum equations are slightly off. EDIT: I should specify that this only holds true for ideal situations (being in a vacuum, no air resistance, etc.). Mikey Hartman, Lt. Col. The dropped bullet has a z component of velocity and nothing else. Original .38 S&W Special factory loads contained 21.5 grains of black powder and 158-grain bullets. If you shoot your gun Eastward, the bullet is traveling even faster - and it will appear "lighter". Then I'll write the full differential equations for the problem in some fairly extreme vector shorthand notation. Gun #1 weighs three times as much as gun #2. Though they penetrate such armor, they produce no more wounding than ordinary bullets of similar size. Why are you only using one velocity? Finally, a mechanism is set up to drop a bullet at the exact time (t=0), and from the exact same height, as the shooter's bullet leaves the perfectly level gun barrel. The ratio of the momentum imparted to gun #1 to that imparted to gun #2 is equal to 2 : 1, Detailed explanation and calculation is shown in the image below. 6. Lets say the bullet dropping to earth is motion in the 'z' direction. The mass of A is nine times that of B. 3:2 If you shoot your gun Eastward, the bullet is traveling even faster - and it will appear "lighter". The amount of kinetic energy possessed by any individual pellet can vary, based upon multiple variables and interactions among the shot mass. But it worked pretty much the same way as a handgun bullet the size of your pinkie. This seemed insanity. Bullet design is important in wounding potential. $$ \vec{r_b}' = \vec{V_b}$$ The following images illustrate bullet deformation and damage: Bullet velocity and mass will affect the nature of wounding. The diameter of the crush injury in tissue is the diameter of the bullet or fragment, up to the long axis. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. At close range, the pellets essentially act as one mass, and a typical shell would give the mass of pellets a muzzle velocity of 1300 fps and KE of 2100 ft/lb. Charge on tiny ball= -2.4 nC The force shown in the force vs. time diagram in Figure P6.15 acts on a 1.5-kg object. Question: D Question 3 2 pts Bullets from two revolvers are fired with the same velocity. So it takes really top marksmanship, or a tripod, to aim the gun so accurately that this effect can be measured. The bullet from gun #1 is twice as heavy as the bullet from gun #2. The effect of case capacity can be demonstrated in a comparison of the 9 mm parabellum (para) with the 357 magnum. This is the bullet's energy as it leaves the muzzle, but the ballistic coefficient (BC) will determine the amount of KE delivered to the target as air resistance is encountered. If wire B is double the length and has a diameter four times as large as wire A, what is the resistance of wire B? Take $r$ to be the position. Why do bullets shoot through water but not through sand? In treating shotgun injuries, it is necessary to remember that the plastic shell carrier and the wadding (which may not appear on radiographs) can also cause tissue damage and may need to be found and removed. All Rights Reserved. You can see the two bullets land almost at the same time; because there is no drag, the time taken is almost exactly the same as that for the one marked "Drop". The bullet from gun #1 is twice as heavy as the bullet from gun #2. Find the magnitude of the momentum change of the ball? Wounding is a function of the type of shot, or pellets, used in the shotgun shell. . Joseph Von Benedikt visits with Aaron Oelger from Hodgdon about the unprecedented demand on the shooting supply industry. Learn the difference between revolvers and semi-auto pistols and what makes them different. FIGURE P10.30, In research in cardiology and exercise physiology, it is often important to know the mass of blood pumped by a persons heart in one stroke. The form factor value I decreases with increasing pointedness of the bullet (a sphere would have the highest I value). Our shooter is in a space suit, and the enclosed shooting range is pumped down to a vacuum. Why do you think so? Pigskin has been employed to provide an external layer to blocks of compounds such as ordnance gelatin or ballistic soap. Were I to reopen this quest for answers today, 35 years later, I would fire additional bullet weights unavailable in 1984, try more gun makes like the Ruger 9mm, and add the 10mm Auto. Figure P9.13. The bullets time in the air, having been fired horizontally, depends on it's velocity. The ratio of the momentum imparted to gun #1 to that imparted to gun #2 is: a) 2:3 b) 3:2 c) 2:1 d) 3:1 e) 6:1 Advertisement wagonbelleville Answer: The single entrance wound with limited area of tissue damage suggests a shotgun slug, while the small lead fragments within the wound suggest small size shot pellets, but together these findings are characteristic for the IRP (Nelson and Winston, 2007). When calculating CR, what is the damage per turn for a monster with multiple attacks? this tells us the expectation value of the A operator (Russel et al, 1995). $$ \vec{r_b}(0) = <0,h>$$ The ratio of the momentum imparted to gun #1 to that imparted to gun #2 is: A)2:3 B)3:2 C)2:1 D)3:1 E)6:1 9. What is Wario dropping at the end of Super Mario Land 2 and why? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. What can be learned from specific cartridge data? The ratio of the momentum imparted to gun #1 to that imparted to gun #2 is 2:1 3:1 6:1 3:2 O 2:3 Save for Later Submit Answer Hollowpoint bullets that give good penetration and expansion in a revolver at 1,200 to 1,300 fps can become fragile, varmint-class bullets at rifle velocities. Actually, assuming ideal conditions, and no aerodynamic effects, the dropped bullet should hit the ground first because of the curvature of the Earth. It could be fun. At close range (less than 4 feet) an entrance wound would be about 1 inch diameter, and the wound cavity would contain wadding. For the other, I'll very simply address the angular sensitivity. Freebore is usually a rifle feature. Rapid incapacitation may occur with massive bleeding from major blood vessels or the heart. Bullets fired from a rifle will have more energy than similar bullets fired from a handgun. I dont have a Model 547 today, but that didnt stop me from revisiting it. Some law enforcement agencies have adopted such bullets because they are thought to have more "stopping power" at short range. a) In series Learn more here: http://bit.ly/1G7xXag. Today, you can find 22 LR cartridges with bullet weights ranging from 29 grains to 60 grains with 40 grains being the most common. But do you know how to properly use them? The Polyshok Impact Reactive Projectile (IRP) is a form of shotgun ammunition with a lead bead core encased within a single, plastic projectile. I ran into this problem on Quora recently, and decided I would post an expanded version of the answer I gave there, here. To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine. Thus, close range wounds are severe, but at even relatively short distances, wounding may be minimal. Round nose bullets provide the least braking, are usually jacketed, and are useful mostly in low velocity handguns. Connect and share knowledge within a single location that is structured and easy to search. c) 10resistance . Though the square of the velocity would increase KE much more, it is practically very difficult to increase velocity, which is dependent upon the amount of gunpowder burned. More choke means less spread. What would a bathroom scale show if a 50 kg | The Model 1917 had a half-inch barrel advantage over the Government Model but also had typically loose World War I military service tolerances, including a barrel/cylinder gap crowding 0.009 inch. There is a difference between full metal jacket (FMJ) and total metal jacket (TMJ) bullets. Example of yaw. Note that this value is just a value sufficient to completely screw up the experiment so you would ideally want it 10x or more smaller than this. The projectile can penetrate to a depth of 25 mm at a range of 1 meter and up to 15 mm at a range of 5 meters. Gun #1 weighs three times as much as gun #2. The effect is small. Before there were scopes or red dots there were iron sights. Federal has created a safer, easier and more reliable way to shoot a muzzleloader. Why did DOS-based Windows require HIMEM.SYS to boot? for inexpensive guns, rimfire (R and A) 0.625 0.222 . I hope that explanation isn't too vague and helps you understand better what is going on. I'd accept Mark's as well if possible, but equations bring me out in hives. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Cavitation - A "permanent" cavity is caused by the path (track) of the bullet itself with crushing of tissue, whereas a "temporary" cavity is formed by radial stretching around the bullet track from continued acceleration of the medium (air or tissue) in the wake of the bullet, causing the wound cavity to be stretched outward. Designing a bullet for efficient transfer of energy to a particular target is not straightforward, for targets differ. A "magnum" load has slightly more powder and more pellets, so that the muzzle velocities are not greatly increased, but the total kinetic energy is greater because of the greater mass of pellets. Nutation refers to small circular movement at the bullet tip. answered expert verified Bullets from two revolvers are fired with the same velocity. Give a reason for your answer. Thats over half. The guy on top is correct. The motion in the 'z' direction is exactly yhe same as for the dropped bullet: z(t) = z(0) - (a/2)(t^2), and z(0) = 6 feet. (Grocock, et al) Air guns are usually never included in gun regulation. Mass of stick(m)= 3.8 kg Experts are tested by Chegg as specialists in their subject area. The bullet from gun #1 is twice as heavy as the bullet from gun #2. The bullets start out with exactly the same trajectory. This expansion is desinged to occur in a delayed fashion at the muzzle velocities of the bullet in order to provide deeper penetration. Weight, in general, is a constant for a shell so that 1 ounce of shot would equal either 9 pellets of 'double O' buckshot or 410 pellets of #8 birdshot. Bullets from two revolvers are fired with the same velocity. Now, here is the tricky part: when does the shot bullet hit the floor? That's its terminal velocity. I would highly recommend to use SI-unit (meter/second), or maybe derived km/hour. Though considered of low energy and relatively "safe" for children to use, they can cause severe injury, such as to the eye, and even to abdominal organs. What is the potential difference of the circuit? We further define our coordinate system such that the 'x' direction remains locked in the direction of fire after the bullet is fired (does not turn or move with the Earth. If the kinetic energy of a particle triples, the velocity increases by a factor of 3. $$ V_p t \sin{\theta} \approx V_p t \theta \ll h$$, $$ \theta \ll \frac{h}{ V_p t} = \frac{1}{V_p} \sqrt{\frac{g h}{2}} $$. You have horizontal and vertical planes for velocity and acceleration. P6.42). Weight of player A with equipment is, A: Measuring the speed of a vehicle is an essential task for maintaining safety on the roads. The bullet from gun #1 is twice as heavy as the bullet from gun #2. Mark's answer is much more complete in terms of what would happen in the world we live in. C. Markovnikov rule On the upper surface of Jupiter's atmosphere, the attractive force of gravity is 2.5 times that on Earth. Final answer in micrometers. There is only so much gunpowder that can burned efficiently in a cartridge. Two bullets having different masses, fired at the same time with the same kinetic energy, will have the same velocity. Therefore, the energy transmitted to the bullet (with a given mass) will depend upon mass times force times the time interval over which the force is applied. b) 14resistance The best answers are voted up and rise to the top, Not the answer you're looking for? Someone standing on the shore watching would think that objects in the ship are falling in parabolic trajectories with constant forward speed equal to the ship's speed, but someone in the ship thinks thinks they fall straight down. A. Now imagine two bullets. Despite yaw, an intact bullet that comes to rest in tissue generally has its long axis aligned along the path of the bullet track, though its final position may be either nose forward or base forward. 3:2 C. 2:1 D. 3:1 E. 6:1" blueeyes_11 about 9 years ago Physics Comment Folder's list view has different sized fonts in different folders. Radial vs. Directional Muzzle Brakes: Which Is Best? By Galilean relativity, the bullet on the ship falls in the same amount of time as a bullet that's simply dropped, so the bullet fired from the gun falls in the same amount of time as a bullet that's simply dropped, too. At close range, they may produce substantial injury. From a height of, say, 6 feet, it will hit the floor in about 0.25 seconds ("about 0.25" --> I'm trying to keep the math simple). Fluid-filled organs (bladder, heart, great vessels, bowel) can burst because of pressure waves generated. The metal casing encloses the powder, above which the bullet is seated. The bullet from gun #1 is twice as heavy as the bullet from gun #2. (Wilson, 1977) An M-16 rifle (.223 cal) is designed to produce larger wounds with high velocity, lower mass bullets that tumble, cavitate, and release energy quickly upon striking the target. Calculate the mass of blood that leaves the heart. Key: R=made for revolver; A=made for semi-automatic; velocity in fps. Shoot it to the West, and it will seem a little heavier.