Bullet Definition and 645 Threads

[SOLVED] Bullet, block, kinetic energy 1. A small block of mass 2m initially rests on a track at the bottom of a circular, vertical loop-the-loop, which has a radius r. The surface contact between the block and the loop is frictionless. A bullet of mass m strikes the block horizontally from the...

Homework Statement A bullet, having a mass of 18g and traveling with a velocity of 1200 m/s strikies a wooden block and pentrates 2.5m. What is the average force exerted by the block on the bullet? Homework Equations W= F*total distance W= .5*m*V2^2 - .5*m*V1^2 The Attempt at a...

[SOLVED] Momentum of bullet fired into target In a ballistics test, a 23.0 g bullet traveling horizontally at 1100 m/s goes through a 40.0 cm-thick 250 kg stationary target and emerges with a speed of 800 m/s. The target is free to slide on a smooth horizontal surface. What average force does...

Does a bullet speed up after leaving the gun?

[SOLVED] bullet speed and thermal equilibrium Homework Statement A 11.7 g lead bullet is tested by firing it into a fixed block of wood with a mass of 1.15 kg. If the block and imbedded bullet together absorb all the heat energy generated and, after thermal equilibrium has been reached, the...

I recently had a test question that gave a force acting on a bullet. The bullets mass is 0.016KG, and the force acting on the bullet is f=7000N-2.2*10^6N/s*t. The bullet is traveling 800 k/h when it leaves the gun It asked to find the total linear impulse on the bullet, and then how much...

Homework Statement 1. Homework Statement [/b] A 10.0g bullet is shot through a 1.0 kg wood block suspended on a string 2.0m long. The center of mass of the block rises a distance of 1.0cm. find the speed of the bullet as it emerges from the block if its initial speed is 450m/s.Homework...

Homework Statement A 10.0g bullet is shot through a 1.0 kg wood block suspended on a string 2.0m long. The center of mass of the block rises a distance of 1.0cm. find the speed of the bullet as it emerges from the block if its initial speed is 450m/s.Homework Equations I think this has to do...

Homework Statement A rifle bullet with mass 8.00g strikes and embeds itself in a block with mass 0.992 kg that rests on a frictionless, horizontal surface and is attached to a coil spring. The impact compresses the spring 15.0 cm. Calibration of the spring shows that a force of 0.750 N is...

Ok, I'm not the best physics student and I may have bitten off a bit more than I can chew with this project I am trying to find the velocity of a bullet while it is inside the barrel of a gun at three different points. The mass of the bullet is 13g, and the Force acting on the bullet is...

If you are standing atop a 2 story building and fire a bullet vertically towards the ground and drop one from the same height will they arrive at the same time? I am not a physics person but my girlfriend is in it now and tells me that they would arrive at the same time. I don't see this to be...

[SOLVED] Horizontal Speed of bullet fragment Homework Statement A 14-kg shell is fired from a gun with a muzzle velocity 125 m/s at 33o above the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the...

Homework Statement A gun is fired vertically into a 1.80 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 190 m/s, how high will the block rise into the air after the bullet becomes embedded in it? _____m Homework Equations Vf^2-Vi^2=2ax...

Homework Statement A bullet with a mass of 3.55 g is fired horizontally at two blocks resting on a smooth and frictionless table top as shown in the Figure. The bullet passes through the first 1.00 kg block, and embeds itself in a second 1.95 kg block. Speeds v1 = 1.80 m/s and v2 = 3.00 m/s...

A friends father told him that a hydroshock bullet (a type of hollowpoint bullet that spreads out on impact and ussually doesn't exit the target) shot into a mans palm from ten feet away would impart a force on the rest of his body equal to being hit by a semi truck. I know this is ridiculous...

Homework Statement A 500g pistol lies at rest on an essentially frictionless table. It accidentally discharges and shoots a 10g bullet parallel to the table. How far has the bullet moved by the time the gun has recoiled 2.00mm? Homework Equations 0=m1v1+m2v2 m1v1= (m1+m2)Vf The...

Homework Statement Derive a formula for the bullet speed v in terms of D, T, and a measured angle between the position of the hole in the first disk and that of the hole in the second. If required, use \pi, not its numeric equivalent. Both of the holes lie at the same radial distance from...

This is my first physics question (and hopefully not my last) I've been wondering about what happens when you fire a gun in a situation with no gravity (or atleast no gravity of the Earth's) but when there is air and frictional forces present. People have tried to convince me that the bullet...

Homework Statement A rifle is aimed horizontally at a target 44m away. The bullet hits the target 3.0 cm below the aim point. a.) What was the bullet's flight time? b.) What was the bullet's speed as it left the barrel? Homework Equations Xf = Xi +Vixt + 1/2(a)(t^2) Vfx = Vix + at...

Hi I've been having an argument with a few friends about a theory of mine (based on what i can remember from my physics lessons and common sense (i think lol). My theory is this. There is a train traveling at 100mph in one direction There is a man with a gun standing at the back of the...

Homework Statement A 10-g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s. To what maximum height will the block rise above its initial position? Homework Equations K = (mv^2)/2 W...

if i shoot a bullet to the sky and then the bullet falls to the ground at the same point that I am standing...will i die? the bullet's start velocity should be same as final velocity...from the equation E=1/2mv^2 shows that the energy when i start shooting = energy when the bullet falls to the...

Hi. If you were on a train going 700mph and you shot a gun out the back that fired at 700mph. Would the bullet drop straight to the ground relative to the earth?

Homework Statement 1. A bullet traveling at a speed of 360 m s-1 is stopped by a sandbag. Assuming half of the energy of the bullet becomes heat energy that is absorbed by the bullet, calculate the increase in temperature of the bullet. (Specific heat capacity of bullet = 160 J kg-1 C-1)...

Perhaps this question involves too many factors to consider and lends itself to being overly speculative but... What would seem to be the most important ballistic property of a bullet in determining lethality? (coming from another forum trying to get an answer from a more qualified group -...

Homework Statement An 16.2 g rifle bullet traveling 240 m/s buries itself in a 3.54 kg pendulum hanging on a 2.90 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement. Homework Equations I used the Y center...

Homework Statement An 8.9 g bullet leaves a rifle's muzzle at 456.6 m/s. The barrel is 0.5 m long. What is the force exerted on the bullet as it travels the length of the barrel? Answer in N. Homework Equations F = ma V = d/t (so T = d/v) a = v/t The Attempt at a Solution I tried to do...

A 2.65g aluminum bullet at 31.4°C is fired at a speed of 209 m/s into a large block of ice at 0°C, in which it embeds itself. What quantity of ice melts? Q=(9.00E2)(.00265)(31.4)=74.889J 74.889J=m(33.5E4)=2.23E-4kg so i get a final answer of 2.23E-4kg but its wrong. i think I am either...

http://www.msnbc.msn.com/id/18709539/ The never ending saga...

I am a little confused over a problem I found whilst reading through an example A-level Mechanics exam paper. The problem is on the Mechanics M2 paper, question 2. This question asks for the magnitude of a resistive force that slowed a bullet, of mass 6 grams, from 400m/s to 250m/s. If...

Unfortunately I was absent when a similar example was done in class... Homework Statement [FONT="Courier New"]A 10 g bullet traveling at 400 m/s strikes a 10 kg, 1.0-m-wide door at the edge opposite the hinge. The bullet embeds itself in the door, causing the door to swing open...

Homework Statement Hi I am taking a self study physics course and not sure about the following question. Any help would be much appreciated. Thanks 1. A 15.0 g bullet is fired at 840 m/s into a ballistic pendulum consisting of a 24.0 kg bag of sand. If the bag rises to a height of...

Bullet is fired at a block resting on a table. The velocity of the bullet is 390 m/s and has a mass of .007kg. The mass of the block is .850kg. The bullets penetrates the block and exits it with a velocity of 130 m/s causing the block to slide a distance of .410 m. What is the coefficient...

Homework Statement A bullet of mass 4 g moving with an initial speed of 300 m/s is fired into and passes through ta block of mass 5kg. The block, initially at rest on a frictionless horizontal surface, is connected to a spring of force constant 600 N/m. If the block moves a distance of 1.6...

Homework Statement A bullet of mass m is fired with a velocity of 50m/s at an angle x. At the top of its trajectory it hits a bob of mass 3m hanging by a string 3.3 m long and gets imbedded in it. The string rotates by an angle of 120 degrees. Find x and the coordinates of the bob wrt the...

Hello, thanks for even stopping in here... My Q: (and beggin' for help ;/ ) Is there a basic mathematical "sentence", where you can "plug in" variables, ie- Vel / angle / projectile weight/ target impacted (makeup) ,etc? I, and this will probably make you laugh, am TERRIBLE @ math. I...

Hi. I was wondering if it's possible to calculate bullet accuracy in terms of percentage in a series of ranges, given bullet's max effective range, a series of ranges, bullet mass and velocity with gravity (assuming no wind resistance, or any frictional resistance). I'm looking for a...

Homework Statement a 3 gram bullet traveling at 350m/s squared hits a tree and slows down uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What was the force exerted on the bullet bringing it to rest? Homework Equations The Attempt at a SolutionI...

Hey guys, I just discovered this forum and have a question for yall. I am by no means an expert in physics. I've taken general physics I and II, but my physics knowledge stops there. Hate to do this, but I've got to ask a question pertaining to a Mythbusters episode that I just saw. They...

Homework Statement a rod with mass 'M' and length 'L' is pivoted about a frictionless axle through it's end .a bullet with mass 'm' and speed 'v' is shot and sticks to the rod a distance 'a' from the axle. I need to find the LINEAR momentum of the system just after the hit. Homework...

A bullet with an initial velocity of v0, temperature t0(melting temperature), goes through a wall, and its velocity reduces to v. You know Lb(latent specific heat). You are asked to derive the ratio between the final mass of the bulet and the initial one.Oh, and you know that the energy lost by...

Homework Statement A bullet of mass 9 g moving with initial speed 300 m/s passes through a block of mass 4 kg, initially at rest on a frictionless, horizontal surface. The block is connected to a spring of force constant 904 N/m. If the block moves 2 cm to the right after the bullet passed...

u hv a gun wid 6 bullets.NOw... 1) u take out 3 bullets in sequence one by one and revolve it. 2) u take out 3 bullets randomly with no sequence and revolve it. After revolvin it.. u fire! in which case u have higher probability of bullet being fired in the first shot!

Homework Statement A 7.45g bullet has vi = 353 m/s. It strikes the 0.725 block of a ballistic pendulum and passes completely through the block. If the block rises through a distance h = 12.1 cm, what was the velocity of the bullet as it emerged from the block? Homework Equations...

I worked this problem out, but my numbers make me think that my solution is wrong. Can you check this for me? A 5.00 g bullet moving with an initial speed of v0 = 420 m/s is fired into and passes through a 1.00 kg block. The block, initially at rest on a frictionless horizontal surface, is...

Homework Statement A 1.01x10^-2 kg bullet is fired horizontally into a 2.49kg wooden block attached to one end of a massless, horizontal spring (k=831 N/m). The other end of the spring is fixed in place, and the spring is unstrained initially. The block rests on a horizontal, frictionless...

can anyone explain the precess on how to make kevlar, or ceramic plate armor even vectran , the knife resistant material would be helpful.

Homework Statement A Lufthansa A320 accelerates from rest to lift-off speed of 72.99 m/s in 25.00 s. Each of the plane's two jet engines provides a forward force (thrust) of 103.00 kN. What is the mass of the plane? How far does it travel down the runway before lift-off? 2. Governing...

This problem is causing me quite a bit of grief and I could really use a guiding hand to tell me where I am going wrong. Here is the set up, then after that is what I've used to tackle it so far. You are a world-famous physicist-lawyer defending a client who has been charged with murder. It...

Hi. There's this question that was posed. And I'm totally lost.:redface: If my professor explained how it's all derived it would've been useful. Here we are: A bullet and a proton have the same momentum. Which has the longer wavelength? Any help? Thanks, Cataklyzm