Bullet Definition and 650 Threads

Homework Statement A bullet with a mass of 15 grams is fired from a rifle with a barrel that is 85 cm long. a. assuming that the force exerted by the expanding gas to be a constant 7200N, what speed would the bullet reach? Homework Equations Ek= 1/2mv^2 Work= Force x distance The...

Homework Statement A bullet of mass 0.0022 kg moving at 488 m/s embeds itself in a large fixed piece of wood and travels 0.56 m before coming to rest. Assume that the deceleration of the bullet is constant. What force is exerted by the wood on the bullet? F = N 1.01 NO HELP: Find...

mechie's i saw some news footage awhile ago and the troops were running across an airport runway being sniped at. where are they at with developing and issuing shields now? anybody have first hand experience. is the thinking keep the heavy pack on so you don't get shot in the back? if so...

V^2=Ae^-2kx - g/k (upward motion) V^2=g/k - Be^2kx (downward motion) Use the above result to show that , when the bullet hits the ground on its return, the speed will be equal to the expression Vo Vt / (Vo^2 + Vt^2)^0.5 In which Vo is the initial upward speed and Vt= (mg/C2)^0.5=...

If I have a bullet shaped container in a narrow tube and the back flat side has 350 psi air pressure filling behind the bullet and the front side (the conical side) is facing down in 300 psi water will the bullet be forced out of the tube into the water? If the bullet has a density of .99...

Hi, I'm modelling a bullet impacting with a wall, I wish to know how much force the bullet hits the wall with. Will it simply be a case of F=mv ?

Homework Statement A bullet shot underwater will experience "viscous drag" and follow this velocity equation. vx(t)=voxe-bt What is the maximum position of the bullet (if you were to wait a long time, what will its position be)? Given: vox=247m/s b=0.53 s-1 x0=47.9m Homework Equations...

Magnetic bullet fired through a coil can fire another bullet (no amplifiers, batteries, etc. are involved) A magnetic bullet, fired through the middle of a coil, can induce enough current that a nichrome wire connected to the ends of the winding gets hot red and is able to ignite a charge of...

Homework Statement A 5cm long, 30g lead bullet strikes a wall at 27°C and melts on the wall without splatter. How fast was it going? What is the force on the wall? If the wall is made of 1kg of marble, what temperature will it reach? Homework Equations I don't know how to find the...

Say we shoot a bullet that travels in the theta = 0 direction (we are in spherical coordinates). Say the bullet strikes and sticks to a half-infinite isotropic elastic solid that begins at the theta = 90 degrees plane. Is it true that longitudinal waves generated by the bullets impact will be of...

Homework Statement A(n) 9 g bullet is fired into a 396 g block that is initially at rest at the edge of a frictionless table of height 0.9 m. The bullet remains in the block, and after impact the block lands 2.3 m from the bottom of the table. The acceleration of gravity is 9.8 m/s. Homework...

Homework Statement A(n) 9 g bullet is fired into a 303 g block that is initially at rest at the edge of a frictionless table of height 1.9 m. The bullet remains in the block, and after impact the block lands 1.5 m from the bottom of the table. The acceleration of gravity is 9.8 m/s/s. Find...

Homework Statement See problem here: http://i184.photobucket.com/albums/x153/spl10246/problem.png Solution: http://i184.photobucket.com/albums/x153/spl10246/solution1.png http://i184.photobucket.com/albums/x153/spl10246/solution2.png Homework Equations p = m * v K = .5 * m *...

Homework Statement A 50 g bullet at 50 m/s hits a block 2.0 m away. The coefficient of friction is 0.30. What is the force of bullet on the block, the velocity of the block and bullet and distance traveled by the block? Assume this is a perfectly inelastic collision. Known: m_b = .0050kg...

A bullet of mass 20 g strickes a fixed block of wood at a speed of 320m/s. The embeds itself into the block of wood, penetrating to a depth of 6.0cm. Calculate the average net force acting on the bullet while it is being brought to rest.

A bullet of mass 0.0025 kg moving at 470 m/s impacts a large fixed block of wood and travels 6.2 cm before coming to rest. Assuming that the deceleration of the bullet is constant, find the force exerted by the wood on the bullet. Answer in units of kN I know force= mass * acceleration...

Alright, this is my first experiment with this forum. Hopefully, I do this right! Homework Statement I'm going to give the problem in terms of variables, not the numbers I'm given, so that people can't give me a direct answer. A uniform thin rod of length (L)m and mass (M_R)kg can rotate...

Homework Statement 40-g Bullet is fired with a velocity of magnitude v0=700 m/s into a 5kg block of wood. Coefficient of kinetic friction = 0.6. a) how far will the block move b) how long after impact does it come to rest c) percentage of energy lost on impact (block has no velocity...

Homework Statement A bullet of mass 0.005kg is shot at a suspended block of wood with mass 1kg. The bullet initially has a speed of 200m/s, and passes through the block of wood. The bullet passes through the wood, and 50J of work is done deforming the shape of the bullet and block. If the...

[b]1. Homework Statement A shell is fired from the ground with an initial speed of 1.60*10^3m/s at an initial angle of 56° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. (b) Find the amount of time the shell is in motion. Homework Equations...

Homework Statement a pistol fires a 3-g bullet with a speed of 400 m/s. the pistol barrel is 13 cm long.(a) how much energy is given to the bullet? (b) what average force acted on the bullet while it was moving down the barrel? (c) was this force equal in magnitude to the force of the...

Homework Statement A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a block of wood with a mass of 0.095 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits the block, the speed of...

This is a simple enough question, but no one has been able to give me a satisfying explanation. Most people compare the momentum's of the bullet and the rock, and say that rock has a higher mass, so it's momentum is greater and it shatters the glass. I don't find this a convincing...

Homework Statement The device consists of two rotating disks, separated by a distance of d = 0.879 m, and rotating with an angular speed of 96.1 rad/s. The bullet first passes through the left disk and then through the right disk. It is found that the angular displacement between the two...

Homework Statement A 17 g bullet traveling 475 m/s strikes a 0.7 block of wood that is balanced on a table edge 0.7 m above ground. If the bullet buries itself in the block, find hte distance D at which the block hits the floor. Diagram: Homework Equations Wnc = delta KE + delta PE...

Homework Statement A 36 g rifle bullet traveling 310 m/s buries itself in a 5.2 kg pendulum hanging on a 2m long string, which makes the pendulum swing upward in an arc. Determine the maximum verticle displacement of the pendulum (height)(g=9.8m/s^2) Homework Equations Pi = Pf Law of...

Homework Statement A 5.1 g bullet leaves the muzzle of a rifle with a speed of 467 m/s. What constant force is exerted on the bullet while it is traveling down the 0.5 m length of the barrel of the rifle? Answer in units of NHomework Equations V2=Vo2+2a(x-xo) F=maThe Attempt at a Solution...

Homework Statement 22.0-caliber rifle bullet of mass 1.80 g, traveling at 320 m/s strikes a block of soft wood, which it penetrates to a depth of 0.140 m. The block of wood is clamped in place and doesn't move. Assume a constant retarding force. What force, in Newtons, does the wood exert on...

Homework Statement A bullet is shot through two cardboard disks attached a distance D apart to a shaft turning with a rotational period T, as shown. Derive a formula for the bullet speed v in terms of D, T, and a measured angle theta between the position of the hole in the first disk and that...

Homework Statement A 10g bullet strikes and becomes embedded in a 0.200kg block of wood placed on a horizontal surface just in front of the gun. If the coefficient of sliding friction between the block and the surface is 0.4 and the impact drives the block a distance of 8m before it comes to...

Apologies if this is the wrong forum but it's certainly a physics question I've been wondering about: I've been watching all this Libya stuff unravel on the news and can't help but notice all these guys firing their AK47s vertically upwards. Surely that bullet should then return to Earth at...

I'm trying to wrap my head around shock waves produced by bullets and their properties. In particular I'm interested in what affects the duration of the shock wave in time. Say someone shoots at me, the bullet passes near me, and I hear the shock wave produced by the bullet. If you look...

Let's say we have gun that fires a bullet at 1000 m/s horizontally when high up in a gravitational potential. Now we take the gun deeper into the gravitational well to a point where the gravitational redshift factor is higher by a factor of 4. Will the muzzle velocity be the same, faster or...

Hi everybody, I'm trying to calculate the spontaneous energy of a projectile fired by a rifle, handgun, or a canon. The amount of the powder in the cartridge is known and with a reasonable assumption of the following we can calculate the initial pressure produced in the chamber as the rifle...

A bullet of 0.005 kg traveling at 20m/s penetrates deeply into a fixed target and is brought to rest in 0.01 sec. The distace through which it penetrates is: I used, acceleration= V/t = 20/.01 a = 2000 m/sec sq Distace covered = Ut+0.5 at^2...

I'm trying to get a mask made that will deflect a incoming bullet, and in my mind geometry is the answer. I don't have the know how to do the math but if someone out there could help me out, that would be great.

Homework Statement A block of wood, of side 2a and mass M is on an horizontal plane. When it turns, it does it over the edge AB. A bullet of mass m<<M and velocity v hits on the opposite face to ABCD, at a height of 4/3*a. The bullets gets stuck on the block. Find the minimum value of v so...

I think this is a simple question but I cannot find the answer on the Internet. What trajectory would have a bullet if fired in a straight line towards space from the equator? 1- Assuming there is NO gravity involved, 2- Considering that the bullet is going at a constant velocity, 3-...

Homework Statement A 20-g bullet is fired into a 2.0-kg block of wood placed on a horizontal surface. The bullet stops in the block. The impact moves the block (+ bullet) a distance of 5 m before it comes to rest. If the coefficient of kinetic friction between the block and surface is...

Homework Statement A .007 kg bullet is fired into a 2 kg wooden block initially at rest on a level surface. The bullet passes through the block and emerges with the velocity of 200 m/s. The block slides .5 m and stops. If the coefficient of the friction between the block and and the surface...

1. A 2.3kg wood block hangs from the bottom of a 1.0kg, 1.2m long rod. The block and rod form a pendulum that swings on a frictionless pivot at the top end of the rod. A 10g bullet is fired into the block, where it sticks, causing the pendulum to swing out to a 33degree angle.Homework Equations...

1. A 4kg block is suspended vertically from a spring with k = 500N/m. A 0.05kg bullet is fired into the block from directly below with a velocity of 150 m/s and becomes embedded in the block. Find the amplitude of the resulting simple harmonic motion. Homework Equations V cm = (Bullet...

This question should be fairly simple, I think. What happens when you are in a spaceship orbiting around Earth and you shoot a bullet out the window right towards earth, i.e. towards Earth's center of gravity, assuming the mozzle velocity is much smaller then the orbital speed of the space...

Could someone please clarify if my understanding of the following is correct or not? When a bullet is fired from a gun or a bomb explodes, I thought I had read somewhere that, in the first few microseconds, the speed of the bullet or bomb blast is slow at first then increases to a maximum...

Hey guys, I've been a member of this site for a while now, looking at other people's homework problems and attempting them as extra practice. I find that reading about what other people have trouble with when attempting physics problems helps me avoid them myself, and it has worked pretty well...

Homework Statement In Figure (1), a 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.18 kg) and embeds itself in block 2 (mass 1.85 kg). The blocks end up with speeds v1 = 0.540 m/s and v2 = 1.47 m/s (Figure (2))...

Homework Statement A 2.5 kg wood block hangs from the bottom of a 1.0 kg, 1.2 m long rod. The block and rod form a pendulum that swings on a frictionless pivot at the top end of the rod. A 12 g bullet is fired into the block, where it sticks, causing the pendulum to swing out to a 33 angle...

1. Homework Statement In a certain region, the Earth's magnetic field has a magnitude of 5.30e-5 T and is directed north at an angle of 57° below the horizontal. An electrically charged bullet is fired north and 11° above the horizontal, with a speed of 681 m/s. The magnetic force on the...

I was reading a recent paper on arXiv.org on a novel simulation of MOND, and surprisingly they addressed the Bullet Cluster, which I guess is one of the more serious problems for MOND. What was even more surprising was that they said this posed a problem for Lamda-CDM models as well. Here is the...

Homework Statement Hi, A gun totally immersed underwater and shoot a bullet. Q1. Would there be a trail of bubbles behind the bullet? Q2. If there are bubbles, where do they come from? Q3. If there are bubbles, would the sum of the volume of all bubbles be equal to the volume of...