Bullet Definition and 645 Threads

Homework Statement I have a problem in which I don't understand what is supposed to be solved. This is the exact question: "A silo-based Inter-Continental Ballistic Missile has a range of 8000 miles. If the Earth is presumed to be a sphere with circumference 24,000 miles, what percentage...

A 10.0-g bullet traveling at 200 m/s strikes a fixed wooden block. The bullet comes to rest 22 cm inside the block. The magnitude of the force exerted on the bullet by the block over its 22-cm travel is shown in graph below. Find the value of Fmax. my attempt: p=mv=(0.01kg)(200m/s)=2J...

1. Team 1 is racing out of the house to try to beat Team 2 to a site. They hop into the Convertible Porche Corvette Hybrid Jaguar that team 1 drives, and zoom away. If their position as a function of time is given by the equation x(t) = 3.81t3 + 9.882t2 + 18.6497t + 53.8946, determine the jerk...

Homework Statement A 0.005-kg bullet traveling horizontally with a speed of 1.00 103 m/s enters an 17.2-kg door, imbedding itself 9.8 cm from the side opposite the hinges as in the figure below. The 1.00-m-wide door is free to swing on its hinges. relevant img...

Hi guys, Just a simple question about space and bullets. I realize this topic comes up a lot, but specifically the only answer I can find is that of the shooter moving back with an equal and opposite force to the bullet, by the conservation of momentum. Rather, (and ignoring for a moment...

im missing something that probably would be covered in a basic physics class, bat alas i have had no prior courses. say you have an E-bomb, armed, but not detonated yet. you are on a moving ship cruising at 99.99% the speed of light. you throw the bomb ahead of the ship and detonate it. would...

Hello everyone. I am new here and am quite excited to start learning about physics which intrigues me greatly. I"m not studying physics or anything like that but just very interested in it and wish to work my way up to asking more advanced questions but first feel I need to be able to grasp some...

Everyone points to the Bullet Cluster as the best proof of Dark Matter. But I have a few questions about the rationale. There are aspects of the proof I don't understand. 1) What is the mechanism which makes the interstellar gas visible at such a distance in this particular case? Is all...

Homework Statement A bullet of mass 0.04kg is fired horizontally into a wooden block of mass 0.09kg. the wooden block is suspended from the ceiling by a long string. after an impact the bullet is embedded in the block and bullet and the block swing together until the block is 0.10m above its...

Homework Statement A bullet with a mass of 7.00g is fired horizontally with a speed of 450m/s , into a wooden block with mass of 0.810kg , initially at rest on a level surface. The bullet passes through the block and emerges with its speed reduced to 140m/s . The block slides a distance of...

Homework Statement A bullet with a mass of 7.00 g is fired horizontally with a speed of 420 m/s, into a wooden block with mass of 0.820 kg, initially at rest on a level surface. The bullet passes through the block and emerges with its speed reduced to 130 m/s. The block slides a distance of...

1. Homework Statement [/b] Bullet B weighs 0.5 oz and blocks A and C both weigh 3 lb. The coeffient of friction between the block and the plane is \muk = .25. Initially the bullet is moving at v0 and blocks A and B are at rest. After the bullet passes through A it becomes embedded in block C...

1. Homework Statement A bullet of mass m is fired into a block of mass M initially at rest on a frictionless table of height h. The bullet remains m in the block, and after impact the block lands a distance d from the bottom of the table. Determine the initial speed of the bullet. 2...

Homework Statement A bullet of mass m is fired into a block of mass M initially at rest on a frictionless table of height h. The bullet remains m in the block, and after impact the block lands a distance d from the bottom of the table. Determine the initial speed of the bullet. Homework...

X________________ moving | observer | | ---> v (moving speed train) photon | ^________________| X________________ ^ moving | ^ ^ observer | d1 ^ ^...

Homework Statement An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of height 1 m. The bullet remains in the block, and after the impact the block lands 2 m from the bottom of the table. Determine the initial speed of the bullet. Homework...

Given that there is no wind, if you shoot a bullet straight up, when it comes back down will it be going fast enough to kill someone? I know it won't be going as fast as it was leaving the barrel of the gun because of air resistance on its trip back down, but I'm just wondering if it would still...

Homework Statement A Bullet of ice at a temperature of 0 degrees celieus is fired into a target Assuming that all the impact energy is retained by the ice what impact velocity is needed to melt 68% of the ice Homework Equations 1/2mv^2 Q = ml The Attempt at a Solution i got.. v^2 =...

A 22 g bullet is fired from a rifle. It takes 2.55 10^-3 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 730 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet m=22g is a=0 ? since its...

A bullet fired vertically upwards with a beginning speed 70 m / s. In this task, we shall assume that the sphere is exposed to air resistance is proportional to the speed, and given by. Proportionality constant k = 1.6 * 10 ^ -2 kg / s and the bullets mass m = 0.100 kg. We expect that the...

I've spent the last hour or so googling this, and couldn't find anything straightforward. I thumbed through my thermo book and didn't come up with anything either. So I figured I'd ask you guys. I think this is a simple mechanics problem. I had been thinking about this last night, and figured it...

Hey guys, I wondered if you could give me a hand with this? 1.A marksman follows a rapidly moving target by swinging his rifle from left to right about a vertical axis whilst holding the barrel horizontal. Just as the bullet is about to leave the barrel it has a muzzle velocity of 800 ms-1...

Homework Statement A rifle bullet with a muzzle speed of 330 m/s is fired directly into a special dense material that stops the bullet in 25.0 cm. Assuming the bullet's deceleration to be constant, what is its magnitude? x=25.0cm V=330 m/s Homework Equations ? The Attempt at a Solution I...

Homework Statement The M61 Vulcan cannon is a Gatling Gun-type weapon deployed on an aircraft. It fires a 100g, 20mm diameter projectile at a rate of up to 6,000 shots per minute. Barrel length is 170cm, and muzzle velocity (speed of the projectile leaving the barrel) is 1030 m/s...

Homework Statement A .22 rifle bullet, traveling at 357 m/s, strikes a block of soft wood, which it penetrates to a depth of 0.131 m. The block of wood is clamped in place and doesn't move. The mass of the bullet is 1.65 g. Assume a constant retarding force. What is the average speed of the...

So today in physics my teacher was talking about the bullet train that is in japan. SO this train is traveling at 190 miles an hour, and on this day there is no gravity and no air. a man walks to the back of the train and fires a bullet from the back. My teacher said that a person watching...

Homework Statement A gunman shot a bullet with a speed of 10ms-1 which just penetrates into a plank of wood. So with what speed should he fire the bullet so that it passes through 10 similar planks? Homework Equations Newtons equations of motion. The Attempt at a Solution v2 - u2 =...

1. Homework Statement A 4kg block resting on frictionless surface is attached to spring of k=100n/m. A 2g bullet is fired at 100m/s at the block. What is the period and amplitude of oscillations? 2. Homework Equations 1/2mv2 = kinetic energy 1/2kx2 = elastic energy 2 x pi x...

I was wondering what a bullet would look like to an outside observer traveling at near (.9999999 or so) the speed of light. Ignoring everything else and all the problems in it, if someone fired a bullet at you going almost the speed of light, would it actually appear to be moving quickly enough...

I have been involved in a discussion concerning the behavior of a bullet during flight. It seems there are long distance shooters who expirence a better MOA at 300+ yards than at 100 yards. The theory pit forth is that when a bullet leaves the muzzle, it is not stable in its flight. This lack...

Homework Statement A 5.00g bullet moving at 600.0 m/s penetrates a tree trunk to a depth of 4.00 cm. A) Use work and energy considerations to find the magnitude of the force that stops the bullet. B) Assuming that the frictional force is constant, determine how much time elapses between...

Homework Statement A person holds a rifle horizontally and fires at a target. The bullet has a muzzle speed of 170 m/s, and the person hears the bullet strike the target 1.30 s after firing it. The air temperature is 72°F. What is the distance to the target? Homework Equations...

Homework Statement An 8 kg bullet is fired into a stationary 9 kg block of wood which is free to move. The bullet is stopped in the wood which has a velocity of 40 cm/s after the impact. What was the speed of the bullet? Homework Equations The Attempt at a Solution

Homework Statement A bullet of mass m is fired into a large block of wood, mass M, suspended by two long cords. The bullet comes to rest in the block so that the system swings upwards, coming to rest after traveling through a vertical distance h. Find in terms of m, M, and h: the initial...

A bullet of mass 7.00 g is fired horizontally into a wooden block of mass 1.29 kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.180. The bullet remains embedded in the block, which is observed to slide a distance 0.230 m along the surface...

Homework Statement A 7.0-g bullet is fired into a 1.5-kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 12 cm. Find the initial speed of the bullet. Homework Equations Conservation of Momentum The Attempt at...

Homework Statement A bullet of mass m is fired with horizontal velocity u at a block of mass M. The bullet embeds itself inside the block. The force of resistance of the block is constant. Find the depths of penetration in the cases: a) The block is held fixed. b) The block is free to...

Homework Statement A mass of M=0.5kg is suspended from a fixed pivot by a thin rope of length l=120cm. The mass is struck by a bullet of mass m=10g with a speed of v=150m/s which embeds itself into the lead mass. What angle does the combined mass swing back to? The Attempt at a Solution...

Hello, I'm creating a slide-show presentation that describes how a shape charge explosion (namely that of an improvised explosive formed projectile) is more effective than that of a bullet projectile. I would like to include visuals and equations which describe how the initial explosion...

Homework Statement As part of a forensic experiment, a 50g bullet is fired horizontally into a 2.0kg wooden pendulum. The pendulum with the bullet embedded in it rises 15cm vertically from its initial position and stops. a) Calculate the velocity of the block and bullet just after the...

Homework Statement A 4.66 g bullet moving with an initial speed of vi = 410 m/s is fired into and passes through a 1.18 kg block.The block, initially at rest on a frictionless horizontal surface, is connected to a spring with a spring constant of 844 N/m. a) If the block moves x = 4.01 cm to...

Homework Statement A bullet mass(b) .008 kg is fired (and embedded) into a block mass(B) 0.992 kg on a horizontal frictionless surface. The spring is compressed 0.15 m on impact. The spring's constant is 300 N/m. Q: What is the block's velocity after impact Q: What is the initial speed of...

a 5.3g bullet leaves the muzzle of a rifle with a speed of 618.9 m/s. What constants force (N) is exerted on the bullet while it is traveling down the 0.8m lengh of the barrel of the riffle?

Homework Statement Hey guys here is my problem: A bullet is fired horizontally into a wood block attached to a string,the bullet sticks in the block.Calculate the velocity of the bullet if the impact causes the block to swing 10cm above its initial level. Bullet=15g, Block=3kg,Height=10cm...

Homework Statement You have been asked to design a "ballistic spring system" to measure the speed of bullets. A spring whose spring constant is k is suspended from the ceiling. A block of mass M hangs from the spring. A bullet of mass m is fired vertically upward into the bottom of the block...

The bullet hits near the top of block. Which will tip the block over? Which will do most damage? I believe the rubber will tip it over and the metal will do the most damage...but I'm not sure how to explain it. When the metal hits it enters the block. When the rubber hits there is a...

1. Anyone interested in looking over the question / coments, thanks. An object mass 0.6kg is fired vertically upward in thebarrel of a gun by a vertical force of 50N acting over a period of 0.5 seconds. Calculate A. The velocity of the projectile when it leaves the barrel B. Height reached by...

Homework Statement A wooden block with a length of 10 cm and a mass of 1 kg lies on an icy plane. A projectile with mass of 2 g hits the wooden block with velocity of 300 m/s and breaks through its center of gravity. How much are the final velocities of the wooden block and the projectile...

Homework Statement A bullet with a mass of 6.30 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 1.95 kg block, and embeds itself in a second 2.00 kg block. Speeds v1 = 2.50 m/s and v2 = 3.40 m/s...

Homework Statement From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.48 m, and x = 6.0 m.) Using...