Bullet Definition and 650 Threads

Trajectory of a bullet with drag In most physics books, they pass over drag problems because of their difficulty. However, I had to do one for a mid-term for a physics class. When the velocity is low (tens of m/s or less), then the drag is proportional to the velocity and the math is quite...

Homework Statement A 20.0 g bullet moving horizontally at 70.0 m/s strikes a 9.00 kg block of wood lying at rest on the pavement. The bullet embeds itself in the block of wood during the collision. Find a. the speed of the block of wood immediately after the collision, b. the...

Homework Statement A 7.00 g bullet, when fired from a gun into a 1.00 kg block of wood held in a vise, penetrates the block to a depth of 7.60 cm. This block of wood is next placed on a frictionless horizontal surface, and a second 7.00 g bullet is fired from the gun into the block. To what...

Homework Statement A device consist of two rotating disks, separated by a distance of d = 0.85 m, and rotating with an angular speed of 95 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 bullet...

Stuck on this one problem which states: A bullet with a mass of 6.00 g, traveling horizontally with a speed of 370 m/s, is fired into a wooden block with mass of 0.750 kg, initially at rest on a level surface. The bullet passes through the block and emerges with its speed reduced to 120 m/s. The...

Homework Statement a rifle with a barell length of 60 cm fires a 10g bullet with a horizontal speed of 400 m/s. the bullet strikes a block of wood and penetrates to a depth of 12 cm. how long does it take the bullet to come to rest( from when it penetrates the block to when it stops)...

Homework Statement A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 785 m/s. The barrel is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.029 m below the center. What is the horizontal distance between the end of the rifle...

A 12 g bullet is fired into a 8.0 kg wood block that is at rest on a wood table. The block, with the bullet embedded, slides 5.0 cm across the table. The coefficient of kinetic friction for wood sliding on wood is 0.20. What was the speed of the bullet? Relevant equations My professor told us...

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. Now I think this is an imperfect inelastic collision because the...

Homework Statement .100-kg stone rets on a frictionless, horizontal surface. A bullet of mass 6.00g, traveling horizontally at 350 m/s, strikes the stone and rebounds horizontally at right angles to its original direction with a speed of 250 m/s. (a) Compute the magnitude and direction of the...

A bullet of mass 1.6×10−3 {\rm kg} embeds itself in a wooden block with mass 0.990 {\rm kg}, which then compresses a spring (k = 160 {\rm N/m}) by a distance 5.0×10−2 {\rm m} before coming to rest. The coefficient of kinetic friction between the block and table is 0.51. What is the initial speed...

Homework Statement A bullet is fired vertically into a 1.20 kg block of wood at rest directly above it. If the bullet has a mass of 24.0g and a speed of 540 m/s , how high will the block rise after the bullet becomes embedded in it? Homework Equations 1/2mv^2+mgh=1/2mvf^2+mgh mv=mvf...

Homework Statement A 27-g rifle bullet traveling 230m/s buries itself in a 3.3-kg pendulum hanging on a 2.9-m-long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's maximum displacement. x=? and h=? Homework...

Homework Statement A bullet of mass 0.0022 kg initially moving at 504 m/s embeds itself in a large fixed piece of wood and travels 0.72 m before coming to rest. Assume that the acceleration of the bullet is constant. What force is exerted by the wood on the bullet? F=N Homework...

I need some help with this question: Two people, who are traveling on a bullet train between Tokyo and Kyoto, are willing to tolerate acceleration magnitudes as large as 0.2 g. The driver wants to change speeds from 250 to 300 km hr-1 on a curved piece of track. If the radius of curvature...

An indestructible bullet 2.00cm long is fired straight through a board that is 10.0cm thick. The bullet strikes the board with a speed of 420 m/s and emerges with a speed of 280m/s. (a) What is the average acceleration of the bullet through the board? (b) What is the total time that the...

Hi..guys i have question again i guess you gone help me out here is the question 1. A bullet of mass 0.0016 kg moving at 535m/s impacts a large fixed block of wood and travel 5.9 cm before coming to rest. Assuming that the acceleration of the bullet is constant ,find the force exerted by...

Homework Statement A 7.00g bullet, when fired from a gun into a 1:00-kg block of wood held in a vise, penetrates the block to a depth of 8.00 cm. This block of wood is placed on a frictionless horizontal surface, and a second 7.00g bullet is fired from the gun into the block. To what...

a wooden tree trunk with A mass M=9.98kg is hung from a tree by a cord who's mass is irrelevant, it is hit by a bullet with a mass of m=0.02kg and is traveling at v1=500m/s. the bullet hits the trunk and immediately gets stuck in it, what is the maximum height that the trunk and the bullet in it...

Hello all, I'm new to this forum. I am currently writing a small piece of software to calculate a bullets flight path based on as many different factors as possible: Wind, Elevation, Beginning Velocity, Bullet's Rate of Twist, Bullet Weight, Air Density, etc., any other possible factor that...

what would be the speed of a bullet on decline fired from a pistol. firing angel is 45Deg. What would be the speed of bullet when it reaches 4 feet above from ground during its decline, i just need ratio of firing speed and speed before droping to ground.

Homework Statement A 0.0034kg bullet moves with a speed of 160 m/s perpendicular to the Earth's magnetic field of 5E-5 T. If the bullet has a net charge of 13.5E-9 C, by what distance is it deflected due to the magnetic field after it has traveled 1000m?Homework Equations radius = mv/qB theta...

Dear friends, If a bear's attacked by a: 1) Rubber bullet. 2) a lead bullet. Which'll be more effective in order to knock the bear down.I want to know how it's related to momentum phenomenon?I do know that lead bullet'll hit the bear down.Plz. reply in terms of momentum.Thanks.

Hello, First post guys, but I have a ongoing debate in need of a answer OK, I believe I deliver much more energy with a blow from my hammer then if I fired a bullet at the same object. especially since I am a 240lbs. muscle bound highly skilled carpenter using a 22oz. framing hammer. I...

1. A bullet is fired horizontally from the roof of a building 100. meteres tall with a speed of 850 meters per second. Neglecting air resistance, how far will the bullet drop in 3.00 seconds? 1) 29.4 m 2) 44.1 m 3) 100. m 4) 2,550 Since the horizontal speed should be constant throughout, so...

How can I calculate the force of a bullet shot against a wall if the velocity v and mass m are given?

Well hello there! :D I'm doing a project on graphical simulation of a bullet hitting a glass plate, and I have some describing the way the shards fly off upon impact. Note that in this calculation I am not yet taking the force of gravity or any forces other than the force of the impact of...

Homework Statement The muzzle velocity of a gun found at a crime scene is tested by firing the 100 g bullet into a block of mass 9.9 kg. The block is initially at rest on a frictional surface, coefficient of 0.1. The bullet sticks into the block and the combination slides a total distance...

[SOLVED] Firing a spherical bullet into a watertank I've got a problem, involving non-constant acceleration: If we fire a spherical bullet horizontally into a watertank, how far will the bullet traverse? I've figured as much that a spherical bullet provides a retarding force: F = -k...

I've got a problem, involving non-constant acceleration: If we fire a spherical bullet horizontally into a watertank, how far will the bullet traverse? I've figured as much that a spherical bullet provides a retarding force: F = -k \cdot v where k is a constant. This should provide...

Homework Statement An 9 g bullet is fired into a 2.5 kg pendulum bob which is initially at rest and becomes embedded in the bob. The pendulum then rises a vertical distance of 6cm. What was the initial speed of the bullet? What will be the kinetic energy of the pendulum when the pendulum...

1. Homework Statement A wooden block of mass M resting on a frictionless, horizontal surface is attached to a rigid rod of length L and of negligible mass. The rod is pivoted at the other end. A bullet of mass m traveling parallel to the horizontal surface and perpendicular to the rod with...

Hi all, One idle night a friend and I started an argument over the question: "How much energy is imparted on to a person if they a) were to be punched or b) getting hit by a bullet ?" The ultimate aim is to find out which imparts more energy, which has more force and also which has...

Homework Statement A 10g bullet moving at 300 m/s hits and passes through a 2.2 kg pendulum target. After impact the 1.2 m long pendulum rises up an angle of 15 degrees. Find the final speed (Vf) of the bullet. http://img233.imageshack.us/img233/7566/34494449gz4.png Homework Equations...

[SOLVED] Block- spring- bullet- harmonic motion... Homework Statement Your assignment is to make measurements of the muzzle velocity of a bullet. This measurig device consists of a 10kg block which rests on a horizontal surface of negligible mass and is attatched to a hooke's law spring...

Does Bernoulli's principle come into play, regarding the fact that a bullet my travel hundreds of yards and drop very little? Or is gravity pulling the bullet down at the same rate it would any other object, and it's just that the bullet is in the air for only a fraction of a second?

A bullet of mass m= 3.10×10-2kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.35kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.25m before stopping. Calculate the speed of the bullet just before it hits the...

Homework Statement When a gun fires a bullet why is the kinetic energy gained by the bullet much greater than the kinetic energy gained by the gun? Homework Equations Kinetic Energy = 1/2 m v^2 The Attempt at a Solution Ok I release that Kinetic Energy depends on the square of the...

Homework Statement A bullet of mass 0.03kg is fired from a gun with a horizontal velocity of 400 ms^-1. Find the momentum of the bullet after it is fired. If the gun is then brought to rest in 1.2s by a horizontal force which rises uniformly from zero to B N and then falls uniformly to...

Homework Statement A bullet traveling horizontally at a speed of 350 m/s hits a board perpendicular to the surface, passes through it, and it emerges on the other side at a speed of 210 m/s. If the board is 4 cm thick, how long does the bullet take to pass through it (in seconds)...

Hi, Could somebody please tell me what formula(s) to use to find the answer to the following problem? A bullet is fired from a gun at 300 m/s. It hits the ground 3s later. At what angle (in degrees) above the horizon was the bullet fired? (Assume no air resistance) Thank you in advance

[SOLVED] The speed of a bullet may be determined by allowing the bullet to pass throu Hello! I am new here and this is my first time posting...I am working on a physics problem and I have been stumped on it for a while now. Any hints would be greatly appreciated. Homework Statement The...

[SOLVED] Air resistance Homework Statement A bullet of mass m, diameter d, and muzzle velocity v0 is fired vertically upward from the ground. Assume that the drag can be expressed with Prandtl's air resistance forumla and that the drag coefficient, c, and air density, p, are constant. Find...

yeah, part c was for the block :) ahh..I thought I had the right answer originally but it didn't say if variables were supposed to be left in the problem, so I kind of doubted myself. Thanks for the help you guys. I am learng physixguru, maybe slowly, but learning. lol

Homework Statement A 4 kg block is suspended from a spring with k=500N/m. A .05kg bullet is fired from below into with a speed of 150m/s and comes to rest in the block. a.)Find the Amplitude of the resulting simple harmonic motion. b.)What fraction of the original KE of the bullet appears as...

Homework Statement A .22 rifle bullet, traveling at 350 m/s, strikes a block of soft wood, which it penetrates to a depth of 0.130 m. The block of wood is clamped in place and doesn't move. The mass of the bullet is 1.80 g. Assume a constant retarding force. How much time is required for the...

I'm trying to figure out how deep a column of water I would need to stop a .22 bullet. I'm interested in recovering bullets from a series of guns and trying to see those 'characteristic striations' each gun leaves as part of its 'fingerprint.' For what it's worth, Mythbusters tried to...

Homework Statement How fast would a 4.54g bullet have to be traveling so that it increased the temperature of 1.00 L of water by 1.30oC if it gave all of its kinetic energy to the water? Homework Equations i don't know what equation to use i have two of them but its seems they don't...

Physics HELP! Homework Statement A 2.00-g bullet hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.40-m long string. This causes the block to swing through an arc of 4.50. What was the speed of the bullet before it hit the block?Homework Equations The Attempt at a...

Hello, i have a few questions i am doing and am wondering if someone would be kind enough to check i am doing them correctly:rolleyes: First question is.. A shot is fired horizontally at a target 20m away and it is notice3d that the bullet hits a point 7.5cm below the target aimed at. What...