Bullet Definition and 644 Threads

Homework Statement A gangster fires a bullet (m1 = 30 g, v1 = 190 m/s) at Stupendous Man (m2 = 31 kg), but it simply bounces away elastically. If Stupendous man was standing on a frictionless surface, what is the change in speed of the bullet after striking stupendous man? Be careful with...

The problem is: "A 0.00600-kg bullet traveling horizontally with a speed of 1.00*103 m/s enters an 19.2-kg door, imbedding itself 8.60 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. (a) Before it hits the...

Homework Statement A man, mass M, stands on a massless rod which is free to rotate about its center in the horizontal plane. The man has a gun (massless) with one bullet, mass m. He shoots the bullet with velocity Vb, horizontally. Find the angular velocity of the man as a function of the angle...

when a bullet is traveling at great speeds, how will be the frictional and drag forces on the bullet while considering it spinning and then non-spinning. to my knowledge i feel that spinning bullet shows less drag and friction than non-spinning, as we know that the rolling friction is always...

A uniform thin rod of length 0.500 m and mass 4.0 kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 3.0 g bullet traveling in the rotation plane is fired into one end of the rod. As viewed from above, the bullet's path makes angle θ = 60°...

I am trying to find the amount of ice that melts when a lead bullet traveling at 240 m/s at 30 °C. This textbook claims I should use the formula \dfrac{1}{2} m v^2 + m_{bullet} c_{bullet} \left|\Delta \right| T = L_f \Delta m What I don't understand is why I shouldn't first calculate how...

I'm developing a 2 Dimensional iOS war game, so think guns bullets damage hit points etc. I'm trying to write a function that calculates the Velocity of a bullet at a certain distance, so that I can calculate the force of the bullet at a certain distance. So let's say the that Rifle A is...

Homework Statement A man aims his gun vertically and shoots a 0.245 kg target, which is positioned on a telephone pole. The bullet has a mass of 0.055 kg and is traveling at a velocity of 850 m/s upwards just before it hits the target. The bullet passes through the target, emerging with a...

I'm proving that the force of a bullet is not actually enough to send a person flying backwards like you see in the movies. These are the variables I have so far. I'm not sure if all of them are really necessary to solve this. distance between gun and person getting shot = 2.45 m mass...

Homework Statement A bullet collides and embeds itself into a block hanging from a rope. The block and embedded bullet swing out to an angle of 10 degrees. If the bullet plows 2 cm into the block before stopping, what is the coefficient of kinetic friction between the block and the bullet...

Homework Statement a 50 g bullet hits and becomes embedded in a wooden block of as 450 g which is at rest on a surface (μ = 0.41) and is attached to a spring bumper. The block and bullet compress the spring bumper a distance of 20 cm. Is the spring constant is 250 N/m find initial speed of...

In Fig. 9-58a, a 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.20 kg) and embeds itself in block 2 (mass 1.80 kg). The blocks end up with speeds v1 = 0.630 m/s and v2 = 1.40 m/s (Fig. 9-58b). Neglecting the material...

Homework Statement Need help on question f. Homework Equations 1)KE = 1/2 mv2 2)PE = mgy 3)Wnet = KE + PE 4)W = Fdcosθ 5)Vf2= Vo2 + 2a(X-Xo) 6) F= ma The Attempt at a Solution A) Equation 1 = 4563J B) Equation 3 = 4563.10584J C) Equation 4 = 0 E) Equation 5 for...

Homework Statement A ball of mass m which is projected with speed vi into the barrel of a spring-gun of mass M initially at rest on a frictionless surface, as shown in the attached file below. The ball sticks in the barrel at the point of maximum compression of the spring. No energy is lost...

Homework Statement A 25 g bullet is fired at 150 m/s into a 2.0 kg block of wood hanging from a string 3.0 m long. The bullet becomes embedded in the block. To what height do the bullet and block swing? Homework Equations m1v1 = (m1+m2)vf 1/2 mv^2 = mgh The Attempt at a Solution...

Homework Statement What is the average force applied by a 75 g bullet that leaves a gun at 1350 m/s and hits a target 75m from the barrel of the gun? Homework Equations F = ma The Attempt at a Solution First I had the equation F = ma, and began filling in all the variables I could...

I shoot a bullet of mass m with velocity v against a block of mass M. Find how far the bullet penetrates the block. This problem turned up in my friends examination and I believe it can't be done without the coefficient of friction. Am I right or can this be calculated using conservation of...

Homework Statement The initial kinetic energy imparted to a 0.0190 kg bullet is 1008 J. (a) Assuming it accelerated down a 1.00 m long rifle barrel, estimate the average power delivered to it during the firing. (b) Neglecting air resistance, find the range of this projectile when it is...

Homework Statement A bullet with a mass of 4g flies horizontally and collides with a ball of 3kg which is hanging down attached to a hawser with the length of 2m. What was the bullet's speed before the collision if the hawser tilts 15 degrees away from its original position Homework...

Homework Statement If a 30 g bullet is shot with a velocity of +300 m/s from a 7.5 kg gun, what is the recoil velocity of the gun? m1 = 0.03 kg v1 = 300 m/s m2 = 7.5 kg Velocity initial for both objects is 0.0 m/s Homework Equations (m1 + m2)(v) = (m1v1) + (m2v2) The Attempt...

Ok so I'm trying to show how a bullet in real life will not actually make a person fly backwards like it does in movies. I have some idea of how to go about this but need help. So far... I know it's a perfectly inelastic collision since the bullet sticks into the person so would I have to use...

Homework Statement A 95-g bullet is fired from a rifle having a barrel 0.540 m long. Choose the origin to be at the location where the bullet begins to move. Then the force (in Newtons) exerted by the expanding gas on the bullet is 16200 + 9400x - 23750x2, where x is in meters. (a) Determine...

Hi, I am new to this forum, so please go easy on me. I wonder about this... You are traveling in a train at the constant speed of 100 mph. Imagine that you throw a small ball at the speed let say 40 mph. So ground speed of this flying ball is 140 mph (as you already travel at 100mph +...

No, not the ferrous metal ones that magnets stick to. My question pertains to what would happen if you shot a neodymium magnet out of a shotgun. I've see a video where they do it and they stick together but what about their effects on electronics? If you hit it and they didn't penetrate...

Homework Statement A rifle bullet with a mass of 15.5 g traveling toward the right at 262 m/s strikes a large bag of sand and penetrates it to a depth of 24.2 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet. Homework Equations F⃗...

1. The muzzle speed for a Lee-Enfield rifle is 630 meters per second. Suppose you fire this rifle at a target 700 meters away and at the same level as the rifle. a - In order to hit the target, you must aim the barrel at a point above the target. How many meters above the target must you aim...

Hi guys, i was wondering how you calculate how fast a bullet would have to travel to 'overcome' gravity, i.e if it didn't hit anything (and discluding air resistance for now). Mapping the Earth as a circle and knowing things such as the radius of the Earth and gravity acts on the bullet at...

Hello, can you can tell me if this is correct? I thought the height would turn out close to where satellites orbit, but it comes out to about 5.5 million miles away! I was very surprised by this, that's about 20 times further than the moon. Here's what I used Escape velocity: Ve = sqrt(2GM/r)...

Ignoring whether or not the gun would be able to fire in space, what would happen if a bullet was shot, traveling 2,000 mph into space from 62 miles above the earth? How far would it go?

Homework Statement A bullet with 5 g of mass and a velocity of 100m/s goes through a disk that was rested initially the disk is solid and as a radius r=20cm. It's 2cm thick and as a 2kg mass that can spin with no friction in an axis that goes through the center. The bullet goes trough the...

Homework Statement So I have a block that has had a bullet shot through it at an initial speed of 280m/s. It is 0.03kg and after it leaves the block it is traveling at 190m/s. The block is a length of 0.012m and weighs 1.50kg. What is the average force exerted on the block? Homework...

Homework Statement A bullet with mass and speed v hits a wooden block of mass M that is situated at rest on a frictionless surface. It penetrates the block and gets trapped inside it as a result of a constant retardation force F_{ret} that opposes relative motion between the two objects...

Aim: To understand the physics(equations) behind this problem. On the channel 'Discovery Science',a the show-presenter was testing guns.In one of the tests,he fires the gun at a certain distance from a 'BALLISTIC GELATIN'(just a jelly of high viscosity to simulate swine muscle tissue). The he...

Homework Statement Hello! I'm trying to solve this exercise: A bullet with initial velocity v and mass m pass through a block of mass M in a pendulum of length L and leave the block with velocity v/2. Which value of v will make the pendulum describe a circumference? As you can see, English is...

Here is an interesting puzzle from Steve Landsburg's excellent blog: http://www.thebigquestions.com/2012/05/22/tuesday-puzzle/ "You’re in a rectangular room. Elsewhere in the room is a man with a gun, who shoots a bullet in a random direction. The bullet careens around the room, bouncing off...

I'm working on setting up an experiment to test, calculate and compare the "stopping power" of various defensive handgun loads. This experiment assumes that "stopping power" is some sort of calculation like "power"/penetration distance, meaning that the higher the "power" and shorter the...

Homework Statement A 30g bullet is moving at a horizontal velocity of 500m/s come to a stop 12 cm within a solid wall. What is the change in mechanical energy of the bullet? Homework Equations Mechanical energy = 1/2mv^2+mgh The Attempt at a Solution The question is for 6...

Homework Statement http://img403.imageshack.us/img403/1751/problem1r.jpg Homework Equations v_f = \frac{m v_1 + M v_2}{m+M} The Attempt at a Solution Let "A" be the configuration immediately before the collision and "B" the configuration immediately after the collision, and "C" the very...

Homework Statement I can't figure this one out. I can't use any of Newtons laws to solve this, kinetic formulas, and w=Em+Ek doesn't seem to be working for energy. I know the answer, but I can't solve it. kg = kilogram m/s = meters per second m = meter A 0.002kg bullet is traveling at...

How we differentiate the amount of Energy of a bullet fired by a gun and a rifle with same linear velocity? do they posses the same energy ? or rifle has more energy than gun.

Homework Statement The wheel shown in the sketch below, is comprised of two 50.0 cm long thin rods of negligible mass and a thin metal ring with a mass of 10.00 kg, mounted on a very low friction bearing. A 100 gram lead weight is shot horizontally at the stationary wheel with an initial...

A wooden block of mass M = 1.83 kg is rest on a frictionless, horizontal table attached to the end of an unstretched spring (k = 217 N/m). A bullet of mass m = 8.02 g is fired horizontally into the block at speed vo = 394 m/s. The bullet comes to rest inside the block, and causes the mass to...

Homework Statement A rocket passes the Earth at 0.8c. As it goes by, it launches a projectile at 0.6c perpendicular to the direction of motion. What is the projectile's speed in the Earth's reference frame? Homework Equations [;u=\frac{u'+v}{1+u'v/{c}^{2}};] The Attempt at a Solution Since...

So I've been working on this problem for a while and can't seem to come up with anything and I don't really understand why I'm wrong in what I did. I could just get the answer online, but I actually want to understand what's happening. Homework Statement A rifle bullet with mass 8.12g and...

Homework Statement A bullet of mass "m" is fired from a cannon located at the origin. The shell moves in the yz plane, where "z" is the vertical coordinate, with an initial velocity of magnitude "v0" at an angle θ above the y-axis. A) What is the torque on the shell, about the origin, as a...

In the bullet cluster, a large quantity of matter in the form of gas has been removed from two galaxies as a result of them passing through each other. What I'm wondering is, how do we know that such gas constitutes a significant portion of the gravity a galaxy would exert? I know that gravity...

Homework Statement A 10g bullet moving at 300.m/s hits and passes through a 2.20kg pendulum target. After the impact, the 1.20m long pendulum rises up to an angle of 15 degree, find the final speed of the bullet. Homework Equations Ek= 1/2MV^2 Ep= MGH Momentum = MV The Attempt at a...

Homework Statement A 30.0-kg gun is standing on a frictionless surface. The gun fires a 50.0-g bullet with a muzzle velocity of 310 m/s. a) calculate the momenta of the bullet and the gun after the fun was fired. b) calculate the kinetic energy of both the bullet and the gun just after...

A bullet of mass m = 19.7 g traveling horizontally at speed vo = 445 m/s strikes a block of mass M = 854 g sitting on a frictionless, horizontal table. The bullet comes out the other side of the block at speed v = 415 m/s. What is the speed of the block after the bullet exits the block? Using...

Homework Statement A small wooden block with mass 0.750 kg is suspended from the lower end of a light cord that is 1.48m long. The block is initially at rest. A bullet with mass 0.0118kg is fired at the block with a horizontal velocity V0. The bullet strikes the block and becomes embedded...