Bullet Definition and 650 Threads

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 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 the shaft. Theta...

This is a simple question. Since projectile has -g as the only y velocity component, does that mean if I were to shoot a gun with my arm fully exended and parallel to the ground, then the bullet would hit the ground within one second of firing the gun(assumming there was nothing in its way)...

A skeet is shot at 25.0 m/s [H 75 U], 2 seconds later the rifleman shoots, striking the target in .4s. What initial velocty of the bullet is needed for it to hit the skeet? I just need somone to confirm the answer I have. It's probably way off but I got 191 m/s [H 78 U] thanks.

Hi. I was trying to solve the following problems, but I just don't understand what principles/laws/concepts I'm supposed to be using. I hope someone can give me a hint as to where I should start. Thanks a lot for any replies. 31) Gayle runs at a speed of 4m/s and dives on a sled, initially...

A 5-g lead bullet traveling in 20 C air at 300m/s strikes a flat steel plate and stops. What is the final temp of the lead bullet? (Assume bullet retains all heat.) The melting point of lead is 327 C. The specific heat of lead is 0.128 J/g C. The heat of fusion of lead is 24.5 J/g. a. 227...

Imagine I were to shoots a .30 caliber rifle at a 0.56 kg block of wood. The rifle and wood are mounted on separate carts that sit atop an air track (like a linear air hockey table--ie. frictionless). The 6.4 kg rifle fires a 33 gram bullet at 219 m/s in the positive direction. What would be the...

A rifle is aimed horizontally at the centre of a large target 200m away. The initial speed of the bullet is 500 m/s. (a) Where does the bullet strike the target? (b) To hit the centre of the target, the barrel must be at an angle above the line of sight. Find the angle of elevation of the...

i have a question. you can call me stupid if you want but i need to confirm. i remember talking about an experiment in physics where if you shoot a bullet perfectly level from a gun and you just drop a bullet at the same time would both of the bullets hit the ground at the same time? i'd...

have a look at the diagram A physical system consists of wood block B and mass M. B is at rest on frictionless horizontal table. A small vertical wall W is place near one of the ends of B. The wall is fastened to B.A spring with spring constant k is attached to the wall and is connected tp a...

A 11-g bullet traveling at 208 m/s is fired into a 0.422 kg wooden block anchored to a 100N/m spring. If the speed of the bullet is not known but it is observed that the spring is compressed 53.1 cm, what was the speed of the bullet to the nearest m/s? Can someone help me out on where to get...

the question is http://home.earthlink.net/~urban-xrisis/clip002.jpg I got part A, but for part B I'm haveing trouble. http://home.earthlink.net/~suburban-xrisis/clip001.jpg my work for part B My book gives me an answer of \frac{M}{M+m} however my own answer is \frac{m}{M+m} where...

In police practice, bullets od identical mass are fired towards a concrete qall at different speed. It is found that a bullet traveling horizontally at 200m per second can penetrate the wall by a distance of 01.m. 1.In penetrating the wall, the kinetic energy of the bullet decreases. Account...

Hello,everyone I was thinking if electromagnetism could be used to deviate the path of an incoming bullet?

Ok, we were doing a lab yesterday in physics class, and we had to find the velocity of a bullet hitting a block with a hole in it's center, and is hung... when the bullet hit the block, it made a 18 degree angle... my teacher gave us a formula for finding the velocity of the block and we got the...

I don't know if you guys are fimiliar with this expiriment so I'll describe it first. Let's say that there's a plank(1km and at rest with respect to the plank) away, and I launch a bullet at the plank and 1,000km/sec, and exactly one second later, the bullet hits the plank. Now, the depth at...

so i heard that a galaxy was headed at us at like 100 times faster than a bullet. so what happens when it gets to us. Earth would be dead by then. mankind with it probably. but what happens to the galaxy?

I am doing a science project and need a few questions answered. I am trying to theoretically determine which caliber of bullet is capable of traveling the farthest. I've already assumed that the time each caliber of bullet spends in the air is going to be exactly the same. Therefore, I'm...

Hi, I really need help on the following questions and would appreciate it if someone could ASAP! Thank you! 1) a bullet of mass m is moving horizontally with speed v when it hits a block of mass 100m that is at rest on a horizontal frictionless table. The surface of the table is a height h...

ok, here's my problem, let's say you had a bullet and ignoring the physics of teh gun being shot(by this i meen the gunpowder explosion), what would happen if a string were tied to teh back of that bullet? would it slow it down considerably? would it effect where teh bullet goes? Just...

HELP Please! Ok, I am totally lost on how to solve this problem: A 5 g bullet moving at 600 m/s penetrates a tree trunk to a depth of 4 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...

Yesterday, one of my cousins asked me about Newton's third law. In this discussion he asked me this question: Why does not a bullet bounce back after striking the surface of glass as it does in the case of steel, considering that in both the cases the force with which it strikes the glass or...

A 4.2 g lead bullet moving at 260 m/s strikes a steel plate and stops. If all its kinetic energy is converted to thermal energy and none leaves the bullet, what is its temperature change? --- I don't even know what formula to use or how to start. I could get force, by multiplying the mass...

For some reason, I'm having trouble getting started on this problem: A bullet of mass m is fired from a gun of mass M. If the gun can recoil freely and the muzzle velocity of the bullet (velocity relative to the gun as it leaves the barrel) is v_{0}, show that the actual velocity of the...

A bullet of mass 0.0021 kg is shot into a wooden block of mass 0.197 kg. They rise to a final height of 0.546 m as shown. What was the initial speed (in m/s) of the bullet before it hit the block? I figured out this one I got another one A 5.0 kg ball is attached to a vertical...

I've been stuck on this problem forever and I don't know how to do it if you can't use r as the radius. A bullet is shot through two cardboard disks attached a distance D apart to a shaft turning with a rotational period T (see the attached picture). Derive a formula for the bullet speed v in...

Problem: A bullet of mass 0.018 kg and initial speed 300 m/s penetrates an initially stationary pop can of mass 0.055 kg and emerges with a speed 200 m/s. A) What is the initial momentum of the bullet and pop can system? I found this answer by 0.018 * 300 = 5.6 B) What is the...

If I shoot a bullet in the soft ground (meaning it doesn't bounce back), how is the momentum conserved? In that the entire Earth starts moving?

I am having difficulty understanding a basic idea about momentum. I already learned several different types of momentum problems but this one is confusing me. Thanks for your help in advance. "A 10 g bullet is fired into a 10 kg wood block that is at rest on a wood table. The block, with...

I'm having some difficulties with this problem, even though it seems easy. -----A bullet with a mass of 3.20 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 1.05 kg block, and embeds itself in a...

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. 1.) What force, in Newtons, does the wood exert on...

A 0.015 lb. bullet leaves the 23 in. barrel of a 0.30 caliber rifle (whose bore diameter is 0.30 in) at 2000 ft/s. Find the average pressure of the gases in the rifle barrel while the bullet is being accelerated.

Sorry for so many questions, just coming back here after going through all the review questions I could get. Here we go: A cowboy wants to open a saloon door with a revolver shot. The swinging door (Mass M, width b) is hit on the very edge and the bullet (Mass m, velocity v) lodges into the...

I was wondering me why a bullet is shoot spinning around it axis of symmetry. The cannon of the gun has usually small channels in spiral shaped, to exert a torque on the bullet in order it can rotate about it axis (i suppose). I've been thinking about this, and i heard that it has to do with...

Hi can anybody verify if I am using the correct formula, Here is the problem first, A bullet embeds itself in a pendulum bob, and the bullet+bob together swing up to some maximum height, which is easy to measure. IF the bullet has a mass of 15g, the bob's mass is 4kg, and the combination...

Hi, I'm doing a project where I need to find the velocity after penetrating a certain thickness of polycarbonate. What equations do I use to find this. Thanks

Hi! I would like to know what equation I would use to figure out this question and why? A 10-gram bullet is fired into a 3.0-kilograme block, given that the block a velocity of 30 cm/sec. With what velocity was the bullet fired? Thank you for your answer. [?]

if a bullet is shot up in the air will it return to the ground as fast as it was shot up or will air resistance slow it down enough to not cause as much damage?

My question is based on a stray bullet that was shot on new years, and we discovered the it had hit the surface of our tennis court with such force that it made a hole aprox. the same size as the bullet it's self. A group of friends discussed different opinions as to how fast the bullet comes...

A 5.5 g bullet is fired into a block of wood with a mass of 22.6g. The wood block is intially at rest on a 1.5m tall post. After the collision, the wood block and bullet land 2.5m from the base of the post. Find the initial speed of the bullet.

I need help with this. I don't know what equation to use. A 5.5g bullet is fired into a block of wood w/a mass of 22.6g. the wood block is initially at rest on a 1.5m tall post. after the collision, the wood block and bullet land 2.5m from the base of the post. how do you find the initial...

Bullet speed- Please Help! I am not to great at physics and I was hoping someone could point me where I am going wrong in this problem! :) My answer I came up with is 2.5 m/s but that isn't one of my options so I know something has to be off. 5. To find the speed with which a gun fires...

:smile: A 5.5 gram bullet is fired into a block of wood with a mass of 22.6 grams. The wood block is initially at rest on a 1.5 meter tall post. After the collision, the wood block and the bullet land 2.5 meters from the base of the post. Find the initial speed of the bullet.

A 5.5 gram bullet is fired into a block of wood with a mass of 22.6 grams. The wood block is initially at rest on a 1.5 meter tall post. After the collision the wood block and the bullet land 2.5 meters away from the base of the post. Find the initial speed of the bullet. (After collision the...

If a bullet exits a barrel at 3000fps. Does the breaking of the sound barrier by the bullet influence the BOOM that you hear. Thank you.

Lets say you take a 30 gram bullet and fire it out of a barrel that gives the bullet a linear velocity of 86.6% of c with no angular velocity. Now it's mass would be 60 grams. Next you accelerate the bullet angularly while it is in motion,with a force that in no way affects the bullet's...

A 50-g bullet is shot into the 2-kg can of a ballistic pendulum. The can rises to a height of 1.3m Determine the speed of the bullet just before the collision. Don't know how to begin.

hey ppl A 4.0 kg block is suspended from a spring with a force constant of 500 N/m. A 50g bullet is fired into the block from directly below with a speed of 150 m/s and is imbedded in the block. So basically... there are 3 sections here. A. bullet is traveling up and hasn't touched the...

If we shoot bullet to the air (90Degree) it will fall down to same spot or not ? (Without anther force) Thanks

these questions are challange questions from our teacher (MIT grad) who gave us these knowing that they were a bit out of reach for us as we are a beginning intro physics class(HS). we haven't but scratched the surface on these topics. so we're trying to find/acquire at least a basic, rough...

A bullet with a mass of 4.90 g and a speed of 609 m/s penetrates a tree to a depth of 4.07 cm. Assuming that the frictional force is constant, determine how much time elapsed between the moment the bullet entered the tree and the moment it stopped. I thought I could use the equation time =...