Bullet Definition and 645 Threads

A 2.0-kg pistol fires a 1.0-kg bullet with a muzzle speed of 1000 m/s. The bullet then strikes a 10-kg wooden block resting on a horizontal frictionless surface. The block and the embedded bullet then slide across the surface. A) what is the kinetic energy of the bullet as it travels toward the...

A 0.0125 kg bullet strikes a 0.300-kg block attached to a fixed horizontal spring whose spring constant is 2.25 x 103 N/m and sets it into vibration with an amplitude of 12.4 cm. What was the speed of the bullet if the two objects move together after impact? E=(1/2)kA^2=(1/2)(2250 N/m)(0.124...

[Solved] Thrown up ... I am stupid when it comes to Physics so please guide me :). I have 2 questions on a worksheet I got today and I am stuck. Is it b? .. (30 m/s) / 9.8 m/s^2 = 3.06s ... 30 x 1/2(3.06) = 46m? Is it b? .. Vi = Vf - a*1/2(t) ... Vi = 0, Vf = 0, a = 9.8, t = 1/2(10) = 5 ...

The question is "A 2 kg block initially hangs at rest at the end of two 1-meter strings of negligible mass. A .003 kg bullet, moving horizontally with a speed of 1000 meters per second, strikes the block and becomes embedded in it. After the collision, the bullet/block combination swings upward...

A forensic expert needed to find the velocity of a bullet fired from a gun inorder to predict the trajectory of a bullet. He fired a 5.50g bullet into ballistic pendulum with a bob that had a mass 1.75 kg. The pendulum swung to a height of 12.5 cm above its rest position before dropping back...

I have a physics problem and are woundering if someone can please help me!o:) Here's the problem: A bullet of mass 20 g strikes a fixed block of wood at a speed of 320 m/s. The bullet embeds itself in the block of wood, penetrating to a depth of 6.0 cm. Calculate the average net force acting...

There is a gun in which the barrel length is 62cm and has a muzzle velocity of 450m/s. A wooden chair of 30 kg sits on a wooden floor. A bullet penetrates the chair and the bullet lodges itself into the chair 9 centimeters. How far back, in centimeters, did the chair fly back? The...

I was told something I really found hard to believe. Two cases: A) You drop a guns bullet from a height of let's say 1 meter. B) You fire the bullet from the gun horizontaly, also 1 meter above ground. What I'm told is that these two bullets will hit the ground at the same time if...

okay my question is kinda stupid, and i know i totally sux at physics. if a bullet is shot upwards, will it fall at an equal or greater force? i know its decelerating as it is shot up, and it would be acclerating as it falls, and so wouldn't it fall at a greater force?

http://blog.360.yahoo.com/blog-rkirjZg1crSQi6eQnmqL4njg_w--?cq=1 Please try to solve this problem. Thanks.

A bullet of mass m hits a disc of radius R on its periphery at speed v.What will be the velocity of disc if the collision is inelastic?

A 0.01-kg bullet traveling horizontally at 400.1 m/s strikes a 4.2-kg block of wood sitting at the edge of a table. The bullet is lodged into the wood. If the table height is 1.3 m, how far from the table does the block hit the floor? I have calculated the final velocity of the bullet and...

A 135 g bullet is fired from a rifle having a barrel 0.590 m long. Assuming the origin is placed where the bullet begins to move, the force (in Newtons) exerted by the expanding gas on the bullet is 20000 + 8000x - 22000x2, where x is in meters. (a) Determine the work done by the gas on the...

I can't figure out if I set this problem up correctly. Any help? The muzzle speed of a 22-caliber bullet fired from a rifle is 360 m/s. If there were no air resistance, how high would this bullet rise when fired straight up? v^2=intial v^2+2ay y=v^2-initial v^2/2a=(0-(360 m/s)^2)/2(-9.80...

A 4.5 g bullet leaves the muzzle of a rifle with a speed of 318 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.75 m long barrel of the rifle? The answer is in Newtons. Thanks for any input :)

A 10 gram bullet with a horizontal speed of 400m/s hits a block of wood and penetrates 12 cm. a. what is the frictional force? b.how long does it take the bullet to come to rest I have the answers but cannot figure out how to get there. I set my initial velocity to 400 m./s, making my...

Ok, so here's my question: 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. I know this has already...

anyone have any ideas how I could design a science fair project around bullet physics? I was leaning toward muzzle velocity and bullet speed. also the power the different calibre's of bullets have on impact but I am not sure how to design the experiment or measure results any help would be...

Ok, I'm using Schaum's Outline of College Physics to supplement my ultra condensed correspondance physics course. As I work through the "Supplementary Problems" I've come across this one which leaves me puzzled. Typically a bullet leaves a standard 45 caliber pistol (5.0 inch barrel) at a speed...

A bullet with a mass of 6.00 g is fired through a 1.25 kg block of wood on a frictionless surface. The initial speed of the bullet is 896 m/s, and the speed of the bullet after it exits the block is 435 m/s. At what speed does the block move after the bullet passes through it? For this one...

A 8.0g bullet traveling at 400m/s passes through a heavy block of wood in 4.0x10^-4s, emerging with a velocity of 100m/s. Ignore the motion of the wood. 1) What is the force exerted by the block on the bullet? 2) What is the force exerted by tbe bullet on the block? 3) How thick is the...

ok here's the thing. i fire a bullet at velocity (let's say static velocity, no acceleration) of 500m per sec. let's say that bullet's mass is 5g. what is the formula of its fallout? i mean if i fire the bullet at height 2m straight forward, at what height would it be at 1000m after fired?

Can someone please help me solve this?? A 5 gram bullet traveling in 20 0C air at 300 m/s strikes a flat steel plate and stops. What is the final temperature of the lead bullet?(Assume all heat is retained by the bullet. The melting point of lead is 327 0C. The specific heat of lead is...

I'm doing this without a teacher, so this isn't really a homework question, but this still seemed the most appropriate forum. I have the following question: A square board, of side 2a and mass M, is to be used to estimate the speed of bullets. It is freely hinged about one horizontal edge...

Ok guys, I'm stuck on this question I was wondering if you could help me out. Its actually in 2 parts (2nd part harder than 1st part). 1st part: At what height will a bullet reach if fired at 1000mph straight up (excluding all other forces except gravity) 2nd part: At what angle would a...

So I was curious as to how far a high velocity bullet would travel if fired at a 45 deg angle. I used the muzzle velocity for a .306 150 g bullet which is 2700 fps or 822.9 m/s. I only calculated this for zero air resitance because I quite honestly don't know how to calculate for air...

I am not quite sure how to start 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 is v. Show that the actual velocity of the bullet relative to the ground is v/(1+b) and the recoil velocity from the gun is...

Me and my friends were arguing if a bullet can push a person back. I'm the only one that thinks it won't push a person back even if it doesn't go through simply because the force is not big enough to push a person back. Also, say a person was coated with a layer of diamonds, and was shot in...

I have a problem where a 20 gram bullet is fired at 1200m/s throguh a 45 gram block and emerges at 900m/s. I am asked to find the time that the bullet took to pass through the block which leads into a follow-on question about finding total force applied. I do not even know how to approach...

Q) A 3 g bullet traveling at a speed of 400m/s enters a tree and exits the other side with a speed of 200 m/s. Where did the bullet's lost KE go, and what was the energy transferred? This is an example prob from my book which says: Change in KE+Change in Internal Energy=0 Hence, Change in...

Given: latent heat of fusion of water is 333000 J/kg. A 3.37 g lead bullet at 27 degrees C is fired at a speed of 272 m/s into a large block of ice at 0 degrees C, in which it embeds itself. What quantity of ice melts? Assume the specific heat of lead is 128 J/kg x C. Answer in units of g...

A bullet is fired straight up with a muzzle velocity of 460 m/s. how long will it take it to reach its highest point and how high will that be? (The air resistance may be neglected) i've been busting my brain over this question for almost an hour, and i just can't find a formula that will...

a .005 kg bullet with and initial speed of 400 m/s is fired through a 1 kg block. The block is at rest on a frictionless, horizontal surface, is connected to a spring of force constant 900N/m. If the block moves .05m to the right after impact. Find (a) the speed at which the bullet emerges from...

please help me FRICTION A 8.1g bullet leaves the muzzle of a rifle with a speed of 605.8m/s. What constant force is exerted on the bullet while it is traveling down the0.5m lengthof the barrel of the rifle? answer in N. Thanks in advance!

a rifle fires a(n) 6g bullet with a muzzle velocity of 390m/s into a block of wood. the bullet comes to rest after it has made a(n) 18cm deep hole in the wood. what is the magnitude of the average frictional force slowed the bullet? can i use this formula? J=FT=pf-pi=mv

A(n) 6g bullet is fired into a 253g block that is initially at rest at the edge of a frictionless table of height 2m. the bullet remains in the block, and after impact the block lands 2.1m from the bottom of the table. g=9.8m/s^2. find the initial speed of the bullet all in know is...

I’m trying to help put the energies of particle accelerators say the Fermilab Tevatron accelerator into layman’s perspective. Now if we were to scale up the energy put into say a proton and scale that up to a 22 caliber bullet, how much more energy would it require? Also put you answer in...

A bullet, 10g, hits a pendulum, 2kg. The center of mass of the pendulum rises a vertical distance of 12cm. Assuming the bullet embeds itself in the pendulum, calculate the bullet's initial speed. What I did was assume that at 12cm vertical distance the pendulum and bullet are momentarily at...

Hey, I have been set this question and thought I'd solved it correctly but it turns out I got the answers wrong... A 5.50 g bullet is fired horizontally at two blocks at rest on a frictionless tabletop. The bullet passes through the first block, with mass 1.20 kg, and embeds itself in the...

I'm having trouble with this physics problem: A bullet traveling horizontally with a velocity of magnitude 400 m/s, is fired into wooden block with mass 0.800 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...

so a bullet of mass m is fired into a blockof mass M sitting on a frictionless table. In the first case the block has a wall directly behind it. The bullet travels a distance D into the block Now the bullet is fired again but the wall is removed, how far will the bullet travel now when the...

A bullet of mass m= 0.0260 kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.30 kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.20 m before stopping. Calculate the speed of the bullet just before it hits the...

I've been trying to figure this out for a while and it's due tomorrow...any help would be greatly appreciated. A .005 kg bullet is fired into a 4.0 kg pendulum bob initially at rest and becomes embedded in it. If the pendulum rises a vertical distance of 5.0 cm, calculate the initial speed of...

I've just read the forum rule and fount out this is not the right place to ask school related question +_+ I'd really appreciate if any of moderators can move this question to the right h/w forum. Thank you. This is solved. Thank you Regards,

bullet enters a wall with speed v1 and goes out with speed v2, the wall is h units thick. During that time it experiences an impending force which is proprtional to v^2. I have to find the time the bullet goes out the wall. I can take t0=0 v0=v1 x0=0 Using N2 law i get d(mv)/dt =...

An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height (Fig. P6.30). The bullet remains in the block, and after the impact the block lands d = 1.5 m from the bottom of the table. Determine the initial speed of the bullet. this is what...

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...