Collisions Definition and 693 Threads

I am constructing a linear particle accelerator and have come into a problem, I need a materiel that when a electron hits it the electron breaks apart in smaller particles and the materiel breaks apart (on the subatomic level of course) as little as possible and make a little exes radiation as...

I am trying to calculate differential cross-section for partonic collisions (QCD) like q + q \rightarrow q +q q + \bar{q}\rightarrow q + q g + g \rightarrow g + g I can't find those calculations done anywhere, just the results and maybe some middle tips, that's all. As you may know those...

Homework Statement A diesel engine weighs 8 times as much as a freight car. This diesel engine, moving on a horizontal track at 3 km/h, crashes into the freight car (which was moving at 2 km/h in the same direction). What is the velocity, in km/h, of the now linked together engine/car...

Homework Statement A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path, determine a. the speed of the first ball after the collision. b. the speed and direction of the second...

Hello. I want to play around with the process of one photon splitting into more lower energy photons and vice versa. As I understand it one can quite easily make a Feynman diagram of a photon splitting into two lower energy photons by interacting with virtual electron/positrons. And also the...

Homework Statement [/B] Two rocks collide in outer space. Before the collision, one rock had mass 14 kg and velocity ‹4450, −2950, 2250› m/s. The other rock had mass 7 kg and velocity ‹−600, 1900,3600› m/s. A 1 kg chunk of the first rock breaks off and sticks to the second rock. After the...

Homework Statement a ball of mass 0.1 kg, is free falling from the height (h1) of 1 m. hits the ground with a k = 0.5. ##k=\frac{v_2}{v_1}## A)Height that the ball will reach after the hit. B)The heat quantity released by collision Homework Equations I think ##mgh## and ## \frac{mv^2} {2} ##...

2 semi-related questions: 1)If momentum is conserved in a system of 2 objects colliding and we are aware of their masses and initial velocities, let's say object 1 is moving at a certain velocity towards object 2 at rest, is there any way to solve for their final velocities without knowing one...

Homework Statement Ball A with velocity +3.00 m/s collides with ball B with equal mass traveling at -2.00 m/s. What is the velocity of each ball after the collision. Homework Equations Not sure. The Attempt at a Solution I know that momentum is conserved because, but solving the conservation...

Hello, I recently posted a few conceptual questions regarding conservation of momentum. I'm processing the information more easily now, but I've hit yet another bump in the road. I've learned that in an inelastic collision in which "velocity is the same before and after the collision" the...

A particle with mass m is at rest. A second one, identical to the last one hits the first one. Show that in the case of a perfectly elastic collision (Q=0) the directions of the two particles make a right angle. You can't assume that both final velocities will be equal. Here's what I've got...

I was looking up elastic and inelastic collisions and found that and elastic collision is a collision where kinetic energy isn't lost to other forms of energy or heat while an inelastic collision is just the opposite. In physics class we were taught that an elastic collision was a collision of...

Homework Statement Three balls of masses m1, m2 and m3 are suspended in a horizontal line by light wires and are almost touching. The mass m1 is given a horizontal velocity v so that it collides head-on with the mass m2. Find an expression for the final kinetic energy of m3? What value of m2...

I don't understand how momentum is conserved during inelastic collision...please help me out with some relevant and practical examples...thanks

Homework Statement Consider a hash table with ##n## buckets, where external (overflow) chaining is used to resolve collisions. The hash function is such that the probability that a key value is hashed to a particular bucket is ##\frac{1}{n}##. The hash table is initially empty and ##K##...

Does someone else remember a program made to simulate the potential outcome of the collisions of celestial objects?

Homework Statement A baseball with a mass of 0.152 kg is moving horizontally at 32.0 m/s [E], when it is struck by a bat for 0.00200 seconds. The velocity of the ball just after the collision is 52.0 m/s [W 20⁰ n]. a) Find the impulse experienced by the ball? b) Find the average net force of...

Consider a particle with velocity "v" has the collision with a rotating disc. How can I analyze the final angular velocity this system? If the mass of particle is very negligible related to the mass of rotating disc, definitely particle will turn back after collision. In this case, how can I...

Homework Statement In a collision between two unequal masses, how does the impulse imparted to the smaller mass by the larger mass compare with the impulse imparted to the larger mass by the smaller one? A) They are equal. B) It is larger. C) It is smaller. D) The answer depends on the ratio of...

Homework Statement Two pucks of equal masses collide in a non-head-on collision. Puck 1 with a velocitiy ##u_1 = 2.50\ m/s## impacts puck 2 at rest, in a 28-degree angle. Assuming no friction between the pucks, find their final velocities. Data: ##m_1 = 5.00\ kg## ##u_1 = 2.50\ m/s##...

So, I had to complete this chart for an assignment in class regarding momentum and possible situations that could result from a collision between two objects. For the outcomes or results column of the chart there are 11 different blanks (impossible or possible) that could possibly occur and I...

I thought that when positrons and electrons collide they annihilate straight away, giving up energy in forms of photons and other particles. However, I'm reading through some notes and they suggest that the positron loses energy rapidily in collisions with electrons but does not annihilate until...

In the Fast and Furious 6 when Dom jumps off of his car across the bridge to collide with letty and push her across the bridge to save her. In terms of physics, would this be possible and how fast would he have to be traveling in order for him to have enough force to push her across the bridge...

Homework Statement I have a practice question in front of me, with the answer and the steps to reach it but I am having a tough go trying to figure out how to do the steps myself. Can someone please clarify the outlined area of the following question? In a crash, test car A, was initially...

Homework Statement A block of mass m lying on a rough horizontal surface is given an initial velocity of v_0. After traveling a distance d, it makes a head-on elastic collision with a block of mass 2m. How far does the second block move before coming to rest? (Assume that the coefficient of...

Now I know that in the general Schwarzschild metric, there is energy and angular momentum conservation, but what I'm wondering is if there is any linear momentum conservation. Let's say a particle collides with a black hole. Does the energy of that particle go solely to the rest mass and...

Homework Statement A 2000-kg truck is sitting at rest (in neutral) when it is rear-ended by a 1000-kg car going 28m/s .After the collision, the two vehicles stick together. #1What is the final speed of the car-truck combination? #2What is the kinetic energy of the two-vehicle system before the...

Homework Statement Mass 1 (M1=1 kg) slides on a frictionless surface at v0=1 m/s toward a mass (M2=2 kg) with a spring bumper of force constant k = 20 N/m. The two move together at vf at the instant that the spring is compressed to its maximum x. Find the loss in kinetic energy (KEi-KEf). I...

Homework Statement Suppose that a certain accelerator can give protons a kinetic energy of 200 GeV. The rest mass of a proton is 0.938 Gev/c^2. Calculate the largest possible rest mass M0 of a particle that could be produced by the impact of one of the high-energy protons on a stationary...

Homework Statement Two objects of equal mass traveling toward each other with equal speeds undergo a head on collision. Which one of the following statements concerning their velocities after the collision is necessarily true? (a) They will exchange velocities. (d) Their velocities will...

Homework Statement Homework Equations p=mv[/B]The Attempt at a Solution My thoughts- Answer is C as KE is not conserved since velocity of ball has decreased. Option A also seems correct.[/B]

I have an interesting problem. I am involved in a historical fencing group which uses blunted swords to thrust with (think fencing foils and épées, but heavier and stiffer, with a rubber blunt on the end). We've been discussing various new weapons and needed to address safety. I decided to...

In "Our Mathematical Universe" by Max Tegmark, in the footnote at p. 208, Tegmark writes "..the well known fact that things are more likely to bump into each other when you lower the temperature, just as slow neutrons are more likely than fast ones to strike targets in a nuclear reactor" Is...

ok, so as i understand an elastic collision conserves energy, and an inelastic collision doesn't conserve energy. also that the energy loss in inelastic collisions is due to the fact that energy is required to "squash" or deform the object. ok, maybe its just the terminology(it probably is)...

The only force really considered in classical mechanics is gravity. And yet, we often have problems involving collisions and friction, which are intrinsically electrical phenomena, and thus outside the scope of classical mechanics. We have laws such as conservation of momentum which is used for...

I learned that Pauli principle says two fermions cannot be same place than how we can collide two protons actually its also impossible (for me) to show this in feymann diagram.I want to know how its possible. Thanks

Homework Statement Inscribe N chords of equal length within a circle of radius r. A body of mass m travels at constant speed v along the chords and is perfectly reflected in each collision with the circle (there is no momentum change tangent to the circle). Show that the radial momentum change...

Homework Statement A cubical box of mass 10 kg with edge length 5 m is free to move on a frictionless horizontal surface. Inside is a small block of mass 2 kg, which moves without friction inside the box. At time t = 0, the block is moving with velocity 5 m/s directly towards one of the...

When a proton collides with a proton say at the LHC, is vacuum field theory used? It seems like you shouldn't have to include temperature effects since there are only two particles. But then again, all experiments take place at finite temperature, the ambient temperature of the room? When a...

I learned that momentum conservation is vectorial, and now, when i read about perfect elastic collisions, I can't understand why they use a scalar conservation. I tryed to use vectorial coervation to see the diference and it's true: it's needed a scalar conservation. But why?

Ball A, a 0.055 kg ball, moving with a speed of 2.50 m/s collides head-on with ball B, a 0.095 kg ball initially moving away from it at a speed of 1.15 m/s. Assume a perfectly elastic collision. Take the initial velocity of ball A to be in the positive x direction. (A) What is the speed of...

Three blocks (1,2,3) of mass 3.00 kg, 2.00 kg, 1.00 kg sit linearly 10.0 cm apart from each other on a frictionless surface. A 25 g bullet is shot at the first block, it travels through the first block, and embeds itself into the second block (without falling over) which then collides into...

Homework Statement I don't have the exact problem statement but I remember the important data. I have to find the value of ##x## in the figure such that the projectile reaches to its original position. The initial speed is ##20\sqrt{2}\,m/s## at an angle of ##45^{\circ}## with the...

All the Feynman diagrams I have seen so far for a neutron colliding with a neutrino have a w+ with an arrow from the neutrino to the neutron. Would it not also be possible with a W- leaving the neutron taking away negative charge for it to become a positive proton or is there some quantum rule...

If I have say a stationary rod, and a particle collides with the rod whilst moving at speed v at the top end, why does the rod then proceed to rotate about the centre of mass of the system (whether that be in an elastic or completely inelastic collision where they both stick together). I...

Homework Statement A bullet of mass 4.2 g strikes a ballistic pendulum of mass 2.0 kg. The center of mass of the pendulum rises a vertical distance of 18 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed. Homework Equations The...

Homework Statement I was asked to compare the energy loss of a system of two boxes moving towards each other, colliding elastically and in-elastically in two different situations that are not influenced by friction. There are no springs attached to either massThe Attempt at a Solution I...

Homework Statement Homework Equations K = E + U E = 1/2mv^2 U = mgh The Attempt at a Solution So I think that for a, half the final velocity of m is equal to the initial velocity of 2m. So that's v = sqrt(2gr)/2? Momentum is not conserved because normal force and gravity are...

Hello, I would like find a way to figure out how many unique collision there are between 2 equally subdivided ellipsoids (velocity=1). When you have 2 ellipsoids and you let them collide than you have an infinite amount of possible outcomes. The goal is to reduce this infinite number to...

A racquet ball with mass m = 0.245 kg is moving toward the wall at v = 15.4 m/s and at an angle of θ = 28° with respect to the horizontal. The ball makes a perfectly elastic collision with the solid, frictionless wall and rebounds at the same angle with respect to the horizontal. The ball is in...