Collisions Definition and 693 Threads

I was reading about what would happen if an Anti-Matter star and Matter star collided. What I read says the collision would make enough gamma rays to sterilize and entire eighth of a galaxy of life. Yet, I thought about something, when the two collide, their surfaces would touch first. (Duh) So...

In a nuclear reactor, neutrons released by nuclear fission must be slowed down before they can trigger additional reactions in other nuclei. To see what sort of material is most effective in slowing (or moderating) a neutron, calculate the ratio of a neutron's final kinetic energy to its initial...

Imagine that two vehicles traveling on a frictionless surface crash into each other. Vehicle A is traveling due north, vehicle B is traveling due east, they smash into each other, and B skirts off at an angle exactly 60 degrees south of east while A skirts off at an angle exactly 60 degrees...

The Problem: The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.025 kg and is moving along the x-axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.050 kg and is initially at rest. The collision is not head-on...

can anyone offer up some help? I've been working on this forever with no success. On a frictionless surface, a 0.35 kg puck moves horizontally to the right (at an angle of 0°) and a speed of 2.3 m/s. It collides with a 0.23 kg puck that is stationary. After the collision, the puck that was...

Here's the problem: "Two steel balls are suspended on (massless) wires so that their centers align. One ball, with mass 2.30 kg, is pulled up and to the side so that it is 0.0110 m above its original position. Then it is released and strikes the other ball in an elastic collision. If the...

# In a perfectly elastic relativistic collision, which one of the following quantities is not conserved: a)Momentum b)Energy c)Rest mass d)Angular momentum In non relativistic elastic collisions, energy and momentum will be conserved. But I don’t know about relativistic elastic collisions...

I was assigned this problem from my physics teacher, but it doesn't really make sense. I would ask the teacher, but I don't go back to class for a few days. At this point, I just need help trying to understand what the problem is asking for. Thanks very much in advance for any help. Find the...

A 56g steel ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for .5ms. The ball rebounds elastically, and returns to its original height. The time interval for a round trip is 8.00s. In this situation, the average force...

In a volume V there exist N particles of diameter d. If we place some detector in this volume, what is the probability that the detector will measure a collision in a time interval t. Or what is the probability that the detector will travel some specified distance into this volume. There...

My question is "If I have an immobilised substrate (protein molecule), is it more likely that when in a solution with enzymes(which are free to move) that a collision will occur than if the substrate was mobile. Any input would be appreciated :smile:

Ok. I need help in how to even just start this problem. "Starting with an initial speed of 5.00 m/s at a height of 0.280 m, the 1.75 kg ball swings downward and strikes the 4.75 kg ball that is at rest. a) Using the principle of conservation of mechanical energy, find the speed of the 1.75...

After a completely inelastic collision, two objects of the same mass and same initial speed are found to move away together at 1/4 their initial speed. Find the angle between the initial velocities of the objects. I figured.. 2m(v/4) but then i just get lost... can someone help! thanks!

Hi guys! I was hoping that some of you smart guys and gals might be able to help me. I'm looking for the simplest way to describe a series of collisions. Basically, an object colliding with another object, then a time delay and then another object colliding with the first two and so on...

Q. A 0.150 kg billiard ball (A) is rolling toward a stationary billiard ball (B) at 10.0 m/s. After the collision, ball A rolls off at 7.7 m/s at an andle of 40.0 degrees clockwise from its original direction. What is the speed and direction of Ball B after the collision? Known: M of...

Can anyone tell me what i am doing wrong for this problem? Two 75 kg hockey players skating at 5.75 m.s collide and stick together. If the angle btween their initial directions was 125 degrees, what is their velocity after the collision? I used the formula Vf = m1v1/(m1+m2) cos 125 for the x...

i need a help on this problem a 20g rifle bullet traveling 250m/s buries itself in a 3.8kg pendulum hanging on a 2.3m-long string. how far does th ependulum swing horizontally? Physics 3rd edition Douglas C. Giancoli

i need help for this problem if anyone could solve this, it's wonderful A 20g rifle bullet traveling 250m/s buries it self in a 3.8kg pendulum hanging on a 2.3m-long string. how far does the pendulum swing horizontally? Physics 3rd edition Douglas C. Giancoli

a 11.9g bullet is fired vertically into a 5.49kg block of wood. the bullet gets stuck in the block, and the impact lifts the block 0.11m up. given g=9.8m/s^2. what was the initial velocity of the bullet? Pi=Pf is this right...

Hi, I would like somebody to verify if I have correctly solved a problem. The problem is this: Rock of mass m falls from height 20 m to the ground. What is the average force of the ground acting on the rock if it takes 0.025 s to bring the rock to full stop. Express the force in relation to...

Hi there, i've been coding a simulator (ellastic collisions with billard balls) and i wanted to check if the results the program outputs are indeed valid. My doubts are with multiple collisions at the exact same instant and with kinetic energy as well. . Just to make clear, a possible...

having trouble with this problem in my textbook two pucks collide, puck A has a mass of 0.32kg, and an initial velocity of 0.04 m/s [54 N of E], and a final velocity of 0.034 m/s [N] puck B's mass is unknown but has an initial velocity of 0.038 m/s [S of W] and a final velocity of 0.028 m/s...

I have been dueling with this problem for a hour or so now... a 5.00g bullet moving with an initial speed of 400 m/s is fired into and passes through a 1.00-kg block. The block, initially at rest on a frictionless, horizontal surface, is connected to a spring with a force constant of 900 n/m...

dear god i just typed a full page and it decided to give me a 404, i hate computers. First time i had to use this forum in a long time but I am very stuck today and can't find a way out of it after over an hour and with reading my notes so here goes. 1)a proton of mass m traveling at...

Lets say that there is a man flying in a spaceship going fast enough that to another observer standing on the Earth he appears to be twice as big as normal due to relativistic mass (I might be wrong here, and relativistic mass doesn't make you look bigger). From the man's frame he would say he...

Please Help! 2 Question involving momentum and collisions Just some questions in calc-based physics. Thanks in advance. 1) A 25 kg child is in a 10 kg sled that travels 1 m/s east on ice. The child throws a 3 kg snowball at 40 m/s at an angle of 50 degrees north of east. Find the velocity of...

How would I go about this problem? Any advice would be really helpful, please. A bat strikes a 0.154 kg baseball. Just before the impact, the ball is traveling horizontally to the right at 50m/s, and it leaves the bat traveling to the left at an angle of 30 degrees about the horizontal with a...

Impulse 1) A gold ball of mass 0.045 kg is hit off the tee at a speed of 45 m/s. The golf club was in contact with the ball for 3.5 x 10^-3 s. Find (a) the impulse imparted to the golf ball and (b) The average force exerted on the ball by the golf club. Answer: (a) 2.0 kg(m/s) (b) 15.8 x 10^2...

In the kinetic theory, it is supposed that the molecules make elastic collisions with the walls of the container. Imagine that the collisions were inelastic. Describe and explain the consequence of this with regard to the temperature of the gas. So far, i have said that not all of the molecules...

Two particles of masses M and 3M are moving towards each other along the +x and -x directions with the same initial speed 3.29 m/s. They undergo a 'head-on' elastic collision and each rebounds along the same line as it approached. What is the final speed of the particle of mass M in m/s? so i...

Two blocks can collide in a one-dimensional collision. The block on the left hass a mass of 0.50 kg and is initially moving to the right at 2.4 m/s toward a second block of mass 0.80 kg that is initially at rest. When the blocks collide, a cocked spring releases 1.2 J of energy into the system...

Hey hey!:biggrin: A 10g object moving to the right with a speed of 20cm/s makes an elastic head-on collision with a 15g object moving in the opposite direction with a speed of 30cm/s. Find the velocity of each object after the collision. So I have to come up with two equations and solve for...

I have a problem in which two objects collide (elastic) in two dimensions. I am given the vectorial components of the initial velocities of each object as well as their masses, which are different. I also know the final velocity of the smaller object, which is 0 (it comes to rest after the...

I was thinking , if we take into account oly the internal motion of atoms , all collisions will turn out to be elastic. Wont they be?

I am try to write a program with 3D spheres of different masses, radius, velocities and angles. Then use three dimensional elastic collision equations to find the spheres new velocities and angles. The problem is that i can't find any information or equations on 3D elastic collisions, only 1D...

Hi all, I was wondering if someone can help me, its been a while since I did classical mechanics, I have a question I would appreciate a little help from anyone! 2 objects with the same mass m and same velocity v have an inelastic collision . After the collision the 2 object system of...

Here's my problem: Car A (mass 970 kg) is stopped at a traffic light when it is rear-ended by car B (mass 1600 kg). Both cars then slide with locked wheels until the frictional force from the slick road (with a low mk of 0.23) stops them, at distances dA = 5.8 m and dB = 3.6 m. What are the...

An atom of mass m moving in the x direction with speed v collides elastically with an atom of mass 3m at rest. After the collision the first atom moves in the y direction. Find the direction of motion of the second atom and speed of both atoms (in terms of v) after the collision? Ans: mass m...

Cart A and B are equal mass ( 500 kg each) and have frictionless wheels. Cart A has a spring attached to its end with a constant 2000 N/m. Cart B has a spring constant attached to its end with a different spring constant. They both sit on a track with their spring facing each other, and are...

Suppose that a particle of mass m1 approaches a stationary mass m2 and that m2 > m1. a) Describe the velocity of m2 after an elastic collision--that is, one in which both momentum and kinetic energy are conserved. Justify the answer mathematically. b) What is the approximate momentum of m1...

Collisions-- Simple Algebra Problem... Hi, So... I think I'm having a simple algebra problem-- I was just wondering if someone could point out my error. This is the problem: Block 1, of mass m_{1}, moves across a frictionless surface with speed u_{i}. It collides elastically with block...

There's something in my theoretical mechanics handbook that i don't quite understand. Say you have an observer in a labratory watching 2 particles, one of which is in a state of rest (m_2) and the other one (m1) is moving towards it. the placevector of the center of mass of the system is...

Some gas is put into a gas syringe with a frictionless piston which does not allow the escape of any gas. The gas is initially at 20C and is then heated to 100C. The piston is allowed to move. At 100C a time will come when the piston will stop moving outwards and become stationary(this will...

Just a quick question, has any research instutute such as CERN managed to produce a new stable particle such as a neutron, or even produced and extra electron or proton as a result of colliding electrons and positrons at high energies? or are the untold ?new? but shortlived particles of such a...

A block of mass 2kg oscillates on the end of a spring in SHM with a period of 20ms. The position of the block is given by: x=(1.0cm)cos(wt+2pi). Another block of mass 4kg slides toward the oscillating block with velocity of 6m/s. The two blocks undergo a completely inelatic collision at time...

Hello, http://img219.exs.cx/img219/9273/lastscan19rc.jpg Can anybody explain how to startup the questions? Thank you!

Some people argue that a non-viscous gas could not result in a drag for moving objects because the kinetic energy could not be dissipated to the gas. However, this view neglects the fact that even if the gas molecules do not interact with each other (i.e. if the gas is inviscid), they still...

A meteor whose mass was about 10^8 kg struck the Earth (m = 6.0 X10^24 kg) with a speed of about 11 km/s and came to rest in the Earth. (a) What was the Earth's recoil speed? (m/s) (b) What fraction of the meteor's kinetic energy was transformed to kinetic energy of the Earth? (%) (c) By...

Given: Two gliders on an air track collide. Glider A has a mass of 0.269 kg and is moving in the +x direction with a speed of 1.07 m/s. Glider B has a mass of 0.330 kg and is moving in the -x direction with a speed of 0.675 m/s. a) What is the velocity of A and B if the collision is...

A proton is traveling to the right at 2.0E7 m/s. It has a head-on perfectly elastic collision with a carbon atom. The mass of the carbon atom is 12 times the mass of the proton. What are the speeds of each after the collision? i was trying to tinker with the fact that the KE before and after...