Collisions Definition and 693 Threads

Homework Statement A particle of relative mass 4 travels at velocity v, and collides with a stationary particle with relative mass 1. By considering the zero momentum frame, show that the larger particle can be deflected by an angle of arcsin(1/4) at the most. (Note this is a...

Collisions between atomic and subatomic particles are usually perfectly elastic. In one such collision, a proton traveling to the right at 274 km/s collides elastically with a stationary alpha particle (a helium nucleus, having mass 6.65×10−27 kg . I am trying to figure out the velocity of after...

Homework Statement What is an example of an elastic equation on earth? Homework Equations N/A The Attempt at a Solution Is a ball bouncing on the ground a good example of an elastic collision? (If it is)

In outer space a rock with mass 4 kg, and velocity < 3900, -3000, 3200 > m/s, struck a rock with mass 17 kg and velocity < 300, -260, 260 > m/s. After the collision, the 4 kg rock's velocity is < 3500, -2300, 3700 > m/s. What is the final velocity of the 17 kg rock? m1 = 4 kg v1 = < 3900...

Two balls, of masses mA = 40 g and mB = 72 g are suspended as shown in Figure 7-44. The lighter ball is pulled away to a 60° angle with the vertical and released. (a) What is the velocity of the lighter ball before impact? (Take the right to be positive.) (b) What is the...

A 1.0 kg magnetized air puck moving across a level table at 0.24 m/s approaches head-on a stationary, similarly magnetized air puck of mass 0.50 kg. If the "magnetic collision" is repulsive and perfectly elastic, determine: (a) the velocity of each puck after the collision (b) the velocity of...

how do you if the collision is in 2 dimensions?

My notes don't provide an equation. I am given inital and final velocity Vi=50 m/s Vf=25 m/s Thanks.

Why is more impulse delivered during a collision when bouncing occurs than during one when it doesn't?

Homework Statement A bullet with a mass of 4.0 g and a speed of 653 m/s is fired at a block of wood with a mass of 0.093 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits the block, the speed of...

I'm doing a lab were we used photogates to calculate the time before and after the collision. I have an initial Photogate Time and a Final Photogate Time.. Working in excel I need to caculate the velocity final and initial using those times. I also need to find KEi KEf Pi and Pf. I've...

There are the 3 spheres in a line, of masses m , m and M. The 2 spheres on the right are slightly separated and initially at rest, the left sphere is incident with speed Vo. Assuming head on elastic collisions: a) if M =< m , show that there are two collisions and find all the final...

Homework Statement A block of mass m1=1.88 kg slides along a frictionless table with a speed of 10.3 m/s. Directly in front of it, and moving in the same direction, is a block m2=4.92 kg moving at 3.27 m/s. A massless spring with a force constant k=1120N/m is attached to the backside of m2...

Can someone explain to me the vector nature of momentum in a case where two objects collide and stick together?

A 5.00 kg Ball A moving at 12.0 m/s collides with a stationary 4.00 kg Ball B. After the collision, Ball A moves off at an angle of 38.0º right of its original direction. Ball B 52.0º left of Ball A's original direction. After the collision, what is the momentum of Ball A? P1 + P2 = P1'...

Hi, My question probably has a simple answer, but I've been scratching my head over it a little too long so I thought I would ask it here. I have three initial photons involved in a collision with 4-momenta k1, k2 and k3. I have two reference frames: frame 1: the centre of mass frame of...

hi, just wondering if someone could help me with some questions about collisions in accelerators. i have a 1TeV proton beam being collided with a) a fixed target, b) a 50GeV electron and c) an antiproton beam. i have to find the max available energy for the production of new particles in each...

Hello, I have recently been interested in the problem of 2- and 3-dimensional elastic collisions. I just don't understand how to solve these problems analytically: in the 2D case we have 4 variables (x,y components of the velocity times 2 bodies) and only 3 equations (2 conservation of...

Homework Statement Beginning Calculations in Physical Chemistry Barry R. Johnson & Stephen K. Scott Calculate the average number of collisions per second between N_{2} and O_{2} molecules in air @ 298K and @ a pressure of 1 X 10^5 in a room of volume V = 100m^3. (Assume air has the...

Friends: I understand that collisions at high speeds cause a lot more damage. Like when micro meteors strike satellites. Can someone explain how this physics differs from normal collisions? At what velocity do these effects become enlarged? I read about an electromagnetic gun whose...

Hi, I'm trying to figure out the number of g's something undergoes after being dropped and hitting the floor. So far I've figured out that I need the time it takes for the collision to occur. I know it's not instantaneous, but I can't find any information on it, so can you point me in the right...

Putty of mass 5 is compresses a spring with stiffness consonant 3. The spring is stretched and the putty has a completely inelastic collision with another putty of mass 15. How fast and how far do the putties travel? I have no idea how to begin. thanks,,

Hi everyone, i was just wondering, when two objects of the same mass collide (in an elastic collision) the angles that they bounce off from should combine to 90 degrees. right? so I'm trying to prove this, but I'm a little stuck. i used vector component equations, but i arrived at a little...

Homework Statement Given a particle of mass m in box of length L, how would you find the frequency of collisions on a given wall and the momentum of each collisions? Homework Equations The Attempt at a Solution Should I start with the equation for the root-mean-square-velocity...

Hi, Was doing a bit of work the other day and I was looking at collisions. Thinking about real collisions compared to ideal ones and the thing in particular which stands out is that often when two vehicles (for example) collide the striking vehicle will continue to travel some distance in its...

i recently read that it was possible to acelerate an electron, using a synchrotron to 3/4 c ! Does this imply that if two electrn beams were to be accelerated in this way that the resultant velocity of a collision would be 3/2 c ? If so what would this b like, i.e. there be lots of mass...

Homework Statement Which of the following statements are true about elastic and inelastic collisions? True False for elastic collisions, linear momentum is conserved but kinetic energy is not True False for inelastic collisions, neither linear momentum nor kinetic energy is conserved...

Hi there :biggrin: I'm having a bit of a conceptual difficulty regarding the equations for inelastic collisions. Suppose a body of mass M1, moving at initial velocity V1, collides and sticks to another body, mass M2, moving at some other initial velocity V2. They then move together with a...

Homework Statement A uniform symmetric ellipsoid (Mass M) has a large semi axis c and small semi axis a. A particle of mass m<<M is moving along a straight line parallel to the x-axis. Its y-coordinate is a/2 and its z-coordinate it c/2. After an inelastic collision, it sticks to the ellipsoid...

Homework Statement A bullet of mass m moving with velocity V_o crashes into a block of mass M at rest on a frictionless horizontal surface the block is sitting at the edge of a table that is H high. When the bullet hits the block it flies off the table and it lands a distance x from the bottom...

This is a homework question from my thermal physics class. (Problem 6.40 from Schroeder's Introduction to Thermal Physics). Homework Statement "You might wonder why all the molecules in a gas in thermal equilibrium don;t have exactly the same speed. After all, when two molecules collide...

Say we have two waves of the same amplitude are about to collide with each other. The preceeding wave travels at a slightly higher speed before interacting with the final wave. However, instead of passing through the final wave its speed and size is transferred into the final wave where it...

hi, i am doing a lab about analyzing one-dimensional collisions. There are two synthesis questions that i don't know how to even begin with. 1. How could the results of this investigation be applied to determine the mass of a sealed refuse bag on board the International Space Station...

Hi, I'm wondering if I'm forgetting some key point about elastic collisions from my basic mechanics. If you don't want to read my lengthy solution, just read the problem statement and then answer the following: can this problem be solved essentially at a glance, without the lengthy algebra I...

According to a textbook that I was looking at, electron capture and electron-proton collisions both produced a neutron and an antineutrino, but one was mediated by a W+ particle and the other by a W-. Is this correct, or are they interchangeable?

Homework Statement 1) Two identical bodies, each with rest mass m(o), approach each other with equal velocities u, collide and stick together in a perfectly inelastic collision. Determine the rest mass of the composite body. Homework Equations The Attempt at a Solution The...

Homework Statement In 1986, four high school students built an electric car that could reach a speed of 106 km/h. The mass of the car was just 60.0 kg. Imagine two of these cars performing in a stunt show. One car travels east with a speed of 106.0 km/h and the other travels west with a...

Can QFT be used to anything else but particle collisions? Particle collisions seem to be the major application of the theory, but it hasn't become clear to me if it works for anything else.

I need help with this question please: A 25.0g object moving to the right at 20.0cm/s overtakes and collides elastically with a 10.0g object moving in the same direction at 15.0cm/s. Find the velocity of each object after the collision. The answer is: 17.1cm/s (25.0g obect), 22.1cm/s...

H guys, I want to first start off by saying that I am not here for handout to my homework. I am here because maybe you guys can help me understand physics. I am currently enrolled in a calculus-base physics that is kicking my ass and I need some help understand the different subjects...

Need help solving this problem http://img409.imageshack.us/img409/5854/chp851yx1.jpg Thank you

Homework Statement We have two particles mass m called p1 and p2. P1 is stationary, p2 has energy E. They annihilate to produce to particles of mass 100m. We need to find the min value of E Homework Equations The Attempt at a Solution I suspect that the minimum initial energy of...

Homework Statement There is a frictionless table 1 meter above the ground. A spring is on one end of the table with a constant of 200N*m that is compressed .5m by a block of 5kg. The block of 5kg is released and then collides with a 2kg block also sitting on the table. a. Find the velocity...

You are at the controls of a particle accelerator, sending beam of 2.70*10^7 m/s protons (mass m) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown element. All such protons rebound with a...

This is an angular inelastic collision problem: Mary, Bob and Jane are having a snowball fight. Mary throws a 50g snowball 60 degrees S of E at 6 m/s. Bob throws his 15g snowball 2.75m/s north. Jane's throws her 35g snowball at 3.25m/s west. How fast and what is the direction of the huge...

This might be stupid but I was thinking, when two subatomic particles collide at very high speeds, they form a bigger particle whose mass is less than the sum of the smaller ones, and the mass lost transforms into energy as in Einstein´s equation E=mc2. What happens with non subatomic...

A 49 g 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 0.5 ms. The ball rebounds elastically and returns to its original height. The time interval for a round trip is 7.00 s. In this situation, the average force...

Hi, I am having problems with a particular question it says: Two 30kg children, each with a speed of 4.0m/s, are sliding on a frictionless frozen pond when they collide and stick together because they have Velcro straps on their jackets. The two children then collide and stick to a 75kg man...

When two masses collide, assuming there are no external forces on the system of the two masses, will they collide with the same velocities or will it depend on the conserved momentum? Edit -- Assume they're released from rest, since that's what the problem I'm working on states.

My question is not so much what to do it is just i have problems solving for a certain equation. A 5.00kg ball, moving to the right at a velocity of 2m/s on a frictionless table, collides head-on with a stationary 7.50kg ball. Find the final velocities of the balls if the collision is (a)...