Collisions Definition and 708 Threads

Homework Statement Two particle P and Q each of restmass m0 and moving in collision course at 2/3c in the laboratory frame of reference. In the same collision but in particle P's frame of reference, P is at rest. Homework Equations As the total energy of the particles depends on the frame...

Homework Statement Two particle P and Q each of restmass m0 and moving in collision course at 2/3c in the laboratory frame of reference. In the same collision but in particle P's frame of reference, P is at rest. Homework Equations As the total energy of the particles depends on the frame...

Homework Statement 2. A 20.0 kg projectile is fired at an angle of 60⁰ above the horizontal with a speed of 80.0 ms-1. At the highest point of its trajectory, the projectile explodes into two fragments of equal mass, one of which falls vertically with zero initial speed. Ignoring air...

I need a formula that yields the speed and angle after a 2D collision that uses the coefficient of restitution (e). Preferably this would also be relativistic. I have searched EVERYWHERE for this and could not find it. To "prove" that I have indeed tried I have read the collision sections of...

When a neutrino and an anti-neutrino collide they produce a photon , from what field does this photon come from. Photons are excitations of an EM field correct. or what about neutron anti-neutron collisions .

I have a lab report due tonight. We were working on these in lab and I'm not sure how to tell which one was elastic or inelastic. We had three cases. We had to use the conservation of momentum and kinetic energy formulas.A ) Cart A and B have equal masses. Car B is at rest. Car A strikes car B...

Homework Statement An object (m1 = 5kg) starting from a height of 5 meters, slides down a frictionless track as shown (first object starts in a vertical position, slides down a curved track, and collides with object 2 in a horizontal position) and collides with a second object (m2 = 10kg)...

Homework Statement In a particular atom, an alpha particle makes N collisions with a potential barrier in each second. The transmission coefficient at the barrier is 1.0e-15. In one second, 2.0e18 alpha particles are emitted from a group of 3.0e23 radioactive atoms. Find N. Homework...

Well, I know we use momentum to determine the velocities after a collision, but what about forces. Say a 1000kg car going at 20 m/s hits a wall with a mass of 500kg. What determines how much force the wall will experience by the car if there is no acceleration in the horizontal direction? Only...

hi, Look at this experiment http://img243.imageshack.us/img243/4150/inelasticcollision2.jpg http://img13.imageshack.us/img13/2914/inelastic2.jpg in this experiment , the law of conservation of energy can't be applied because the KE is lost but this is not true for all the cases of...

Homework Statement a ball of mass 2kg is traveling North with a Velocity 6m/s when it collides with an identical, stationary ball. after the collision, one of the ball moves with a velocity of 2m/s at an angle of 30deg east of north. find Velocity of the other ball. m1=2kg m2=m1 v1=6m/s...

Can someone give some opinions on the following? The 2 main arguments from this site i can tell are: that hawking radiation isn't proven. And that high energy collisions in the upper atmosphere travel at a fast speed & the small black holes can escape from Earth unlike in the lhc. I...

Hello, With laser cooling experiments it is possible to create Bose–Einstein condensate. Is there also vapor produced during high-energy particle collisions? And if so, what kind of gasses are it? michel

I'm trying to understand electron-positron collisions and I've got a few questions if you don't mind :) I know hadrons can be created through electron-positron annihilation. Can protons be produced like this? Has it been done before? How much energy would be required? How do you figure...

Homework Statement A 100 kg man and a 90 kg man are rounding a corner and collide. The heavier man is running, while the 90 kg man is walking. What happens to the momentum of the 100 kg man? Does it increase, decrease, stay the same, or "is conserved"? Homework Equations Change in...

Homework Statement A ball of mass 2m is moving with a velocity Vo collides elastically and head-on with another ball of mass m at rest. Find the minimum kinetic energy of the system. Homework Equations K = 1/2 mv2 The Attempt at a Solution I personally do not understand what is...

Homework Statement Consider a pool table that contains two identical balls. Ball 1 is rolling at a speed of 1.1 m/sec when it hits ball 2 which is at rest. The coefficients of friction between the balls and the table are 0.8 (potential) and .5 (kinetic). The collision is perfectly elastic...

I'm trying to figure out the role that kinetic energy and momentum play in projectile collisions. there are two cases: 1.) when the projectile becomes completely embedded in the target and 2.)When the projectile completely passes through the target and flys out the other end. If the collision...

Homework Statement A uniform rectangular tile drops without spinning until its corners reach positions (0; 0; 0); (2a; 0; 0); (2a; 2b; 0); (0; 2b; 0), when it strikes the top of a vertical pole at a point very close to the (0; 0; 0) corner. Just before impact the velocity of the tile was...

Homework Statement I am unsure about how to go about solving an oblique elastic collision question, I understand that momentum is conserved and how to calculate momentum but unsure as to how to calculate the vectors. The question is : A 45g marble collides with an identical stationary...

Homework Statement After some messey algebra it can be said that V_B = (2 m_A V_o_A)/(m_A + m_B) V_A = ( (M_A - M_B ) V_o_A )/(M_A + M_B) were did this come from? Homework Equations momentum The Attempt at a Solution I don't even know were to start

Hi, I have my AS physics exam tomorrow and the only thing on the syllabus I'm unsure of is the reaction between a neutron and a neutrino and also the reaction between an antineutrino and a proton. A Ve is an antineutrino, I can't work the overline codes :/ I've seen various feynman...

First post here so sorry if I got it in the wrong spot. I'd like to say though I am very exited to have found this site. I see some sleepless nights in my very near future :wink: Matter/antimatter collisions, appear to me, to violate the Law of conservation of matter and energy. I suspect...

Just to begin, uhh. I'm 75% sure my work makes logical sense [I hope], and that my problem lies in a computational error. But I really don't know why my answers aren't working out. I've now gone through the problem in 3 different ways, and I keep getting the same answer, but it's apparently...

when two neutron stars collide, do they creat both a balck hole and release gamma rays or does it happen in stages?

Homework Statement A particle physicist seeks to create a new fundamental particle with rest energy 200GeV by colliding electrons and positrons. What is the minimum positron energy required when electrons and positrons traveling in opposite directions with equal speeds are collided together...

Is a gravity wave a disturbance in the field , could we maybe try and detect gravity waves by colliding matter and antimatter and seeing what that does to the field .

Homework Statement Regarding two-dimensional collisions, I just don't understand why my book suddenly changes vector positions and theta angles at different places than what I was accustomed to. I understand that they're getting me to think by changing questions and answers, but I'm confused...

I think what I'm doing is overkill because all I want to know is when to use sin and cos in the components regarding (isolated) two-dimensional collisions. I'm just showing more content because it might help for context. Also, there are more steps in order to find the final velocity which is...

The question is: In outer space, 2 objects collide. 1. Explain if the momentum of one of the objects is conserved. 2. Is the total momentum of both objects conserved? Why? 3. Before the collision, the two masses have non-zero total kinetic energy. After the collision, explain if their total...

Homework Statement Car A has a mass of 1900 kg and crashes into parked Car B with a mass of 1100 kg. Car A claims to have hit the brakes 15 metres before crashing into Car B. After the collision, Car A slid an additional 18 metres while pushing Car B 30 metres from its parked position. The...

1. At 100C the rms speed of nitrogen molecules is 576 m/s. Nitrogen at 100C and a pressure of 2.0 atm is held in a container with a 10cm x 10cm square wall. 2. N_coll / deltaT = 0.5(N/V)*A*v_x 3. I know that I have to use v_rms/3 = v_x = 192 m/s, and the area will be 0.01 m^2. Is...

I am in the middle of a large project as an undergrad mech. engineering student and my team and I are having some modeling issues. Here is a description of our task: We must modify the design of a digital spool valve for a company. We have a spool, and 2 electro-magnetic endcaps that the...

Homework Statement A mass weighing 1kg at the top of a frictionless hill where theta = 50 and is 3m long is released from rest and collides inelastically at bottom with a second mass weighing .25 at rest. The pair then slides up the second incline that's .5m high and fly’s off with a certain...

1. A force F=2.0N is applied for 0.5sec to a ball of mass m=0.5kg at rest on a smooth surface (no friction). Determine the momentum P and the velocity v imparted to the ball due to the impulse from the applied force F. 2. A ball of mass m1=0.5kg moving with a velocity v01=2.0m/sec moving in a...

Is there a solution to finding out how exactly 2 spheres of non-equal mass and radius rebound after they collide? I know how to do it for equal mass and radius, finding the line of the collision, and then the components of velocity perpendicular to that line don't change. Does that hold true for...

Hello. I have a problem that is making me crazy. Consider the following collision A + B \rightarrow C which results in both particles (A and B) being destroyed and C being created. I know the rest mass of all particles. Also, in the lab system, B is stationary and A is moving toward...

Homework Statement A 47.0g ball is fired horizontally with initial speed (Vo) toward a 110g ball that is hanging motionless from a 1.00m -long string. The balls undergo a head-on, perfectly elastic collision, after which the 110g ball swings out to a maximum angle theta = 52.0 degrees. What...

Let's say we have two perfectly rigid spheres. One is at rest and the other is moving toward it with some differentiable velocity. When they collide, the first sphere will start moving with infinitesimal velocity and the second will reduce its speed by an infinitesimal amount. But since the...

1. Homework Statement A 0.1kg is shot with a speed of 6m/s toward a 1.2kg spring gun( with spring constant of 0.4N/m). The spring gun is initially at rest with its spring relaxed. The spring gun is free to slide without friction on a horizontal table. The 0.1 kg mass compresses the spring to...

Homework Statement A frictionless puck of mass m slides down a ramp with considerable speed. You wish to slow it down by having it collide (not necessarily head-on) with other pucks at rest with as few collisions as possible. What mass would you choose for the pucks at rest? (The same physics...

Homework Statement A 0.1kg is shot with a speed of 6m/s toward a 1.2kg spring gun( with spring constant of 0.4N/m). The spring gun is initially at rest with its spring relaxed. The spring gun is free to slide without friction on a horizontal table. The 0.1 kg mass compresses the spring to its...

Homework Statement In a pool game, the cue ball, which has an initial speed of 8.0 m/s, make an elastic collision with the eight ball, which is initially at rest. After the collision, the eight ball moves at an angle of 30° to the original direction of the cue ball. Homework Equations V8...

1.A particle starts out at rest at point A at the top of a smooth curved track of vertical height 40cm. a> what is its speed at the bottom of the curved track? b> How far along the adjoining inclined plane, which makes an angle of 30 degree with the horizontal, will the particle go, assuming...

Hubble discovered that galaxies are moving away at each other at a rate, today physicists believe that this rate is increasing. I've read about galactic collisions, and that the Andromeda galaxy will eventually collide with the milkyway. If the galaxies are moving away from each other, then how...

1. A car (mass = 1060 kg) is traveling at 43 m/s when it collides head-on with a sport utility vehicle (mass = 2550 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling? 2. COLM states: m1Vf1 +...

Homework Statement Particle 1 of mass m1 = 0.30 kg slides rightward along an x-axis on a frictionless floor with a speed of 2.0 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then reaches a wall...

Homework Statement In the figure below, block 2 (mass 1.4 kg) is at rest on a frictionless surface and touching the end of an unstretched spring of spring constant 170 N/m. The other end of the spring is fixed to a wall. Block 1 (mass 2.0 kg), traveling at speed v1 = 4.0 m/s, collides with...

Homework Statement A bullet with a mass of 4.0 g and a speed of 661 m/s is fired at a block of wood with a mass of 0.075 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...

Homework Statement A bullet of mass 6 g strikes a ballistic pendulum of mass 2.0 kg. The center of mass of the pendulum rises a vertical distance of 14 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed. Homework Equations KE=1/2(mv^2)...