Inelastic collision Definition and 330 Threads

http://img74.imageshack.us/img74/7216/physec7.png m1v1+m2v2 = (m1+m2)v IMPACT: Total Energy = 1/2mv^2 POINT P: 1/2mv^2+mgh = Total Energy at Impact

Homework Statement In the question that we were given it states that the resulting collision is a completely inelastic collision. Then it asks us to solve for the momentum and kinetic energy. For the momentum part I have already solved it and have values for final and initial velocities...

Homework Statement particle 1 with mass 6.7 kg going 7.3 m/s collides inelastically with a particle of mass 4 kg at rest. find the final velocity of particle one after the collision. Homework Equations Ki = Kf but, mechanical energy is not conserved in an inelastic collision. pi = pf...

Inelastic collision: Momentum conserved, KE not-- How? This is a question about the text of Hailiday/Resnick/Walker 8th ed. p217 - 219. It's not a homework problem, but just about understanding the text, so I hope I am posting to the correct location, if not, please advise. In the text they...

1) A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. What is the speed of the wreckage just after the collision? Relevant equations: m1v1 - m2v2 = (m1+ m2) vfinal My attempt: This is an inelastic collision because the...

Homework Statement A bigger, moving, vI]i[/I], collides with a smalled train that is not moving. Assume that after the collision the trains stick together. Assume the trains have different masses (mbig and msmall). Write doen the momentum conservation equation for the scenario. Solve for the...

Hi everyone! I've been on the question for a while and I'm not quite sure where I'm going wrong. If someone could help me out, I'd really appreciate it! Problem Two ice-fishermen are driving trucks across a frozen and frictionless lake. Truck 1 (m1 = 1190kg) is traveling with a speed of...

An electron with a kinetic energy of 4.9eV collides inelastically with a stationary mercury atom. Why can you assume almost 100% of the electron's energy can go into raising the mercury atom to its first excited state? I know that with an inelastic collision both energy and momentum are...

Homework Statement One way to measure the muzzle velocity of a bullet is to fire it horizontally inot a massive block of wood hanging from a string an d measure the height to which the wood (containing the bullet) rises. in one experiment the bullet had a mass of .05kg, and the wood has a...

A block of mass m1 = 1.8 kg slides along a frictionless table with a speed of 10 m/s. Directly in front of it, and moving in the same direction, is a block of mass m2 = 4.4 kg moving at 2.8 m/s. A massless spring with spring constant k = 1160 N/m is attached to the near side of m2, as shown in...

Homework Statement A 2000kg car moving east at 10 m/s collides with a 3000kg car moving north. They stick together and move as a unit after the collision, at an angle of 40 degrees north of east and at a speed of 5.22 m/s. Find the speed of the 3000kg car [B]before[B] the collision...

Homework Statement A 0.291 kg rubber ball is dropped from a height of 3.72 m, and it rebounds to a height of 2.88 m. Assume there is no air friction. a) Find the magnitude of the impulse exerted by the ground on the ball. Homework Equations Vf^2=V0^2+2as MV=P DeltaP=I The...

Homework Statement A 18.00 Kg lead sphere is hanging from a hook by a thin wire 3.80 m long, and is free to swing in a complete circle. Suddenly it is struck horizontally by a 4.50kg steel dart that embeds itself in the lead sphere. a)What must be the minimum initial speed of the dart so...

Homework Statement A bullet is fired vertically into a 1.20 kg block of wood at rest directly above it. If the bullet has a mass of 24.0g and a speed of 540 m/s , how high will the block rise after the bullet becomes embedded in it? Homework Equations 1/2mv^2+mgh=1/2mvf^2+mgh mv=mvf...

Homework Statement A 2.0 kg object is moving at 5.0 m/s NORTHWEST. It strikes a 6.0 kg object that is moving SOUTHWEST at 2.0 m/s. The objects have a completely inelastic collision. The velocity of the 6.0 kg object post collision is: Homework Equations m1v1+m2v1 = m1v2+m2v2...

Homework Statement Two rolling gold balls of the same mass collide. The velocity of one ball is initially 2.70 m/s [E]. After the collision, the velocities of the balls are 2.49 m/s [62.8 degrees N of W] and 2.37 m/s [69.2 degrees S of E]. What are the magnitude and direction of the unknown...

Collisions and Determining the Original Speed Homework Statement Two spacecraft s from different nations have linked in space and are coasting with their engines off, heading directly toward Mars. The spacecraft s are thrust apart by the use of large springs. Spacecraft 1, of mass 1.9 x...

Homework Statement It's the bottom of the ninth inning at a baseball game. Score is tied with a runner on 2nd when the batter gets a hit. The 85 kg runner rounds 3rd and is heading home with a speed of 8.0 m/s. Just before he reaches home plate he crashes into the catcher and the two players...

Homework Statement A 5.00 g bullet moving with an initial speed of 410 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 of force constant 965 N/m. 1. If the block moves 5.20 cm...

[SOLVED] MCAT Passage: Inelastic Collision Homework Statement A car (1000 kg) and a truck (2000kg) start from rest on a long, straight track. At time t=0, the truck is at position x=0 and the car is at position x=100m. Both vehicles then accelerate toward each other and collide. Both the...

[SOLVED] Inelastic collision on a frictional surface

Homework Statement Hi, I would just like to know if I'm on the right track with this one. I have two identical particles with a radius R and mass M. One is at rest and the other moves directly down with a velocity v0. The second particle hits the first particle slightly offset, so that the...

[SOLVED] Conservation of linear momentum and inelastic collision Homework Statement I have a homogeneous beam of length L and mass M, attached with a frictionless hinge at one of the endpoints O. The beam is affected by gravity, g, in the negative y-direction. Initially the beam hangs...

Ok, the question is the following: "In a railroad switchyard, a 56 ton freight car is sent at 7.0 mi/h toward a 31 ton car that is moving in the same direction at 26 mi/h." - what is the speed of the pair after they couple together? -what fraction of the initial kinetic energy was lost...

Homework Statement Two 23-cm long pendulums (each made of a massless string and a ball) are initially situated as shown in the figure. The masses of the left and right balls are m1= .145 kg and m2= .200 kg , respectively. The first pendulum is released from a height d= .092 m and strikes...

[SOLVED] Partial Inelastic Collision Is it ok if I keep this here for my own reference (and others if it helps them)? I don't know why it helps to type everything out before I realize what I did wrong! But looking back on my work seems to reinforce what I learned. Homework Statement As...

After a completely inelastic collision, two objects of the same mass and same initial speed are found to move away together at 1/3 their initial speed. Find the angle between the initial velocities of the objects. I think that this question is dealing with collisions in two dimensions. My...

Homework Statement 2 equal masses travel in opposite directions at equal speeds. They collide in a perfectly (inelastic) collision. Just after the collision their velocities are: A)Zero B)equal to their original velocities C)equal in magnitude but opposite in direction of their original...

Homework Statement A bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length L and negligible mass. What is the minimum value of v such that the pendulum bob will barely...

Homework Statement A particle of mass m1 and velocity u1 collides with a particle of mass m2 at rest. The two particles stick together. What fraction of the original kinetic energy is lost in the collision? Homework Equations Conservation of momentum law The Attempt at a Solution...

I am not even sure if my question itself is correct. According to ideal gas law, all the collisions for a gas molecules are elastic in nature. Now, suppose a hydrogen atom collides with a neutron (assuming 1-D motion for simplicity), will i consider that collision to be elastic always, or are...

Lets say an object with an initial velocity collides with a still object. Collision is perfectly inelastic and the surface is frictionless. How can i know how far it traveled? I solved for the sum of P final = the sum of P initial, but then i don't know how to relate to distance, all i have is...

A m=1.5 kg object moving at 14 m/s collides with a stationary 2.0 kg object. If the collision is perfectly inelastic, how far along the inclined plane will the combined system travel? Neglect Friction. Any help would be appreciated

I actually have two problems that I have been struggling with that are very similar, so I believe that I am making the same incorrect assumption for both problems, but I am at that point where I have been re-trying the problems for so long that I do not think I am going to find my mistake...

[SOLVED] About perfectly inelastic collision I have one problem about prefectly inelastic condition. When I read the reference book, it mentioned that when one object moving with an initial speed u1, and another object is in rest, after collision, if both object moved together as one object...

Homework Statement A rifle bullet with mass 8.00g strikes and embeds itself in a block with mass 0.992 kg that rests on a frictionless, horizontal surface and is attached to a coil spring. The impact compresses the spring 15.0 cm. Calibration of the spring shows that a force of 0.750 N is...

Homework Statement A drunk driver strikes a parked car. During the collision the cars become entangled and slide to a stop together. The drunk driver's car has a total mass of 742 kg, and the parked car has a total mass of 776 kg. If the cars slide 18 m before coming to rest, how fast was the...

Ok, so I have this practice problem: a mass of 5 kg has hit a ball at 8 m/s. The ball it hit has a mass of 7 kg. What is the distance the ball traveled? It's really frustrating when my notes don't go over ANY of this.

Homework Statement What is the angle theta with respect to north made by the velocity vector of the two cars after the collision? Express your answer in terms of phi. Your answer should contain an inverse trigonometric function. the cars are both of mass m. Homework Equations I already found...

If a car crashed into a tree, or a head-on collision with another vehicle, the collision would be completely inelastic correct? What would the kinetic energy be converted to? Internal energy?

Homework Statement An atom of mass M is initially at rest, in its ground state. A moving (nonrelativistic) electron of mass m[SIZE="1"]e collides with the atom. The atom+electron system can exist in an excited state in which the electron is absorbed into the atom. The excited state has an...

Homework Statement George of the Jungle, with mass m, swings on a light vine hanging from a stationary branch. A second vine of equal length hangs from the same point, and a gorilla of larger mass M swings in the oposite direction on it. Both vines are horizontal when the primates start...

Homework Statement Is it true that a completely inelastic collision can be elastic (i.e. KE could be conserved) such as when you fire a gun at a metal ball at rest and the bullet and the metal ball stick togethor? Isn't completely inelastic somewhat of a misnomer since it implies that the...

Homework Statement Your friend has just been in a traffic accident and is trying to negotiate with the insurance company of the other driver to pay for fixing his car. he believes that the other car was speeding and therefore the accident was the other driver's fault. He knows that you...

Homework Statement You are called as an expert witness to analyze the following auto accident: Car B, of mass 2100 kg, was stopped at a red light when it was hit from behind by car A, of mass 1400 kg. The cars locked bumpers during the collision and slid to a stop. Measurements of the skid...

Homework Statement This is a conceptual question for a lab. In the lab we used two gliders on a nearly frictionless airtrack on a level surface, with photogates set up to measure the velocities of the two gliders before and after the collisions. The second glider was initially stationary...

Forgive the probable incorrect use of words of physics, I'm not used to writing them in english :) Hope you will understand anyway. Object number 1 is moving horizontally (left to right) with Uniform rectilinear motion at the speed of 10.5 m/s. Its mass is 7.5 Kg. The coefficient of dynamic...

Homework Statement Two identical objects, each moving at 1m/s but in oposite directions collide partially inelastically in one dimension. Assume the final total kinetic energy is half the intial total value. Calculate the final speed of each object Homework Equations This is my...

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http://upload.wikimedia.org/math/a/8/a/a8a9e87d40533ad47fadb40725a4a3e5.png" How wxactly has this equation be derived? http://upload.wikimedia.org/math/3/c/5/3c53f3d1c66725053decc7e3e546c32d.png" Can someone help me with the derivation. I can't trace the orgin of the second part od the...