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Topic: Elastic collision

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Kinetic theory of gases

Ideal gas

Root mean square

Nitrogen

Rivers of Asia

	Elastic and Inelastic Collisions
		Collisions in ideal gases approach perfectly elastic collisions, as do scattering interactions of sub-atomic particles which are deflected by the electromagnetic force.
		An elastic collision is defined as one in which both conservation of momentum and conservation of kinetic energy are observed.
		Collisions in ideal gases are very nearly elastic, and this fact is used in the development of the expressions for gas pressure in a container.
	hyperphysics.phy-astr.gsu.edu /hbase/elacol.html (403 words)

	Car and Truck Collide Head-on (elastic)
		Elastic collisions are collisions in which both momentum and kinetic energy are conserved.
		After the collision, the momentum of the car is -40000 kgm/s and the momentum of the truck is 0 kgm/s; the total system momentum is -40000 kg*m/s.
		A collision such as this in which total system kinetic energy is conserved is known as an elastic collision.
	www.glenbrook.k12.il.us /gbssci/phys/mmedia/momentum/cthoe.html (377 words)

	Elastic collision - Wikipedia, the free encyclopedia
		An elastic collision is a collision in which the total kinetic energy of the colliding bodies after collision is equal to their total kinetic energy before collision.
		Elastic collisions occur only if there is no conversion of kinetic energy into other forms, as in the collision of atoms (Rutherford backscattering is one example).
		Collisions that are not elastic are known as inelastic collisions.
	en.wikipedia.org /wiki/Elastic_collision (600 words)

	The Physics Classroom
		Before the collision, the momentum of the truck is 60 000 kgm/s and the momentum of the car is 0 kgm/s; the total system momentum is 60 000 kg*m/s.
		After the collision, the momentum of the truck is 30 000 kgm/s and the momentum of the car is 30 000 kgm/s; the total system momentum is 60 000 kg*m/s.
		After the collision, the total system kinetic energy is 600 000 Joules (150 000 J for the truck and 450 000 J for the car).
	www.physicsclassroom.com /mmedia/momentum/trece.html (413 words)

	Momentum and Collisions
		An elastic collision is one in which momentum and kinetic energy are conserved during the collision.
		The coefficient of restitution, c, is a measure of the elasticity of the collision between two colliding objects.
		Elasticity is a measure of how much bounce there is, or in other words, how much of the kinetic energy of the colliding objects before the collision remains as kinetic energy of the objects after the collision.
	www.ferris.edu /htmls/academics/course.offerings/baconc/Momentum.htm (989 words)

	Elastic and Inelastic Collision (Site not responding. Last check: 2007-10-24)
		This Java applet deals with the extreme cases of a collision process illustrated by two wagons: For an elastic collision it is characteristic that the sum of the kinetic energies of the involved bodies is constant.
		After a perfectly inelastic collision, however, both bodies have the same velocity; the sum of their kinetic energies is reduced, compared with the initial value, because a part of it has changed into internal energy (warming up).
		The movement of the common center of gravity (indicated by a yellow dot) is not influenced by the collision process.
	www.walter-fendt.de /ph11e/collision.htm (219 words)

	SparkNotes: Collisions: Collisions in One Dimension
		A typical collision problem involves two particles with known initial velocities colliding; we are required to calculate the final velocity of each object.
		Formally, an elastic condition is one in which kinetic energy is conserved.
		In this case, called a completely inelastic collision we only need to solve for one final velocity, and the conservation of momentum equation is enough to predict the outcome of the collision.
	www.sparknotes.com /physics/linearmomentum/collisions/section1.html (727 words)

	Physics - Collision
		A collision in which the total kinetic energy after the collision is less than that before the collision is called an inelastic collision.
		An inelastic collision in which the bodies stick together and move as one body after the collision is often called a completely inelastic collision.
		As aforementioned, an elastic collision in an isolated system is a collision in which kinetic energy (as well as momentum) is conserved.
	www.brainycreatures.org /physics/collision.asp (1261 words)

	[No title]
		If the kinetic energy of the bodies involved in a collision is the same before and after impact, the collision is said to be a perfectly elastic collision.
		Although mechanical energy is never completely conserved in any collisions between real bodies, momentum always is. Two equal lumps of putty traveling at equal speeds in opposite directions will stick together and come to rest when they collide, thus using up all their KE in the work of rubbing putty particles against one another.
		In a head-on perfectly elastic collision between particles, the relative speed of approach before collision is equal to the relative speed of separation after collision.
	www.physics.csbsju.edu /RPEG/special/mall_search.6.dat (3771 words)

	Collision - Wikipedia, the free encyclopedia
		Collisions can be elastic, meaning they conserve energy and momentum, inelastic, meaning they conserve momentum but not energy, or totally inelastic (or plastic), meaning they conserve momentum and the two objects stick together.
		Because the collisions between billiard balls are nearly elastic, and the balls roll on a low-friction surface, their predictable behaviour is often used to illustrate Newton's laws of motion.
		In traffic such a collision can be between two vehicles, a vehicle and a person, a vehicle and an object, two persons or a person and an object (and more if an animal is involved).
	en.wikipedia.org /wiki/Collision (273 words)

	Elastic and Inelastic Collision
		This Java applet deals with the extreme cases of an collision process illustrated by two wagons: For an elastic collision it is characteristic that the sum of the kinetic energies of the involved bodies is constant.
		After a perfectly inelastic collision, however, both bodies have the same velocity; the sum of their kinetic energies is reduced, compared with the initial value, because a part of it has changed into internal energy (warming up).
		The movement of the common center of gravity (indicated by a yellow dot) is not influenced by the collision process.
	physics.uwstout.edu /physapplets/a-city/physengl/collision.htm (219 words)

	VP: ONE DIMENSIONAL COLLISIONS (Site not responding. Last check: 2007-10-24)
		Where the coefficient of restitution for a perfectly elastic collision is e = 1 and for a perfectly inelastic collision is e = 0.
		From the "PASCO" subdirectory chose one of the following: For elastic collisions pasco17, pasco18, pasco19, pasco20, pasco21, pasco22, pasco78, pasco79, pasco80, or pasco81; and for inelastic collisions pasco24, pasco25, pasco26, pasco27, pasco28, pasco29, pasco30, pasco82, pasco83, pasco84, pasco85, pasco86, or pasco87.
		Calculate the final velocities assuming the collision is elastic or inelastic as the case may be.
	www.nv.cc.va.us /home/nvmajew/phy241/labs/lab6.html (1091 words)

	Glossary - E (Site not responding. Last check: 2007-10-24)
		A collision of particles wherein the resultant sum of kinetic energies of the particles remains the same after collision as before.
		the elastic collision between a fast neutron and nucleus of a hydrogen atom (proton) is the predominant means by which the neutron loses energy to reach epithermal or thermal energy levels.
		Elastic collision and the resulting elastic scattering is important in neutron-logging methods involving neutron-neutron interactions.
	www.spwla.org /library_info/glossary/reference/glosse/glosse.htm (2792 words)

	Physics 125 Lecture 15
		Hockey and football are sports for which the collisions of two or more players is as important as collisions of foot with ball or stick with puck.
		A very straightforward elastic collision is one for which two equal mass objects are moving toward each other with velocities of equal magnitude and opposite direction.
		This special elastic collision can be used to predict the outcome of other elastic collisions of equal mass objects by considering the collision in a moving reference frame.
	www.umich.edu /~amophys/125/fift/fift.html (869 words)

	Elastic Collision Between Different Masses (Site not responding. Last check: 2007-10-24)
		Determine the velocity of each disk immediately after the collision and show that the total kinetic energy is the same before and after the collision.
		The coefficient of restitution, Cr, is the ratio of the velocity of separation to the velocity of approach in a collision.
		In the case of an elastic collision it is 1.0.
	www.mcasco.com /qa_ecbdm.html (373 words)

	Elastic Collisions
		Figure 10.2: One-dimensional elastic collisions of two particles in the center of momentum frame as seen in spacetime diagrams.
		The left panel of figure 10.2 shows what happens in a collision when the masses of the two colliding particles are equal.
		Suppose we wish to view the results of an elastic collision in a reference frame in which particle 2 is initially stationary.
	www.physics.nmt.edu /~raymond/classes/ph13xbook/node107.html (338 words)

	Momentum & Energy (Site not responding. Last check: 2007-10-24)
		The real questions should be, "Is the real outcome of this collision more like the first hypothetical outcome or the second?" Experimental observation confirms that the collisions between bowling balls are more like elastic collisions than inelastic collisions.
		In general, the collision between bowling balls is more like an elastic collision than an inelastic one.
		Determine the final velocities of two objects after a one dimensional (head on) elastic collision in terms of the objects' masses and initial velocities.
	hypertextbook.com /physics/mechanics/momentum-energy (2180 words)

	Untitled Document
		An elastic collision is one in which the total kinetic energy of the system after the collision is equal to the total kinetic energy before the collision.
		The second type of collision is called an inelastic collision.
		An inelastic collision is one in which the total kinetic energy of the system is not the same before and after the collision.
	www.unc.edu /~molitor (255 words)

	Director Online Article: The Physics of an Elastic Collision (Part 2)
		The collision angle is the angle made by drawing a line between the center of the two colliding objects (we'll only deal with round things in this article).
		The first case is due to particles which have slow velocities after a collision (in your code they are still close together after the collision), and the second case is due to the fact that you are not checking for separation distances frequently enough.
		In order to deal with internal collisions a frame script can be used to check for collisions (by looking for the distance between two particles) on each exitFrame, deal with the collision when particles first overlap, and then keep track of which particles have not yet separated.
	director-online.com /buildArticle.php?id=532 (2315 words)

	Two-Dimensional Collisions
		There are two types of collisions, elastic and inelastic.
		In elastic collisions both kinetic energy and momentum are conserved.
		If the collision is not head-on there may be some rotation involved which would complicate the system.
	www.stkate.edu /physics/phys111/curric/2dcollisions.html (548 words)

	Elastic Collision in Two Dimensions
		Firstly a note in order to avoid any misunderstandings: the exact kinematics of a particle collision is rarely of interest in plasma physics as it is impractical to track a large number of particles individually.
		This is achieved as follows: using the law of cosines for the collision triangle and solving the corresponding quadratic equation for the distance which ball 1 travels to the collision point, one obtains the time that elapses from the original coordinates to the collision as
		The elastic collision in 3 dimensions can be derived in a similar way, with the only difference that now two 'impact angles' need to be defined to determine all the velocity components.
	www.plasmaphysics.org.uk /collision2d.htm (718 words)

	Director Online Article: The physics of an elastic collision: Part I
		After the collision the total momentum must be equal to 5000 due to the Law of Momentum Conservation.
		In an elastic collision the kinetic energy is conserved: the initial kinetic energy of the system is equal to the final kinetic energy.
		The other term I've used throughout this article is "collision." We will have to detect the collision (the time when particles touch for the first time), and we will have to tell the particles what their new velocities should be after the collision.
	director-online.com /buildArticle.php?id=460 (1691 words)

	Worked example 6.5: Elastic collision
		Given that the collision is elastic, what are the final velocities of the two objects.
		Since the collision is elastic, the total kinetic energy must be the same before and after the collision.
		The minus sign indicates that this object reverses direction as a result of the collision.
	farside.ph.utexas.edu /teaching/301/lectures/node82.html (89 words)

	Collision -- from Eric Weisstein's World of Physics
		In a conservative two body collision, both kinetic energy and momentum are conserved.
		Coefficient of Restitution, Collision Coefficient, Conservation of Momentum, Elastic Collision, Inelastic Collision
		Mott, N. and Massey, H. The Theory of Atomic Collisions, 3rd ed.
	scienceworld.wolfram.com /physics/Collision.html (67 words)

	Collisions and Conservation (Site not responding. Last check: 2007-10-24)
		An elastic collision is one in which all the kinetic energy the colliding bodies possess (that is, energy due solely to their motion), is the same before, during, and after the collision takes place.
		The idea of an elastic collision is an invention, a tool, a useful construct that mathematicians and scientists use to keep tabs on change in the universe.
		Perhaps the closest thing to a perfectly elastic collision that can be observed by Earthlings under normal conditions of temperature and pressure is a collision between two atoms in a gaseous state.
	eee.uci.edu /clients/bjbecker/RevoltingIdeas/collisions.html (1190 words)

	The Open Door Web Site : IB Physics : Collisions
		Different collisions were observed but in each case mobile B was initially stationary.
		Detailed study of totally non-elastic collisions is quite easy because there is only one speed to measure after the collision.
		The speed of A and B together was measured after the collision.
	www.saburchill.com /physics/chapters/0009.html (284 words)

	[No title]
		An experiment in elastic 2-d collision between disk A and disk B is shown below.
		The elastic collision between the two identical disks A and B takes place in a plane.
		The table on which the collision occurs is frictionless for the purpose of the experiment.
	phycomp.technion.ac.il /~psa/elastic.html (346 words)

	[No title] (Site not responding. Last check: 2007-10-24)
		"alpha" is a measure of the elasticity of a collision.
		An alpha value of one indicates an elastic collision, in which no kinetic energy is lost.
		An alpha value of zero is a prefectly inelastic collision, in which the two colliding objects stick together after colliding.
	www.msu.edu /user/brechtjo/physics/airTrack/airTrack.html (170 words)

	SparkNotes: SAT Physics: Collisions
		Kinetic energy is conserved in elastic collisions, whereas kinetic energy is converted into other forms of energy during an inelastic collision.
		Most collisions are inelastic because kinetic energy is transferred to other forms of energy—such as thermal energy, potential energy, and sound—during the collision process.
		You may be asked to identify a collision as inelastic, but you won’t be expected to calculate the resulting velocities of the objects involved in the collision.
	www.sparknotes.com /testprep/books/sat2/physics/chapter9section4.rhtml (1092 words)

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