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Topic: Conservation of momentum

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	Momentum - Wikipedia, the free encyclopedia
		In physics, momentum is a physical quantity related to the velocity and mass of an object.
		For example the momentum of a 5 kg bowling ball would have to be described by the statement that it was moving westward at 2 m/s.
		Massless objects such as photons also carry momentum; the formula is p=E/c, where E is the energy the photon carries and c is the speed of light.
	en.wikipedia.org /wiki/Momentum (1072 words)

	Conservation of Momentum
		The conservation of momentum is a fundamental concept of physics along with the conservation of energy and the conservation of mass.
		Momentum is defined to be the mass of an object multiplied by the velocity of the object.
		The conservation of momentum states that, within some problem domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton's laws of motion.
	www.grc.nasa.gov /WWW/K-12/airplane/conmo.html (853 words)

	Momentum Conservation Principle
		For any collision occurring in an isolated system, momentum is conserved - the total amount of momentum of the collection of objects in the system is the same before the collision as after the collision.
		A vector diagram can be used to represent this principle of momentum conservation; such a diagram uses an arrow to represent the magnitude and direction of the momentum vector for the individual objects before the collision and the combined momentum after the collision.
		Momentum is conserved for any interaction between two objects occurring in an isolated system.
	www.glenbrook.k12.il.us /gbssci/phys/Class/momentum/u4l2b.html (1810 words)

	Momentum
		Momentum is a physics term; it refers to the quantity of motion that an object has.
		In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.
		The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.
	www.glenbrook.k12.il.us /gbssci/phys/Class/momentum/u4l1a.html (906 words)

	Conservation of Momentum - Wikibooks
		Momentum is a property of an object that we are able to measure by a very simple means.
		Momentum is an extension of Newton's First Law in that a body with momentum will conserve that momentum, be it zero or non-zero.
		Conservation of Momentum, therefore, is by definition a zero change in the momentum of a system of objects.
	en.wikibooks.org /wiki/Conservation_of_Momentum (248 words)

	generic document for building HyperPhysics
		The conservation of energy principle is one of the foundation principles of all science disciplines.
		The angular momentum is a vector quantity and the vector sum of the angular momenta of the parts of an isolated system is constant.
		Conservation of Momentum: the mass times the velocity of the center of mass is constant.
	hyperphysics.phy-astr.gsu.edu /hbase/conser.html (631 words)

	Conservation of momentum (Site not responding. Last check: 2007-10-07)
		Creation of Momentum With this model, momentum is created during the interaction between radiation and matter, without the prior existence of momentum in the radiation.
		Momentum Webpage of Kathleen and Kristine Dougherty and their mother/daughter flute and french horn chamber ensemble, Momentum.
		Momentum Traders Network Evaluates premarket momentum and unusual activity to build a short list of stocks before the opening bell.
	www.serebella.com /encyclopedia/article-Conservation_of_momentum.html (356 words)

	conservation of momentum (Site not responding. Last check: 2007-10-07)
		There are more subtle conservation laws in particle physics like those of spin, baryon number and more recently strangeness.
		For instance, time-invariance implies that energy is conserved, translation-invariance implies that momentum is conserved, and rotation-invariance implies that angular momentum is conserved.
		In fact, quantities that are conserved, the invariants, seem to preserve what one would like to call some kind of a 'physical reality' and seem to have a more meaningful existence than many other physical quantities.
	www.yourencyclopedia.net /conservation_of_momentum.html (299 words)

	The Physics Classroom
		For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.
		But the impulse experienced by an object is equal to the change in momentum of that object (the impusle-momentum change theorem).
		Yet, the total momentum of the two objects (object 1 plus object 2) is the same before the collision as it is after the collision; the total momentum of the system (the collection of two objects) is conserved.
	www.physicsclassroom.com /Class/momentum/U4L2b.html (2063 words)

	momentum. The Columbia Encyclopedia, Sixth Edition. 2001-05
		Momentum is a vector quantity; i.e., it has both a magnitude and a direction, the direction being the same as that of the velocity vector.
		This conclusion is commonly known as the principle of the conservation of momentum (see conservation laws, in physics).
		The angular momentum of a particle rotating about a point is equal to the product of the mass of the particle, its angular velocity, and the square of its distance from the axis of rotation.
	www.bartleby.com /65/mo/momentum.html (371 words)

	Miss Glover's AP Physics Class (Site not responding. Last check: 2007-10-07)
		The linear momentum of an objext of mass M, moving with a velocity of V is defined as the product of the mass and the velocity.
		Impulse momentum is also a large part of Chapter 6, the impulse of a force acting on an object is equal to the product the force and the change in time.
		Conservation of momentum is applied to a system of two interacting objects and says that if no external forces act on the system, the total momentum of the system before the collision is equal to the total momentum of the system after the collision.
	www.spunge.org /~qwerty/chp6_summary.html (185 words)

	momentum, conservation of -- Encyclopædia Britannica
		Momentum is equal to the product of the mass of an object multiplied by its velocity and is equivalent to the force required to bring the object to a stop in a unit...
		The angular momentum of a particle of mass m moving with velocity v at the instant when it is at a distance r from the fixed point is mrv.
		Conservation is the preservation and maintenance of the environment to meet human needs for production while insuring that proper consideration is also given to aesthetics and recreation.
	www.britannica.com /eb/article-9053290?&query=conservation (850 words)

	[No title] (Site not responding. Last check: 2007-10-07)
		the momentum of a syatem remains constant in the absence of external force.
		Momentum is a property that all moving objects have.
		When two moving objects collide together the momentum before the collision is the same as after the collision.
	www.fearofphysics.com /w.php?define=conservation (150 words)

	Science 122 Program 18 Momentum & Conservation
		When momentum is defined this way, as Newton defined it, "the quantity of motion", it becomes apparent that the force required to stop a moving mass depends on its momentum, not on the mass or the velocity alone.
		Although conservation of momentum has only limited practical usefulness, if any in our everyday world, it is important to our study of the heritage of ideas for several reasons.
		We saw howthe concept of conservation of momentum is related to symmetry, and how it can predict the behavior of many kinds of interactions, from collisions and explosions, to the motion of the planets in their elliptical orbits.
	honolulu.hawaii.edu /distance/sci122/Programs/p18/p18.html (1685 words)

	Conservation of Momentum (Site not responding. Last check: 2007-10-07)
		This is called the principle of conservation of momentum, and is useful in solving problems in dynamics (the physics and mathematics of moving objects).
		, the equation for the conservation of momentum is
		Second law: The rate of change of momentum of a body is proportional to the force applied to that body and in the direction of the force.
	www.physchem.co.za /Motion/Momentum.htm (288 words)

	Lesson #28b Momentum
		One useful consequence of Newton's 3rd law is the conservation of momentum, as is shown by analyzing the recoil of a cannon.
		The concepts of rocket motion (#25) and of planetary gravity-assist maneuvers (#34), which are usually presented as applications of the conservation of momentum, were covered there in different ways, using the concepts of centers of gravity and of frames of reference.
		For the equations of the conservation of momentum, the units are not important, as long as the same ones are used before and after the collision (i.e.
	www-spof.gsfc.nasa.gov /stargaze/Lmoment.htm (1565 words)

	Conservation Of Momentum Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-07)
		Noether's theorem expresses the equivalence which exists between conservation laws and the invariance of physical laws with respect to certain transformations (typically called "symmetries") for systems which obey the Principle of least action and hence having a Lagrangian and a Hamiltonian (See Classical mechanics, Hamiltonian mechanics for details).
		For instance, time invariance implies that energy is conserved, translation invariance implies that momentum is conserved, and rotation invariance implies that angular momentum is conserved.
		In fact, quantities that are conserved, the invariants, seem to preserve what some would like to call some kind of a 'physical reality' and seem to have a more meaningful existence than many other physical quantities.
	www.stardustmemories.com /encyclopedia/Conservation_of_momentum (467 words)

	conservation law concept from the Astronomy knowledge base
		conservation of angular momentum (4 facts) - The principle that the angular momentum of a system (the momentum of rotation about a point) remains the same as long as no external torque acts., The total angular momentum of an isolated dynamical system does not change during the course of its evolution.
		conservation of mass and energy (3 facts) - Important physical principle and one of the basic laws of physics stating that matter is neither created nor destroyed (although mass may become energy, the energy quantitatively represents the mass).
		conservation of momentum (3 facts) - The principle that the linear momentum of a system (in Newtonian mechanics, mass times velocity) remains the same as long as no external force acts.
	www.site.uottawa.ca:4321 /astronomy/conservationlaw.html (373 words)

	Linear Momentum and Collisions
		This idea that in the absence of external forces the momentum remains constant is called the principle of the "conservation of linear momentum".
		Using the conservation of linear momentum and the conservation of mechanical energy, we may determine from the before collision conditions what the conditions will be after the collision without ever knowing exactly what went on during the collision.
		Since momentum is a vector quantity, in two dimensions, conservation of momentum gives us two equations, one in x and one in y.
	www.mcasco.com /p1lmc.html (2085 words)

	Momentum
		Momentum is the measure of how difficult it is to change an objects' velocity.
		Momentum can be increased by increasing the mass of the object or the velocity of the object.
		Conservation of momentum just shows that momentum is never lost but just transferred from one object to another e.g.
	www.projectgcse.co.uk /physics/momentum.htm (120 words)

	Conservation of Momentum
		Momentum is conserved in any collision if the effect of any external forces present is negliable relative to the effect of the collision.
		This is the statement of the conservation of momentum.
		Momentum is a vector, and each component is conserved separately.
	theory.uwinnipeg.ca /physics/mom/node3.html (91 words)

	Conservation of momentum (Site not responding. Last check: 2007-10-07)
		There are more subtle conservation laws in particle physics likethose of spin, baryon number andmore recently strangeness.
		For instance, time-invariance implies that energyis conserved, translation-invariance implies that momentum is conserved, and rotation-invariance impliesthat angular momentum is conserved.
		In fact, quantities that are conserved, the invariants, seem topreserve what one would like to call some kind of a 'physical reality' and seem to have a more meaningful existence than manyother physical quantities.
	www.therfcc.org /conservation-of-momentum-117023.html (256 words)

	conservation of momentum - Hutchinson encyclopedia article about conservation of momentum
		In mechanics, a law that states that total momentum is conserved (remains constant) in all collisions, providing no external resultant force acts on the colliding bodies.
		The principle may be expressed as an equation used to solve numerical problems: total momentum before collision = total momentum after collision.
		This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
	encyclopedia.farlex.com /conservation+of+momentum (122 words)

	Momentum (Site not responding. Last check: 2007-10-07)
		Momentum is a vector quantity, meaning it has magnitude and direction.
		Therefore, a greater change in momentum is involved in stopping a train than in stopping the car.
		In case of the bullets, the greater momentum of the fired bullet is due to its greater velocity; a large change in momentum takes place when the speeding bullet is stopped.
	library.thinkquest.org /27948/momentum.html?tqskip1=1 (189 words)

	The Biomechanics of Skating: Conservation of Angular Momentum
		For example, it is important to understand the concepts of force, angular displacement, angular velocity, and momentum to fully comprehend the analysis of the figure skating jumps and spins.
		The objectives of this unit is to use example from figure skating to become familiar with the concept of conservation of angular momentum, to be able to solve basic angular momentum problems, and to learn great examples from figure skating for teaching the conservation of angular momentum to your students.
		Conservation of angular momentum is the principle that the angular momentum of an object remains constant as long as no external torque, or moment, acts on that object.
	btc.montana.edu /olympics/physbio/biomechanics/cam-intro.html (343 words)

	Interactive Physics: Momentum
		Momentum can only be changed by changing the object's velocity or its mass.
		Momentum depends on two thing, mass and velocity, but both have set masses, so it's up to you to change the velocities.
		If the difference is positive, then the Rams player had more momentum, etc. Then I just divided the new momentum by the combined mass of the two players (since one is holding on to the other).
	www.jracademy.com /~jtucek/physics/momentum.html (508 words)

	January 7, 1997 (Site not responding. Last check: 2007-10-07)
		However, to ensure that the envisioned methods are consistent with firmly established physics, the analysis imposes the constraints of conservation of momentum and energy, and requires that observed natural phenomena are not contradicted.
		Regarding conservation of energy, this condition can be satisfied by imposing the constraint that whatever propulsive method or phenomenon is used, the total system energy before and after the propulsive effect is equal.
		Conservation of momentum requires that the momentum imparted to the vehicle must be equal and opposite to the momentum imparted to a reaction mass.
	www.lerc.nasa.gov /WWW/bpp/TM-107289.htm (5332 words)

	Symmetries and Conservation Laws (Site not responding. Last check: 2007-10-07)
		Energy conservation is a direct consequence of the fact that the laws of nature do not change with time.
		Similarly, momentum conservation derives from the simple fact that the laws of physics do not change as you move from one place to another.
		This conserved quantity is called angular momentum and arises, naturally, in the context of rotational motion of objects, which is the subject of the next Chapter.
	theoryx5.uwinnipeg.ca /mod_tech/node40.html (190 words)

	Conservation of Linear Momentum (Site not responding. Last check: 2007-10-07)
		Linear momentum is the tendency of an object moving in a certain direction to keep going at the same speed in the same direction.
		Because of the conservation principle, we can write a before and after equation, setting the sum of momenta of the racquet and ball before the collision equal to the sum of momenta after the collision.
		In the case of an eccentric impact such as this, there is a steadying force exerted by the player to keep the axis of rotation of the racquet from moving during the impact.
	www.racquetresearch.com /linmom.htm (375 words)

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