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Center of mass - Wikipedia, the free encyclopedia In the case of a loose distribution of masses in free space, such as shot from a shotgun, the position of the center of mass is a point in space among them that may not correspond to the position of any individual mass. The centre of mass of this figure is at a distance of 8.5 units from the left corner of the figure. The center of mass is often called the center of gravity because any uniform gravitational field g acts on a system as if the mass M of the system were concentrated at the center of mass R. en.wikipedia.org /wiki/Center_of_gravity   (2167 words)

Metacentric height - Wikipedia, the free encyclopedia The centre of buoyancy, is the centre of gravity of the volume of water which the hull displaces. The distance between the centre of gravity and the metacentre is called the metacentric height, and is usually between one and two metres. The righting force on the ship is then caused by gravity pulling down on the hull, effectively acting on its centre of gravity, and the buoyancy pushing the hull upwards; effectively acting along the vertical line passing through the centre of buoyancy and the metacentre above it. en.wikipedia.org /wiki/Metacentric_height   (801 words)

WWF: Center of Gravity Draft and centre of gravity derived from a revised payload. Hong et al (1) dealt with the Center of Gravity, briefly deriving a KG value (vertical distance from keel to centre of gravity) of D/3. The centroid (mass centre) of the cargo on each floor is taken at the level of the floor, which is not a good approximation. www.worldwideflood.com /ark/centre_of_gravity/Centre_of_gravity.htm   (741 words)

CENTRE OF MASS Centre of mass of a body is that point that moves when forces are applied on the body. Centre of mass of a square is at the point of intersection of its diagonals. Centre of mass of a sphere is at its centre. www.citycollegiate.com /centre_of_mass.htm   (426 words)

Encyclopedia :: encyclopedia : Center   (Site not responding. Last check: 2007-11-01) Major social or political movements often have one or more centers or headquarters around which they are focussed and from where they are directed. Centre is a low-lying region of France in the center of the country. In India, the Centre refers to federal (all-India) politics at New Delhi. www.hallencyclopedia.com /Center   (485 words)

Model Aircraft Glossary The centre of gravity may be assessed by balancing the aircraft on two finger tips placed either side of the fuselage. Gravity ensures that the ‘clunk’ is always at the bottom, enabling fuel to be collected whatever the orientation of the fuel tank. As the centre mass of a rotating body moves closer to the axis of rotation, the velocity of the body increases. www.glue-it.com /aircraft/general-information/glossary/c_summ.htm   (1336 words)

PlanetMath: centre of mass The term centre of gravity is sometimes used loosely as a synonym for the centre of mass, but these are distinct concepts; the centre of gravity is supposed to be a single point on which the force of gravity can be considered to act upon. As shown by the above examples, the centre of mass and its related concepts have applications in mechanics and other areas of physics. This is version 9 of centre of mass, born on 2005-08-15, modified 2005-08-31. planetmath.org /encyclopedia/CentreOfMass.html   (382 words)

Center of Gravity The center of gravity of a collection of masses is the point where all the weight of the object can be considered to be concentrated. The centre of gravity is not necessarily inside the object. The center of gravity of an extended body or system of masses is also distinguished by the fact that it will remain at rest or moving at constant velocity unless the body is acted on by a net external force. theory.uwinnipeg.ca /physics/rot/node4.html   (287 words)

Center of Gravity The center of gravity is the average location of the weight of an object. We can completely describe the motion of any object through space in terms of the translation of the center of gravity of the object from one place to another, and the rotation of the object about its center of gravity if it is free to rotate. In general, determining the center of gravity (cg) is a complicated procedure because the mass (and weight) may not be uniformly distributed throughout the object. www.grc.nasa.gov /WWW/K-12/airplane/cg.html   (665 words)

Understanding Centre Of Gravity   (Site not responding. Last check: 2007-11-01) The centre of gravity of an object is a point at or near the object through which the resultant weight of the object passes. For a rectangle or square, the centre of gravity occurs at the centre of the section. For a triangular section the centre of gravity occurs at a point 1/3 of the height from the base. www2.umist.ac.uk /construction/intranet/teaching/ul222/exp/cogex.htm   (283 words)

Centre of Gravity - Stability | TP 10038 | Marine Safety   (Site not responding. Last check: 2007-11-01) The centre of gravity (G) is the point at which the whole weight of the vessel can be said to act vertically downward. The centre of gravity changes, depending on how weight is distributed in the vessel. A vessel with a high centre of gravity is "top heavy." If it lists or heels to one side, the centre of gravity pushes down in the direction of the list. www.tc.gc.ca /marinesafety/tp/tp10038/26-stab-centre-of-gravity.htm   (187 words)

Demo: Gravity - Centre of Gravity To introduce the concepts of centre of gravity (cg) or centre of mass (cm) and the effects mass distribution has on objects rolling down a hill. The cg or the cm is the point on an object where all the gravitational attraction or weight of an object may be considered to be concentrated. Centre of gravity concepts are discussed in the grade 12 physics curriculum under the unit of Bodies in Equilibrium. educ.queensu.ca /~science/main/concept/phys/p04/p04dekf1.htm   (329 words)

Quantum Gravity Since the contemporary theory of gravity, general relativity, describes gravitation as the curvature of spacetime by matter and energy, a quantization of gravity implies some sort of quantization of spacetime itself. Loop quantum gravity is less plagued by a lack of predictions, and indeed it is often claimed that the discreteness of area and volume are concrete predictions of the theory. Indeed, it is a major challenge of loop quantum gravity to show that it has general relativity as a low-energy limit, and a major challenge of string theory to show that it has the standard model of particle physics plus general relativity as a low-energy limit. plato.stanford.edu /entries/quantum-gravity   (6049 words)

Couch Potato - Science   (Site not responding. Last check: 2007-11-01) Gravity is a force that pulls objects together. Gravity acts on all objects on the Earth. However, the centre of gravity is generally higher in males than females. www.abc.net.au /couch/s209907.htm   (246 words)

Exploratorium: Science Snacks: Center of Gravity Here is an easy way to find the center of gravity of a long, thin object, even if the object's weight is unevenly distributed. The stick's center of gravity is the place where you could balance the stick on just one finger. When you first support the stick with two fingers, in general one finger (the one that is closer to the center of gravity) will be holding a little more of the weight than the other. www.exploratorium.edu /snacks/center_of_gravity.html   (300 words)

Math Forum - Ask Dr. Math   (Site not responding. Last check: 2007-11-01) I remembered (vaguely) from geometry that the triangle has a point called the centre of gravity, and realised that it had to lie on each of the lines between a vertex and the mid way point of the opposite side. However, although this point is often described as a "Centre of Gravity", I can't find anything that shows it is a centre in the way I understand it, nor anything which explains that it isn't. It's simple: the center of gravity of a 2-dimensional figure is NOT defined as a point such that any straight line through the point divides the figure into two regions of equal area. mathforum.org /library/drmath/view/51844.html   (2266 words)

Centre of Gravity   (Site not responding. Last check: 2007-11-01) "Centre of gravity" was my post - not "center of mass" as these are not the same. However the gravity from 0.9 km mass will be G/0.9^2 and that from 1.1 km will be G/1.1^2 where G is a constant in both cases. Second is the center of gravity, which is the point in an object or system of objects for which its response to a gravitational field can be treated as the motion of a point particle. setiathome.ssl.berkeley.edu /sah/forum_thread.php?id=29383   (5879 words)

Centre of Gravity When all of these objects are combined a single centre of gravity point is created in a 3 dimensional space. The centre of gravity position between the front and rear axle is simply the weight distribution between the two. To calculate the height of the centre of gravity is a much more difficult task. members.fortunecity.com /suspdesign/centre_of_gravity.html   (188 words)

Unexplained Mysteries :: Scotland at centre of gravity revolution For one of the basic tenets of astronomy - the universal force of gravity - is now under serious challenge from a radical, competing theory which in the words of one observer threatens to "open Pandora's Box". Dr HongSheng Zhao, of St Andrews, and his Belgian collaborator Dr Benoit Famaey believe that gravity actually changes depending on where it is in the universe, and have thrown down a challenge for their doubters to prove them wrong. The further away something is from the source of the gravity, the less powerful it is. At the edges of the universe, the force is so weak it is known as "nano-gravity". www.unexplained-mysteries.com /viewnews.php?id=62128   (476 words)

gravitys_centre - Gravity's Centre - Pictures "Gravity's Centre" is a modern day Harry Potter RPG taking place after the War against the Dark Lord Voldemort. The Wizarding World is recovering from several years of civil war between The Army of The Light and Voldemort's army of Death Eaters and Dark Creatures. Minerva McGonagall is reopening Hogwarts and people are coming home once more, to the place that brought them all together and even now continues to be their centre of gravity. www.greatestjournal.com /userinfo.bml?user=gravitys_centre   (251 words)

centre - Wiktionary (point in the interior of figure with mean coordinates): centroid, centre of gravity, centre of mass To cause (an object) to occupy the centre of an area. To cause (some attribute, such as a mood or voltage) to be adjusted to a value which is midway between the extremes. en.wiktionary.org /wiki/centre   (399 words)

Where is the world's population centre of gravity? | Ask MetaFilter prompted by an article stating that Christianity's new "centre of gravity" is in Timbuktu (in the largely Muslim country of Mali) - the geographical point at which an equal number of Christians lives to the north, south, east and west. In truth, the human population's center of gravity is most likely somewhere inside the earth. Whether you use their definition or a proper one, the data used to make these population density maps is probably a pretty good place to start. ask.metafilter.com /mefi/15760   (705 words)

KAP: Center of Balance Note the offset from the tripod mount in X and Y when the camera is level as the camera's centre of gravity. Make sure that all additional elements are centred along the centre line of the bracket, this will ensure you introduce minimal errors in the Y balance. Once you have drilled the holes for the pivot of the bottom bracket (remember these should go through the centre line of the bracket), hang the bottom bracket in it's correct orientation by a single line passing through both holes. www.gentles.info /KAP/rig02/centerofgravity.htm   (990 words)

Scotland at centre of gravity revolution - Unexplained Mysteries Discussion Forums This makes the extra mass provided by dark matter, which Dr Zhao describes as "an assumption", unnecessary for there to be the kind of gravity that keeps galaxies together. Newtonian physics can be used to predict the movement of the planets successfully, but the problem comes when it is used to calculate the movement of stars. Nice story, but those stars arn't lost from the end of a spiral arm, they are flung from the galaxies centre which is different entirely. www.unexplained-mysteries.com /forum/index.php?showtopic=62128   (729 words)

Centre of gravity algorithm? - GameDev.Net Discussion Forums   (Site not responding. Last check: 2007-11-01) Posted - 6/2/2003 11:25:21 AM Well thank you but that doesn't cover me.I want the centre of gravity since I don't know the mass of the object.Anyway, good links for math algorithms will help also. Posted - 6/7/2003 1:11:10 PM The problem with non-uniform gravity fields is that the CG of the object is a function of its position, so it's not a very useful concept. I know all about center of mass, but I can't really think of a situation where center of gravity has any real advantages, except maybe for NASA dudes. www.gamedev.net /community/forums/topic.asp?topic_id=160530   (966 words)

KMC Forums - Centre of gravity on the Death Star In Ep 4 when the Falcon gets tractor beamed into the hangar it docks side on into the DeathStar which would make the "gravity-pull" from the top down to the bottom of the station. But if the centre of the gravity-pull was in the middle of the Death Star this would mean that the Falcon docked front-end-on into the hanger (with the ass up in the air)which means when the occupants disembarked the ship they wouldve fallen inwards towards the centre of the station. Gravity + Star Wars = no sense = doesn't remotely matter. www.killermovies.com /forums/f6/t346163.html   (500 words)

The Gravity Discovery Centre - Discover Science, Astronomy, The Universe and the Stars. The Gravity Discovery Centre - Discover Science, Astronomy, The Universe and the Stars. The GDC is an inspirational self supporting, non-profit public education and tourism centre that focusses on the big questions of Life and the Universe, and the extraordinary biodiversity of Wallingup Plain. The GDC is situated alongside the Australian International Gravitational Observatory (AIGO) on Military Road in the Shire of Gingin, just north of Yanchep. www.gdc.asn.au   (269 words)

BIPM - finding the centre of gravity Finding the centre of gravity of a mass standard Mettler HK1000MC balance, housed in an air-tight enclosure, used for calibrations Heterodyne refractometer used to monitor air density variations www.bipm.fr /en/scientific/mass/pictures_mass/centre_of_gravity.html   (110 words)

Measuring the Vertical Displacements of the Centre of Gravity of a Levitated Superconducting Body Measuring the Vertical Displacements of the Centre of Gravity of a Levitated Superconducting Body Directly comparing the "mechanical" with the "electrical" joule by the levitated mass method implies accurately measuring the vertical displacement of the centre of gravity of a levitated superconducting body. In particular, reselling and systematic downloading of files is prohibited. stacks.iop.org /0026-1394/31/1   (275 words)

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