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Topic: Hookes law


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In the News (Mon 16 Nov 09)

  
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twilighthaven.net /menu/school.htm   (781 words)

  
  Generalized Hooke's Law > ENGINEERING.com > ENGINEERING.com | Articles
The generalized Hooke's Law can be used to predict the deformations caused in a given material by an arbitrary combination of stresses.
For example, if the member is experiencing a load in the y-direction (which in turn causes a stress in the y-direction), the Hooke's Law shows that strain in the x-direction does not equal to zero.
This is because as material is being pulled outward by the y-plane, the material in the x-plane moves inward to fill in the space once occupied, just like an elastic band becomes thinner as you try to pull it apart.
engineering.com /Library/ArticlesPage/tabid/85/articleType/ArticleView/articleId/208/Generalized-Hookes-Law.aspx   (161 words)

  
 Tensile Testing Tension Testing Tensile Test Tension Test
For most tensile testing of materials, you will notice that in the initial portion of the test, the relationship between the applied force, or load, and the elongation the specimen exhibits is linear.
In this linear region, the line obeys the relationship defined as "Hooke's Law" where the ratio of stress to strain is a constant, or
At the point that the curve is no longer linear and deviates from the straight-line relationship, Hooke's Law no longer applies and some permanent deformation occurs in the specimen.
www.instron.se /wa/applications/test_types/tension   (760 words)

  
 Clark and Toop - Compensation Lawyers :: News and Opinion
He is accredited with the Law Institute of Victoria as a personal injury specialist.
Reported in The Age: - - Bash victim says Hookes death gave him nightmares - Author: Ian Munro - Date: 08/05/2004 - Publication: The Age - Section: News - Page: 5 - - Result subject to confidentiality.
There is no crueler tyranny than that which is perpetrated under the shield of law and in the name of justice.
compolaw.com.au /compensation-law/news/30.html   (276 words)

  
  Mechanics of Materials: Hooke's Law   (Site not responding. Last check: )
where F is the applied force (and not the power, as Hooke mistakenly suggested), u is the deformation of the elastic body subjected to the force F, and k is the spring constant (i.e.
Cauchy generalized Hooke's law to three dimensional elastic bodies and stated that the 6 components of stress are linearly related to the 6 components of strain.
The stress-strain relationship written in matrix form, where the 6 components of stress and strain are organized into column vectors, is,
www.efunda.com /formulae/solid_mechanics/mat_mechanics/hooke.cfm   (219 words)

  
  CNN.com - Man charged in cricket star death - Jan. 19, 2004
Hookes died Monday after being was allegedly punched by Zdravco Micevic during a brawl late Sunday night outside a hotel in the southern Australian city of Melbourne.
Hookes, known for his straight-shooting style, overheard a remark made towards the girlfriend of one of his players by a hotel crowd controller.
Hookes is believed to have shared a few sharp words with a man before departing at closing with a group of about 10 friends, The Australian Associated Press reports.
www.cnn.com /2004/WORLD/asiapcf/01/19/cricket.hookes   (395 words)

  
 Physics tutorial: Hooke's Law
Hooke’s Law states that the amount of deformation of an elastic object is proportional to the force applied to deform it.
The concept of Hooke’s Law is that the amount of force applied to a spring or elastic object is proportional to the amount of deformation (length of stretch or compression).
The formula for Hooke’s Law is F=kx where “F” is the force applied, “k” is the force constant of the spring, and “x” is the amount of deformation in meters.
www.physics247.com /physics-tutorial/hookes-law.shtml   (292 words)

  
 Bouncer 'threatened Hookes': witness - National - www.theage.com.au
Hookes, 48, was celebrating with Victorian and South Australian cricketers on the night after a game at the MCG.
A member of Hookes' group on the night, Tania Plumpton, told the court she grabbed a bouncer's arm when he put Hookes in a headlock while ejecting him from the bar.
In a statement tendered to the court, she said Hookes told the bouncer: "that it was no way to speak to a lady'' and a bouncer grabbed him in a headlock and started to eject him from the bar.
www.theage.com.au /news/National/Bouncer-threatened-Hookes-witness/2004/11/18/1100718140399.html?from=storylhs   (577 words)

  
 NationMaster - Encyclopedia: Shear modulus
All of them arise in the generalized Hooke's law.
Young's modulus describes the material's response to linear strain (like pulling on the ends of a wire), the bulk modulus describes the material's response to uniform pressure, and the shear modulus describes the material's response to shearing strains.
In physics, Hookes law of elasticity states that if a force (F) is applied to an elastic spring or prismatic rod (with length L and cross section A), its extension is linearly proportional to its tensile stress σ and modulus of elasticity (E): ΔL = 1/E × F × L/A...
www.nationmaster.com /encyclopedia/Shear-modulus   (513 words)

  
 Can Hooke's Law Really be Explained by Molecular Forces?   (Site not responding. Last check: )
Hooke's Law states that the elongation (strain) of elastic materials is proportional to the applied force.
This is primarily a purely empirical macroscopic law which holds only up to a certain relative extension of the object, after which the behaviour becomes plastic and eventually the object fractures (see Fig.3 in Reference1).
Hooke's law would hold up to a strain of 10%, in contradiction to experiments.
www.physicsmyths.org.uk /hooke.htm   (606 words)

  
 hooke's law / All About Law
The general law of mechanics that stress is directly proportional to strain (1) where is a constant of proportionality known as the shear modulus.
This equation is known as Hooke's Law and is written as...
In Hooke's law the force is proportional to the...
www.warley-mrc.org /hookes-law   (157 words)

  
 Raoults Law: Free Encyclopedia Articles at Questia.com Online Library   (Site not responding. Last check: )
...fundamental postulates of logic are known as the law of uniformity of nature and the law of the excluded middle.
The formula or law once discovered, consequences other than...to predict results as consequences of the law, and thence is found the means by which...
RAOULTS LAW raoolz for F. Raoult states that the addition of solute to a liquid...tendency to form into a crystal solid or to escape as a gas.
www.questia.com /library/encyclopedia/raoults-law.jsp?l=R&p=1   (670 words)

  
 Classical and Applied Physics Discussion Forum   (Site not responding. Last check: )
Hooke's law is generally used as a macroscopic relationship like the laws of Optics and Thermodynamics.
This raises the question if Hooke's law is probably instead associated with the shear stress on folded molecule chains (which would also answer your first point regards the transverse stress).
Hooke's law would hold up to a relative strain of 10%, in contradiction to experiments.
www.physicsmyths.org.uk /discussions/classical.htm   (3010 words)

  
 Mad Physics :: Giant Hooke's Law Demonstration
Hooke's Law is comonly demonstrated with 100g weights and a small spring.
Hooke’s law is names after Robert Hooke, a physicist, who in the seventeenth century published the anagram: ceiiinosssttuv.
Hooke’s law is a fundamental concept for springs, but does not accurately predict the behavior of other elastic objects.
www.madphysics.com /exp/giant_hookes_law_demonstration.htm   (506 words)

  
 Rock Climbing Forums: Climbing Information: General: Does climbing rope obey Hooke's law?
The fall-factor concept, which is a consequence of Hooke's law, has been confirmed in many tests and remains the fundamental concept in the testing and certification of ropes.
Hooke's Law is a starting point, but it also implies infinite compression or extension, which we know to be impossible.
The middle section of the curve is the portion one would expect to exhibit Hooke's Law behavior, and it is the middle section, in the case of climbing ropes, that is involved in catching falls.
www.rockclimbing.com /cgi-bin/forum/gforum.cgi?post=1202403   (4105 words)

  
 CNN.com - Hookes is critical after assault - Jan. 18, 2004
Hookes "technically died," but was revived by ambulance paramedics after the assault outside a hotel in the Melbourne bayside suburb of St. Kilda.
Clark Forbes, the program director at Melbourne radio station 3AW, where Hookes is a member of the on-air team, said the attack was so brutal that ambulance paramedics worked to revive Hookes for half an hour.
Hookes was taken to Melbourne's Alfred Hospital where early Monday was in a coma in the intensive care unit.
www.cnn.com /2004/SPORT/01/18/cricket.hookes   (301 words)

  
 GCSE Physics Coursework on Hooke's Law - Hooke's Law
Hooke's Law / Young's Modulus I am trying to find out what factors effect the stretching of a spring.
Testing Hooke's Law Hooke's Law is when forces are applied to a solid object and it can result in extension or compression.
Hooke's Law is able to predict how a spring (or other stretchable object) would behave when force is applied to it.
www.courseworkbank.co.uk /GCSE/Physics_Coursework/Hooke_s_Law   (180 words)

  
 Hookes Law - Our Lawyer Directory - The Best Hookes Law Related Websites!
Hookes Law It's a spring thing All you ever wanted to know about me life the universe and everything...
Mechanics of Materials: Hooke's Law Introduction to Hooke's law, from Hooke's statement to generalized Hooke's law.
Physics Question: Hookes Law Review or post solutions and join thousands of students getting ahead in their classes.
www.enterlawyer.com /lawyer/hookes_law.html   (448 words)

  
 Cricket star Hookes is dead - www.smh.com.au
Hookes' brother Cranagh told journalists the 48-year-old died in the Alfred Hospital in Melbourne from injuries sustained after being bashed outside a Melbourne hotel last night.
Hookes and his Victorian teammates had been having celebratory drinks at the Beaconsfield Hotel in inner-suburban St Kilda after winning an ING Cup game against South Australia.
Mr Cranagh said the Hookes family was grateful to Cricket Australia and Cricket Victoria for their support.
www.smh.com.au /articles/2004/01/19/1074360685418.html   (806 words)

  
 NationMaster - Encyclopedia: Bulk modulus
For an anisotropic solid such as wood or paper, these three moduli do not contain enough information to describe its behaviour, and one must use the full generalized Hooke's law.
Piece of paper Paper is a thin, flat material produced by the compression of fibers (or fibres).
In physics, Hookes law of elasticity is an approximation which states that if a spring is elongated by some distance, x, the restoring force exherted by the spring, F, is proportional to x by a constant factor, k.
www.nationmaster.com /encyclopedia/Bulk-modulus   (947 words)

  
 Elasticity, Periodic Motion
This restoring force is generally proportional to the amount of stretch, as described by Hooke's Law.
For wires or columns, the elasticity is generally described in terms of the amount of deformation (strain) resulting from a given stress (Young's modulus).
One of the properties of elasticity is that it takes about twice as much force to stretch a spring twice as far.
hyperphysics.phy-astr.gsu.edu /hbase/permot2.html   (232 words)

  
 hooke's law and simple harmonic motion / All About Law
Simple harmonic motion is typified by the motion of a mass on a spring when it is subject to the linear elastic restoring force given by Hooke's Law.
Hooke''s law and Simple Harmonic Motion, presented as slides.
The frequency of simple harmonic motion like a mass on a spring is determined by the mass m...
www.warley-mrc.org /hookes-law/hookes-law-and-simple-harmonic-motion.html   (222 words)

  
 law of physics blog search at Topnemo top 100 sites   (Site not responding. Last check: )
for this, its necessary to sweep aside the second law of thermodynamics and propose kerosine which is not only impos...
therefore to declare this act irrevocable would be of no effect in law yet we are free to declare, and do declare, that the rights h...
but moore s law has come to its rescue and what was sluggish in 1997 is often...
www.topnemo.com /search/law-of-physics   (749 words)

  
 PHY205 - required reading for class 5
Newton's second law as discussed in an earlier unit.
One focus of this unit is to understand the physics of collisions.
The physics of collisions are governed by the laws of momentum; and the first law which we discuss in this unit is expressed in the above equation.
www.physics.utoronto.ca /~phy205/reading05.htm   (726 words)

  
 Setting Preload   (Site not responding. Last check: )
Hooke’s law says that the force a spring exerts is equal to the spring rate (how stiff the spring is) (K = spring rate) multiplied by the distance (X) that it travels.
K is a property of the spring and is a fixed number for a given spring.
Your spring is too stiff (or per Hooke’s law, K is too large).
members.aol.com /jmjcycles/preload.htm   (1397 words)

  
 Can You Tell Me About Hookes Law in directory.co.uk   (Site not responding. Last check: )
Hooke's Law gives the relationship between the force applied to an unstretched spring and the amount...
Hookes Law - If a metal is lightly stressed, a temporary deformation, presumably...
Hooke's Law can best be explained as the relationship between the force exerted on the mass and its position (x).
www.directory.co.uk /Can_You_Tell_Me_about_Hookes_Law.htm   (215 words)

  
 Measuring Automobile Spring Constant   (Site not responding. Last check: )
Assuming the car has no shock absorbers it would be possible to predict the frequency of its vibration using Hookes law.
Hookes law says the force provided by a spring is proportional to the displacement from the spring's neutral position.
In a formula it looks like this: F=k*x where F is force, x is displacement and k is the spring constant.
www.mcasco.com /qa_masc.html   (266 words)

  
 images of nature - who we are
In AFM, the probe tip is attached to a cantilever with a small spring constant.
The probe is much like a spring which changes dimension upon experiencing a force (Hookes' law) and the interaction that will be monitored is the repulsion between two atoms when they are brought extremely close to each other.
The forces acting on the probe tip deflect the cantilever and the tip displacement is proportional to the force between the surface and the tip.
ion.eas.asu.edu /descript_scanprobe.htm   (435 words)

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