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1、【专题一】受力分析物体的平衡[Topic1]forceanalysisofthebalanceofobjects[testanalysis]1.,thetopicsinvolvedare:slidingfriction,staticfrictionanddynamicfrictionfactor,deformation,elasticity,Hooke'slaw,thesynthesisanddecompositionofforces・"Outline"for"slidingfriction,staticfriction,dynamic
2、frictionfactor,deformation,elasticityandHooke'slaw，zandothertestsitesareclassIrequirements;the"synthesisanddecompositionofforce"forthesecondclassrequirements・Forceisthebasisofphysics,isthecontentofcollegeentranceexamination.Amongthem,theprobabilityoffrictionandHooke'slaw
3、ishigher・Mainlyrelatedtospringproblems,friction,etc・，throughtheconnector,stackandotherformsofexamination.Thefocusofthereviewisthesynthesisanddecompositionofforces,theconceptoffrictionandthelawofchange.Collegeentraneeexaminationhot2.thistopicismainlycomposedoftwoaspects:t
4、hefirstisthefrictionoftheproblem,twoisthetwosynthesisproblemofconcurrentforce・TheknowledgeofthischapterisoftenexaminedinaccordancewithNewton，slaw,workandenergy,electromagneticfields,etc..Simpleexaminationofthischapterofmultiple-choicequestions,mostlymediumdifficulty.[kno
5、wledgeconvergence]1.gravity(1):gravityiscausedbygroundobjectsontheearth,butthetwoarenotequivalent,asacomponentofgravitytoprovidetheobjectwiththerotationoftheearthto・andanothercomponentthatisgravity,asshowninthefigureofgravityandcentripetalforce・(2)size:changewiththechang
6、eofgeographicalpositionAtthepoles:Attheequator:Generally,G二mgisnearthegroundsurface(3)direction:vertical,downward,andnotpointingtothecenteroftheearth2.elasticity(1):contactconditions;theextrusion;the・deformation(2)size:spring,Newton，slawandsolvedbyotherelasticequilibrium
7、conditions・(3):thedirectionofthepressureandthesupportingforceinthedirectionperpendiculartothedirectionpressedorsupportobjects,ifthecontactsurfaceisspherical,actionlineelasticropemusthave・forcealongtherope,rodforcealongtherod・Thecontactsurfaceandthecenter,some,notnecessar
8、ilyTheropecanonlyproducetherelay,therodcanproducetensionorsupportforce,soweshouldpayattentiontothediffe
