高中物理必背知识点实用口诀 TXT手机版.docx

高中物理必背知识点实用口诀 TXT手机版.docx

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高中物理必背知识点实用口诀TXT手机版

高中物理必背知识点实用口诀（TXT手机版）（Practicaltipsforhighschoolphysics（TXT））

1.Descriptionofmovement

1.Objectmodelwithparticlesize,ignoreshapeandsize;Theearthturnstobeaparticle,theearth'srotationisaboutthesize.Thechangeoftheobjectposition,accuratedescriptionwithdisplacement,speedSmovementthant,withΔvandtthana.

2.Usinggeneralformula,averagevelocityissimplemethod,intermediatetimevelocitymethod,initialvelocityzeroratiomethod,andgeometricimagemethod,tosolvethemethodofmotion.Thefreefallisaninstance,theinitialvelocityiszeroa,etc.Thespeedofthecentermomentisequaltotheaveragevelocity;Accelerationhasagoodside,ΔSaTsquare,etc.

3.Thevelocitydeterminesthemotionoftheobject,inthedirectionoftheaccelerationofthevelocity,thesamedirectionisacceleratedbackward,andtheverticalturningisthesame.

Second,theforce

1.Forceanalysisisthekeytosolvemechanicalproblems;Analyzetheforceofforceanddealwithitaccordingtotheeffect.

2.Theanalysisforceshouldbecareful,quantitativecalculationofsevenforces;Theforceofgravityisdeterminedbytheforceofgravity.Thereiselasticityandfriction,relativemotionisthebasis;Theforceofgravityisdefiniteinallthings.Lorenzforce,theessenceisunity;Verticalforceisthelargest,parallelinabilitytoremember.

3.Thecalculationresultisonly"quantity"inthesamedirection.Thetwoforcesaresmallandlarge,twoforcesareq-angleclip,parallelogrammethod;Theresultantforcesizevarieswithq,onlyinthemaximumminimum,andtheforceoftheforceiscombinedtotheotherside.

Themulti-forceproblemstate,orthogonaldecompositiontosolve,trigonometricfunctionscanberesolved.

4.Multiplemethodsofmechanicalproblems,integralisolationandhypothesis;Allyouneedtodoislookattheexternalforceandsolvetheinternalforceisolation.Thestateisthesameasthewhole,otherwiseitismuchmoreisolated;Evenifthestateisdifferent,thewholecowiicanbedone;Supposethatsomeforceisorisnot,andisdeterminedaccordingtothecalculation;Thelimitmethodgrabsthecriticalstate,theprocedurallawisdoneinorder;Orthogonaldecompositioncoordinates,theaxialvectorisasmuchaspossible.

Newton'slawsofmotion

1.Fandotherma,Newtontwolaw,produceacceleration,becauseofforce.

Sothenetforceisgoinginthesamedirectionasa,sothevelocityvariableisgoingtobeequaltoa,soit'sgoingtobeasmaller,butit'sgoingtobegreaterthanu,soit'sgoingtobeequaltou.

2.TheforceofNandTdependsontheweight,andthemgproductistherealweight.Heavyweightlossisregardedasheavy,andtheinvariantisrealweight;Accelerationisoverweight,decelerationisalsooverweight;Weightlessnessisdeterminedbyaddinganddecreasing,completelylosingattentiontozero

Four,curvemotion,gravitation

1.Themotiontrajectoryisthecurve,thecentripetalforceexistsasthecondition,thecurveischanging,thedirectionisthetangentline.

2.Thecircularmotioncentripetalforce,thesupplyanddemandrelationintheheart,theradialforceprovidesthefoot,needsmusquaredoverR,MRWsquarealsoneeds,thesupplyanddemandbalanceisnotdisoriented.

Gravitationisbornofmassandexistsinalloftheworld.Satellitesorbitthecelestialbody,andthefastandslowmotionofthesatelliteisdeterminedbydistance,thecloseritis,thefasteritgoes,thefartheritgoes,thesloweritgoes,thespeedofthesynchronoussatelliteisfixed,andthesatelliteistravelingovertheequator.

Mechanicalenergyandenergy

1.Determinethestateforkineticenergy,

Theanalysisprocesslooksfortheforcework,plusthepositiveandnegativeworktogether,thekineticenergyincrementisthesameasthat.

It'sclearthatthetwostatemechanicalenergy,theprocessforceisdoingwork,the"gravity"iszero,theinitialstateenergyisthesame.

3.Determinethestatetofindtheamountofenergy,andthenlookattheprocessforcetodowork.Sothere'sachangeinenergy,andtheinitialstateenergyisthesame.

6.Electricfield

1.Coulomb'slawchargeforce,gravitationalattractionforce,asifitisthetwinbrother,kQqandrsquaredratio.

2.Thereisanelectricfieldaroundthecharge,andFisstrongerthanq.KQismorethanr2,andUisequaltotheelectricfield.

Theintensityoftheelectricfieldisthevector,theforceofthepositivechargeisfixed.Descriptionoftheuseofelectricfield,thedensityofweakandstrong.

Thefieldenergyiselectricpotentialandthefieldlineisdecreasing.TheworkoffieldforceisqU,thekineticenergytheoremcannotbeforgotten.

4.Theelectricfieldhasequipotentialsurface,whichisperpendiculartothefieldline.Thedirectionislowwithhighdirection,andthesurfacedensityischaracteristic.

7,constantcurrentisoptional3-1

Whenthechargeismoving,thecurrentisequaltoqovert.Thefreechargeistheinternalcause,andthevoltageonbothendsisthecondition.

Thepositiveloadflowdirectionisdetermined,andtheflowmeterismeasured.Theexternalcurrentofthepowersupplyisnegative,fromnegativetoserious.

2.Threefactorsofresistancelaw,thetemperatureisconstant,thecontrolvariableisdiscussed,rlratiosandotherresistance.

ThecurrentisdoingtheworkUIt,theelectrothermalIsquaredRt.Electricpower,Wratiot,voltagetimescurrentisalso.

3.Basicelectricpathlinkingandseparatingpressureshunt.Complexcircuitsusethebrain,theequivalentcircuitisthekey.

4.Partialcircuitofclosedcircuit,externalcircuitandinternalcircuit,followedbyohm.

Pressuredropintheterminalvoltage,andtheelectromotiveforce,exceptthetotalresistancecurrentis

8,3-1

Thereisamagneticfieldaroundthemagnet,andtheforceoftheNisdetermined.Thereisamagneticfieldaroundthecurrent,andamperesetthedirection.

2.FratioIlisthefieldintensity,phiandotherBSmagneticflux,magneticfluxdensityphiratioS,thenameofmagneticfieldstrengthisdifferent.

3.BILampereforce,perpendiculartoeachother.

Lorentzforce,theforceoftheforcetotheleft.

9.Electromagneticinduction（3-2）

1.Electromagneticinductionmagneticinduction,fluxvariationisacondition.Thecircuitcloseswithacurrent,andthecircuitbreakeristhepowersupply.

Theinductionelectromotiveforcesize,thefluxrateoffluxisknown.

2.Thedirectionoflenz'slawisthekeytopreventchange.Conductorscutthemagneticline,andtherighthandruleismoreconvenient.

3.Lenz'slawisabstract,whichreallyunderstandsfromthethreeparties,hinderstheincreaseanddecreaseofthemagneticflux,andtherelativemotionisresisted,theself-inductancecurrentwantstostop,theenergyconservationshouldbe.Youlookatthemagneticfieldinthefirstplace,wheretheinducedmagneticfieldisgoingtogoup,andallthemagneticfluxincreasesordecreases,andtheamperesetisknowntotheI.

10.Alternatingcurrent（3-2）

1.Theuniformmagneticfieldhascoils,rotatingtogeneratealternatingcurrent.Thecurrentvoltageelectromotiveforce,thechangeruleisthestring.

Theneutralsurfacetimeissine,paralleltimeiscosine.

2.NBSomegaisthemaximumvalueandtheeffectivevalueiscalculatedwithheat.

3.

Transformerforacuse,constantcurrentcannotbeused.

Idealtransformer,primaryUIvalue,secondaryUIvalue,equalityisprinciple.

Ratioofvoltagetoratioofturns;Theratioofthecurrenttotheratioofturns.

Applytheratioofvariable-pressureratio,ifyouwanttofindthenumberofturns,turnitintotheturns.

Farawayfromthepowertransmission,thevoltagedropissent,otherwisetheuserwilllowerthepressure.

11.Gaseousequation:

3-3

Studythequalityofthegasanddeterminethestatusoftheparameters.TheabsolutetemperatureisthevolumeofT,volumeisvolume.

Pressureanalysis,Newton'slawforyou.Thestateparametermustbefound,PVisequaltoT.

12.Lawsofthermodynamics

Thefirstlawofthermodynamics,theconservationofenergy.Howmuchinternalenergychange,howmuchheatyoucando.

Positiveandnegativesignsneedtobeaccurate,incomeexpendituretounderstand.Theinternalenergyandheatabsorptionarepositive.Externalworkandheatreleasecanreducenegativevalues.

2.Secondlawofthermodynamics,heattransferisirreversible,heattransferandheattransferwork,withdirectivity.

13,mechanicalvibrations3-4

ThesimpleharmonicvibrationshouldkeepinmindthatOisthedisplacementofthestartingpoint,thedirectionoftherecoveryforce,alwaysintheequilibriumposition,

Themagnitudeisproportionaltothedisplacement,andtheequilibriumpositionisu.

2.Opointsymmetrydon'tforget,vibrationstrengthistheamplitudeofvibrationspeedisacycle,thecycle,4awalkpendulumcyclethanlg,n-throotby2p,againplacecyclefor2secondsseconds,setaboutlengthof1meterlong.

Tothecenterofthecenterofmass,thependulumhasequaltime.

3.Thedirectionofthevibrationimageistracedfromthebottomtothetop,fromtoptobottom;Thedisplacementofthevibrationimage,thegreatdisplacementofthebasepoint,thepositiveandnegativesigndirection.

14.Mechanicalwave（3-4）

1.Ontheleft,ontherightandontheright.Thepeakpointhasnodirection.

2.Followthedirectionofcommunication,fromthevalleytothepeakoftheclimb,thebottomofthefootmustpushdown,upanddowntomove.

3.Theimagesofdifferenttime,fourpointsΔtoneorthree,particlemovementdoubts,Sandvtsenttouse.

15.Opticsforelective