ap物理c真题解答题 c.docx
- 文档编号:25373045
- 上传时间:2023-06-07
- 格式:DOCX
- 页数:9
- 大小:17.88KB
ap物理c真题解答题 c.docx
《ap物理c真题解答题 c.docx》由会员分享,可在线阅读,更多相关《ap物理c真题解答题 c.docx(9页珍藏版)》请在冰豆网上搜索。
ap物理c真题解答题c
【AP物理C】【真题】解答题C2000
AP?
PhysicsC
2000FreeresponseQuestions
ThematerialsincludedinthesefilesareintendedforusebyAPteachersforcourseandexampreparationintheclassroom;permissionforanyotherusemustbesoughtfromtheAdvancedPlacementProgram?
.Teachersmayreproducethem,inwholeorinpart,inlimitedquantities,forface-to-faceteachingpurposesbutmaynotmassdistributethematerials,electronicallyorotherwise.Thesematerialsandanycopiesmadeofthemmaynotberesold,andthecopyrightnoticesmustberetainedastheyappearhere.Thispermissiondoesnotapplytoanythird-partycopyrightscontainedherein.
ThesematerialswereproducedbyEducationalTestingService?
(ETS?
),whichdevelopsandadministerstheexaminationsoftheAdvancedPlacementProgramfortheCollegeBoard.TheCollegeBoardandEducationalTestingService(ETS)arededicatedtotheprincipleofequalopportunity,andtheir
programs,services,andemploymentpoliciesareguidedbythatprinciple.
TheCollegeBoardisanationalnonprofitmembershipassociationdedicatedtopreparing,inspiring,andconnectingstudentstocollegeandopportunity.Foundedin1900,theassociationiscomposedofmorethan4,200schools,colleges,universities,andothereducationalorganizations.Eachyear,theCollegeBoardservesoverthreemillionstudentsandtheirparents,22,000highschools,and3,500colleges,throughmajorprogramsandservicesincollegeadmission,guidance,assessment,financialaid,enrollment,andteachingandlearning.Amongitsbest-knownprogramsaretheSAT?
the
PSAT/NMSQT?
andtheAdvancedPlacementProgram?
(AP?
).TheCollegeBoardiscommittedtotheprinciplesofequityand
excellence,andthatcommitmentisembodiedinallofitsprograms,services,activities,andconcerns.
APIELisatrademarkownedbytheCollegeEntranceExaminationBoard.PSAT/NMSQTisaregisteredtrademarkjointlyownedbytheCollegeEntranceExaminationBoardandtheNationalMeritScholarshipCorporation.EducationalTestingServiceandETSareregisteredtrademarksofEducationalTestingService.
Copyright?
2000byCollegeEntranceExaminationBoard.Allrightsreserved.
CollegeBoard,AdvancedPlacementProgram,AP,SAT,andtheacornlogoareregisteredtrademarksoftheCollegeEntranceExaminationBoard.
(2000M1)Youareconductinganexperimenttomeasuretheaccelerationduetogravityguatanunknownlocation.Inthemeasurementapparatus,asimplependulumswingspastaphotogatelocatedatthependulum'slowestpoint,whichrecordsthetimet10forthependulumtoundergo10fulloscillations.Thependulumconsistsofasphereofmassmattheendofastringandhasalengthl.Therearefourversionsofthisapparatus,eachwithadifferentlength.Allfourareattheunknownlocation,andthedatashownbelowaresenttoyouduringtheexperiment.
t10TT2?
(s)(s)(s2)(cm)12 182132 a.Foreachpendulum,calculatetheperiodTandthesquareoftheperiod.Useareasonablenumberofsignificantfigures.Entertheseresultsinthetableabove.
b. Ontheaxesbelow,plotthesquareoftheperiodversusthelengthofthependulum.Drawabest-fitstraightline
forthisdata.c.Assumingthateachpendulumundergoessmallamplitudeoscillations,fromyourfitdeterminetheexperimentalvaluegexpoftheaccelerationduetogravityatthisunknownlocation.Justifyyouranswer.
d. Ifthemeasurementapparatusallowsadeterminationofgexpthatisaccuratetowithin4%,isyourexperimental
valueinagreementwiththevaluem/s2?
Justifyyouranswer.
e.SomeoneinformsyouthattheexperimentalapparatusisinfactnearEarth'ssurface,butthattheexperimenthas
beenconductedinsideanelevatorwithaconstantaccelerationa.Assumingthatyourexperimentalvaluegisexact,determinethemagnitudeanddirectionoftheelevator'sacceleration.
Copyright?
2000byCollegeEntranceExaminationBoard.Allrightsreserved.
CollegeBoard,AdvancedPlacementProgram,AP,SAT,andtheacornlogoareregisteredtrademarksoftheCollegeEntranceExaminationBoard.
2000M2.Arubberballofmassmisdroppedfromacliff.Astheballfalls,itissubjecttoairdrag(aresistiveforcecausedbytheair).Thedragforceontheballhasmagnitudebv2,wherebisaconstantdragcoefficientandvistheinstantaneousspeedoftheball.Thedragcoefficientbisdirectlyproportionaltothecross-sectionalareaoftheballandthedensityoftheairanddoesnotdependonthemassoftheball.Astheballfalls,itsspeedapproachesaconstantvaluecalledtheterminalspeed.
a.Onthefigurebelow,drawandlabelalltheforcesontheballatsomeinstantbeforeitreachesterminalspeed.
b. Statewhetherthemagnitudeoftheaccelerationoftheballofmassmincreases,decreases,orremainsthesame
astheballapproachesterminalspeed.Explain.
c.Write,butdoNOTsolve,adifferentialequationfortheinstantaneousspeedvoftheballintermsoftimet,the
givenquantities,andfundamentalconstants.
d. Determinetheterminalspeedvtintermsofthegivenquantitiesandfundamentalconstants.
e.Determinetheenergydissipatedbythedragforceduringthefalliftheballisreleasedatheighthandreaches
itsterminalspeedbeforehittingtheground,intermsofthegivenquantitiesandfundamentalconstants.
2000M3.ApulleyofradiusR1androtationalinertiaI1ismountedonanaxlewithnegligiblefriction.Alightcordpassingoverthepulleyhastwoblocksofmassmattachedtoeitherend,asshownabove.Assumethatthecorddoesnotsliponthepulley.Determinetheanswerstoparts(a)and(b)intermsofm,R1,I1,andfundamentalconstants.a.DeterminethetensionTinthecord.
b.Oneblockisnowremovedfromtherightandhungontheleft.Whenthesystemisreleasedfromrest,thethree
blocksontheleftacceleratedownwardwithanaccelerationg/3.Determinethefollowing.i.ThetensionT3inthesectionofcordsupportingthethreeblocksontheleftii.ThetensionTlinthesectionofcordsupportingthesingleblockontherightiii.TherotationalinertiaI1ofthepulley
Copyright?
2000byCollegeEntranceExaminationBoard.Allrightsreserved.
CollegeBoard,AdvancedPlacementProgram,AP,SAT,andtheacornlogoareregisteredtrademarksoftheCollegeEntranceExaminationBoard.
c. Theblocksarenowremovedandthecordistiedintoaloop,whichispassedaroundtheoriginalpulleyanda
secondpulleyofradius2R1androtationalinertia16I1.Theaxisoftheoriginalpulleyisattachedtoamotorthatrotatesitatangularspeed?
1,whichinturncausesthelargerpulleytorotate.Theloopdoesnotsliponthepulleys.DeterminethefollowingintermsofI1,RI,and?
1.i.Theangularspeed?
2ofthelargerpulley
ii.TheangularmomentumL2ofthelargerpulleyiii.Thetotalkineticenergyofthesystem
2000E1.LightbulbsA,B,andCareconnectedinthecircuitshownabove.
a.Listthebulbsinorderoftheirbrightness,frombrightesttoleastbright.Ifanybulbshavethesamebrightness,
statewhichones.Justifyyouranswer.
NowaswitchSandamHinductorareaddedtothecircuit;asshownabove.Theswitchisclosedattimet=0.
b.DeterminethecurrentsIA,IB,andICforthefollowingtimes.i.Immediatelyaftertheswitchisclosedii.Alongtimeaftertheswitchisclosed
Copyright?
2000byCollegeEntranceExaminationBoard.Allrightsreserved.
CollegeBoard,AdvancedPlacementProgram,AP,SAT,andtheacornlogoareregisteredtrademarksoftheCollegeEntranceExaminationBoard.
c.Ontheaxesbelow,sketchthemagnitudeofthepotentialdifferenceVLacrosstheinductorasafunctionoftime,
fromimmediatelyaftertheswitchiscloseduntilalongtimeaftertheswitchisclosed.
d. Nowconsiderasimilarcircuitwithanuncharged?
Fcapacitorinsteadoftheinductor,asshownabove.The
switchisagainclosedattimet=0.Ontheaxesbelow,sketchthemagnitudeofthepotentialdifferenceVcapacrossthecapacitorasafunctionoftime,fromimmediatelyaftertheswitchiscloseduntilalongtimeaftertheswitchisclosed.
Copyright?
2000byCollegeEntranceExaminationBoard.Allrightsreserved.
CollegeBoard,AdvancedPlacementProgram,AP,SAT,andtheacornlogoareregisteredtrademarksoftheCollegeEntranceExaminationBoard.
2000E2.Threeparticles,A,B,andC,haveequalpositivechargesQandareheldinplaceattheverticesofan
equilateraltrianglewithsidesoflengthl,asshowninthefiguresbelow.Thedottedlinesrepresentthebisectorsforeachside.Thebaseofthetriangleliesonthex-axis,andthealtitudeofthetriangleliesonthey-axis.
a.
i.PointP1,theintersectionofthethreebisectors,locatesthegeometriccenterofthetriangleandisonepoint
wheretheelectricfieldiszero.OnFigure1above,drawtheelectricfieldvectorsEA,EB,andECatP,duetoeachofthethreecharges.Besureyourarrowsaredrawntoreflecttherelativemagnitudeofthefields.
ii.AnotherpointwheretheelectricfieldiszeroispointP2at(0,y2).OnFigure2above,drawelectricfield
vectorsEA,EB,andECatP2duetoeachofthethreepointcharges.Indicatebelowwhetherthemagnitudeofeachofthesevectorsisgreaterthan,lessthan,orthesameasforpointP1.
EAEBECGreaterthanatP1LessthanatP1ThesameasatP1 b. Explainwhythex-componentofthetotalelectricfieldiszeroatanypointonthey-axis.
c.WriteageneralexpressionfortheelectricpotentialVatanypointonthey-axisinsidethetriangleintermsofQ,
l,andy.
d. Describeh
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ap物理c真题解答题 ap 物理 题解 答题