College Physics知到智慧树期末考试答案题库2024年秋中国矿业大学VIP

CollegePhysics知到智慧树期末考试答案题库2024年秋中国矿业大学/zhs/question-import/formula/202210/9d49b3e0af094ae18b2248081f30a9b1.png

A:B:C:D:E:

答案:/zhs/question-import/formula/202210/9fe91f0cc53f4098b8bdbb2ad1a5fadd.png

A:B:C:D:

答案:Themotionequationofaparticleis(m);fromto,whataretheaveragevelocity,andtheaverageacceleration.（）

A:,B:,C:,D:,E:,

答案:A1-kgparticlelocatesatm,andanotherparticlelocatesatm.Ifthecenterofmassofthesystemis,whatisthemassofsecondparticleandwhatisthevalueof.（）

A:kg,mB:kg,mC:kg,mD:kg,m

答案:Auniformrodeofmassandradius.Astherotationaxisisperpendiculartotherodeandthroughtheend,whatistherotationalinertiaoftherode.（）

A:B:C:D:E:

答案:Vectorsand.Whatisthedotproductofthesetwovectors.（）。

A:B:C:D:

答案:/zhs/question-import/formula/202210/a57e9a1dadf8496097460ea0de30cac9.pngAparticlemoveswithconstantaccelerationandat,velocity.At,whatarethevelocityandthedisplacement.（）

A:,B:,C:,D:,E:,

答案:/zhs/question-import/formula/202210/da9a66884d20499c8adde9dbf8d33a8e.pngAcaracceleratesinthe-xdirectionfromrestto200m/sin10s,andthenacceleratesinthe+xdirectionto200m/sin10s.Whatisthemagnitudeofaverageacceleration.（）

A:B:C:D:

答案:A2-kgparticlemovesupwardfromtheoriginto.Whatisthechangeofgravitationalpotentialenergy(gravityisinthedirection).（）

A:58.8JB:-39.2JC:-58.8JD:39.2J

答案:58.8JYourundueeastwithaconstantspeed3m/sfor10s,andthenrunduewestwithaconstantspeed2m/sfor5s.Whatistheaveragespeed.（）

A:1m/sB:5m/sC:8/3m/sD:4/3m/s

答案:8/3m/sA1-kgparticlelocatesatm,anda2-kgparticlelocatesatm.Whatisthecenterofmassofthesystem.（）

A:mB:mC:mD:m

答案:/zhs/question-import/formula/202210/c742056f276a493ead265402d7ad2586.pngAcartravelsalongxaxiswithaconstantacceleration.Ifittravelsin10s,withthespeedfrom20m/sinthe-xdirectionandto40m/sinthe+xdirection,whatisthedisplacement.（）

A:200mB:100mC:300mD:600m

答案:100m/zhs/question-import/formula/202210/7bf599e0cc6f4e938df99b8290475861.png

A:B:C:D:

答案:A1-kgparticlemovesupwardfromtheoriginto.Whatisworkdonebytheforceofgravitywhichisindirection.（）

A:JB:JC:JD:J

答案:A2-kgblockmoveswithaspeedwillhitanunstressedspringofspringconstant.Whatisthemaximumcompressedlengthofthespring.（）

A:0.8mB:0.4mC:0.2mD:0.1m

答案:0.1m/zhs/question-import/formula/202210/3627b7e83ed5413199fcf384ea64e5a1.png

A:B:C:D:

答案:Fourparticlesofmass1kg,2kg,3kg,and4kglocateatthefourcornersofasquare(sidelength4m).Ifrotationalaxisperpendiculartothesquareandthroughitscenter,whatisthemomentumofinertia.（）

A:B:C:D:E:

答案:/zhs/question-import/formula/202210/1c62b9e4a0fa4ca992b064dd27009f7e.pngAjugglerthrowsabowlingpinupwithaninitialspeedof14.7m/s.Howmuchtimeelapsesuntilthebowlingpinreturnstothehandofjuggler.（）

A:2.0sB:3.0sC:1.5sD:4.5s

答案:3.0sVectorsoflength2alongaxisandoflength3alongaxis.Theirdotproductandcrossproductare（）.

A:,B:,C:,D:,

答案:Aparticleofmassrotateswithangularspeedaboutanaxisthatisdistanceawayfromtheparticle.Whataretheangularmomentumandkineticenergy.（）

A:,B:,C:,D:,E:,

答案:Aparticleofmassmovestodirectionofaspeed,andanotherparticleofmassmovestodirectionofaspeed.Whatisthelinearmomentumofthesystem.（）

A:,directionB:,directionC:,directionD:,directionE:,direction

答案:Abulletofmassisfiredhorizontallywithaspeedfromacliffofheight.Assumenoairresistance,whatisthechangeofthegravitationalpotentialenergyasthebulletreachestheground.（）

A:B:C:D:

答案:/zhs/question-import/formula/202210/05a29f162b5d4805a8e98314599690bd.pngThreeforces(inunitN),,andactonaparticleofmass0.5kg.Iftheparticlehasacceleration,whatis.（）

A:B:C:D:

答案:AforceNactsonaparticlethatundergoesadisplacementm.Whatistheworkdonebytheforce.（）

A:-1JB:18JC:20JD:17J

答案:17JAcartravelsinthe+xdirection.Itacceleratesfromrestto200m/sin10s,andthentravelswith200m/sforanother10s.Whatisthemagnitudeofaverageacceleration.（）

A:B:C:D:

答案:Themotionequationofaparticleis(m);at,whataretheinstantaneousvelocityandtheinstantaneousacceleration.（）

A:,B:,C:,D:,E:,

答案:Aparticlemovesalongacircleofradius.Asitreturnstoitsoriginalposition,whatarethedisplacementanddistance（）。

A:,B:,C:,D:,

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A:B:C:D:E:

答案:Weknow1inchis2.54cm.Whatisthevolume1literincubicinches.（）

A:1liter=16.4cubicinchesB:1liter=0.061cubicinchesC:1liter=61.0cubicinchesD:1liter=0.016cubicinches

答案:C:1liter=61.0cubicinchesAforceNactsonaparticlewhichmovesfromtheorigintomalongxaxis.Whatistheworkdonebytheforce.（）

A:-2JB:10JC:12JD:8J

答案:10JWhichofthefollowingstatementsaboutdisplacementanddistancearecorrect.（）

A:ThedisplacementisdirectedfromtheinitialpositiontofinalpositionB:ThedisplacementisalwaysparalleltoaveragevelocityC:ThedisplacementisreversedastheinitialandfinalpositionsexchangedD:ThedisplacementisnotalongthemotionpathE:Themagnitudeofthedisplacementequalstothedistance

答案:Thedisplacementisreversedastheinitialandfinalpositionsexchanged###Thedisplacementisnotalongthemotionpath###Thedisplacementisalwaysparalleltoaveragevelocity###ThedisplacementisdirectedfromtheinitialpositiontofinalpositionInwhichofthefollowingprocesses,thelinearmomentumofthesystemisconserved.（）

A:fireabulletB:twoblockscollideonasmoothsurfaceC:ablockslidesonaroughsurfaceD:explosionE:amanwalkingonavehiclethatisrestonsmoothsurface

答案:B,EWhichofthefollowingstatementsaboutthetorquearecorrect.（）

A:AlargerforcealwaysgivesalargertorqueB:ThetorqueofaforcecanbeparalleltotheforceC:ThetorqueofaforceisdifferentfordifferentrotationalaxisD:AforcecancontributezerotorqueE:Thetorqueisproportionaltoboththeforceanditsleverarm

答案:Thetorqueisproportionaltoboththeforceanditsleverarm###Thetorqueofaforceisdifferentfordifferentrotationalaxis###AforcecancontributezerotorqueForasimpleharmonicoscillationinthexdirection,whichofthefollowingequationsforkineticenergyandpotentialenergyarecorrect.（）

A:B:C:D:E:

答案:Abooksitsatrestonatable.Whichofthefollowingtwoforcesareaction-reactionpairs.（）

A:TheforceoftableonbookandthegravityofthebookB:TheforceoftableongroundandthegravityofthetableC:TheforceofbookontableandtheforceoftableonbookD:TheforceofbookonearthandthegravityofthebookE:Theforceofgroundontableandthegravityofthetable

答案:Theforceofbookonearthandthegravityofthebook###Theforceoftableongroundandthegravityofthetable###TheforceofbookontableandtheforceoftableonbookForvectorproduct,,,andareunitvectorsinthe+x,+y,and+zdirection,respectively.Whichofthefollowingequationsarecorrect.（）

A:B:C:D:E:

答案:Inlinearmotion,anobjectcanbetreatedasapoint-likemass.Whichofthefollowingstatementsarecorrect.（）

A:TheobjectmusthaveaconstantvelocityB:ThemotionisindependentontheshapeoftheobjectC:EverypointontheobjecthasthesamechangeinpositionD:TheobjectmusthaveaconstantaccelerationE:Thesizeoftheobjectismuchsmallerthanthedistance

答案:B,C,EWhichofthefollowingstatementsaboutthefrictionforcearecorrect.（）

A:FrictioncanbedividedintostaticfrictionandkineticfrictionB:FrictionalwayscausesthelossofmechanicalenergyC:FrictionisalwaysperpendiculartothenormalforceD:KineticfrictionisalwayslargerthanstaticfrictionE:Frictionisalwaysoppositetothedirectionofmotion

答案:A,EForanoscillationwithperiod,frequency,andangularfrequency,whichofthefollowingequationsarecorrect.（）

A:B:C:D:E:

答案:/zhs/question-import/formula/202210/895754311f554f8ba47f055114fec6f1.png###/zhs/question-import/formula/202210/b65048654ce44561bcdd0220b372cfa0.png###/zhs/question-import/formula/202210/dd2134385c974afa9bd5048249daf4e0.pngForasimpleharmonicoscillationinthexdirection,whichofthefollowingstatementsarecorrect.（）

A:isthemaximumaccelerationB:isthemaximumvelocityC:isdifferentfordifferentD:isthemaximumdisplacementE:determinestheinitialposition

答案:Ifavectorismultipliedbyascalar,itsdirectiondoesnotchange.（）

A:对B:错

答案:对Aphysicalquantityhasbothmagnit