College Physics知到智慧樹章節(jié)測試課后答案2024年秋中國礦業(yè)大學

CollegePhysics知到智慧樹章節(jié)測試課后答案2024年秋中國礦業(yè)大學第一章單元測試

Whatistheatomicscaleinnature.（）

A:mB:mC:mD:m

答案:mWhatisthecosmicscaleinnature.（）

A:mB:mC:mD:m

答案:mWhichofthefollowingstatementsaboutphysicsarecorrect.（）

A:PhysicsisoneofthemostfundamentalscientificdisciplinesB:PhysicsisthenaturalscienceC:PhysicsexistseverywhereandeverydayD:Physicsconcernsthephenomenafromcosmosdowntoatoms

答案:Physicsisoneofthemostfundamentalscientificdisciplines；Physicsisthenaturalscience；Physicsexistseverywhereandeveryday；PhysicsconcernsthephenomenafromcosmosdowntoatomsWhichofthefollowingsubjectsareincludedintheclassicalphysics.（）

A:MechanicsB:OpticsC:ElectromagneticsD:Thermodynamics

答案:Mechanics；Optics；Electromagnetics；ThermodynamicsRelativitytheoryandquantummechanicsarethefundamentalsofmodernphysics.（）

A:對B:錯

答案:對

第二章單元測試

Abottleofwateris500ml,instandardunits,whichis（）

A:0.005B:0.05C:0.0005D:0.5

答案:0.0005Avectorwithamagnitude10andangleto+yaxis,whichcanbewrittendownas（）。

A:B:C:D:

答案:Whichofthefollowingphysicsquantitiescanbedirectlymeasured.（）

A:timeB:speedC:lengthD:weight

答案:time；length；weightWhichofthefollowingequationsaboutvectoroperationsarecorrect.（）

A:B:C:D:

答案:；；；Iftwovectorsareperpendicular,theirdotproductiszeroandtheircrossproducthasthemaximummagnitude.（）

A:對B:錯

答案:對

第三章單元測試

Aparticlemovesalongxaxis,fromx=0mtox=10mandthenbacktox=5m.Whatarethedisplacementsanddistancedofthemotion（）

A:s=15m,d=15mB:s=5m,d=15mC:s=5m,d=5mD:s=15m,d=5m

答案:s=5m,d=15mAparticlemoveswithaconstantaccelerationfromrestalongxaxis,fromx=0mtox=10min5s.Whatistheacceleration.（）

A:B:C:D:

答案:Inlinearmotion,iftheaccelerationisoppositetotheinitialvelocity,whichofthefollowingstatementsarecorrect.（）

A:ThedistanceforaparticulartimecanbezeroB:ThedisplacementforaparticulartimeintervalcanbezeroC:ThevelocityataparticulartimecanbezeroD:Theaveragevelocityforaparticulartimeintervalcanbezero

答案:Thedisplacementforaparticulartimeintervalcanbezero；Thevelocityataparticulartimecanbezero；TheaveragevelocityforaparticulartimeintervalcanbezeroThemotionequationofaparticleis.At,whichofthefollowingresultsarecorrect.（）。

A:accelerationB:velocityC:velocityD:acceleration

答案:acceleration；velocityInlinearmotion,ifthevelocitydoesnotchangeitsdirection,themagnitudeofdisplacementwillbeequaltothedistance.（）

A:錯B:對

答案:對

第四章單元測試

Aparticlemovesfromthepositionmtomin2s.Whatistheaveragevelocityofthismotion（）。

A:m/sB:m/sC:m/sD:m/s

答案:m/sAparticlemoveswithaconstantacceleration.Ifitsinitialvelocityism/s,whatisthevelocityoftheparticleatt=2s.（）

A:m/sB:m/sC:m/sD:m/s

答案:m/sForatwo-dimensionalvelocity,thechangeofvelocitymayhappenas（）。

A:changeofbothandB:changeofC:changeofD:changeoftheanglebetweenand

答案:changeofbothand；changeof；changeof；changeoftheanglebetweenandAparticleundergoesauniformcircularmotion.Whichofthefollowingstatementsarecorrect.（）。

A:ThetangentialcomponentofaccelerationiszeroB:ThemagnitudeofdisplacementequalstothedistanceforanytimeintervalC:ThemagnitudeofvelocityequalstothespeedD:Theradialcomponentofaccelerationiszero

答案:Thetangentialcomponentofaccelerationiszero；ThemagnitudeofvelocityequalstothespeedForaprojectilemotionfromtheground,themaximumlateraldistancecanbeachievedasthelaunchingangleis.（）

A:對B:錯

答案:對

第五章單元測試

A2-kgblocksitsonaroughground.Ifpushedbya10Nforce,itwillmovewithanacceleration2.Whatisthecoefficientofkineticfriction.（）

A:B:C:D:

答案:Twoparticleswithmassandcanbeacceleratedbyaconstant10-Nforce,Ifnootherforcesandtheratiooftheiraccelerationsare2:1,whatistheratiooftheirmasses.（）

A:B:C:D:

答案:AccordingtoNewton’sfirstlaw,inwhichofthefollowingmotions,thenetforceactingontheparticleiszero.（）。

A:TheparticleisatrestB:TheparticlemoveswithaconstantvelocityC:TheparticlemoveswithaconstantspeedD:Theparticlemoveswithaconstantacceleration

答案:Theparticleisatrest；TheparticlemoveswithaconstantvelocityAccordingtoNewton’sthirdlaw,whichofthefollowingstatementsaboutaction-reactionforcepairsarecorrect.（）

A:TheyhavethesamemagnitudeandsamedirectionB:TheymustactontwodifferentobjectsC:TheyhavethesamemagnitudebutoppositedirectionD:Theycanactonthesameobject

答案:Theymustactontwodifferentobjects；TheyhavethesamemagnitudebutoppositedirectionNewton’slawscanbeappliedtobothinertialandnon-inertialframes.（）

A:對B:錯

答案:錯

第六章單元測試

A2-kgparticlemovesfromvelocityto.Whatistheworkdonebythenetforce.（）

A:12JB:22JC:36JD:16J

答案:12JA2-kgparticleisprojectedfromatableofheight3m,withaspeed5m/s.Whatisthemechanicalenergyoftheparticleasitdropsdowntotheheight2m.（）

A:64.2JB:33.8JC:44.6JD:83.8J

答案:83.8JInwhichofthefollowingmotions,theworkbythenetforceiszero.（）

A:motionwithconstantaccelerationB:freelyfallingmotionC:uniformcircularmotionD:motionwithconstantvelocity

答案:uniformcircularmotion；motionwithconstantvelocityInwhichofthefollowingsituations,themechanicalenergyisconserved.（）

A:ablockmovingonaroughsurfaceB:onlyconservativeforcesdotheworkC:ablockfreelyfallingandcompressingaspringD:projectilemotion

答案:onlyconservativeforcesdothework；ablockfreelyfallingandcompressingaspring；projectilemotionIfnon-conservativeforcesdothework,bothmechanicalenergyandtotalenergyarenotconserved.（）

A:對B:錯

答案:錯

第七章單元測試

A2-kgparticlemovesforrestduetoa10-Nnetforce.In5s,whatisfinalmomentoftheparticle.（）

A:B:C:D:

答案:A5-kgblockwithavelocitycollideswitha10-kgblockatrest.Ifitisaperfectlyinelasticcollision,whatisthefinalvelocityofthetwoblocks.（）

A:B:C:D:

答案:Inelasticcollision,whichofthefollowingphysicsquantitiesareconserved.（）

A:kineticenergyofthesystemB:momentumofthesystemC:momentumofeachparticleD:kineticenergyofeachparticle

答案:kineticenergyofthesystem；momentumofthesystemIfthemomentumisconservedforasystem,whichofthefollowingstatementsarecorrect.（）

A:zeroforceactingoneachparticleB:internalforcesoneachotherformingaction-reactionpairsC:zeroexternalforceactingonthesystemD:nointernalforcesinthesystem

答案:internalforcesoneachotherformingaction-reactionpairs；zeroexternalforceactingonthesystemForconservationofmomentum,theinternalforcescanonlybeconservativeforces.（）

A:錯B:對

答案:錯

第八章單元測試

AuniformdiskofmassMandradiusR,whatistherotationalinertialastheaxisperpendiculartothediskandpassingthroughitsedge.（）

A:B:C:D:

答案:AuniformrodofmassMandlengthLrotateswithanangularspeed.Iftheaxispassingthroughitsoneend,whatistheangularmomentum.（）

A:B:C:D:

答案:Aparticleofmassrotateswithanangularspeed，andadistancetotherotationalaxis.Whichofthefollowingequationsarecorrect.（）

A:angularmomentumoftheparticleB:kineticenergyoftheparticleC:linearspeedoftheparticleD:radialacceleration

答案:angularmomentumoftheparticle；kineticenergyoftheparticle；linearspeedoftheparticleWhichofthefollowingstatementsaboutrotationalinertiaarecorrect.（）

A:TheminimumrotationalinertiaappearsastheaxisthroughthecenterofmassB:TheparallelaxistheoremcanbeusedtocalculaterotationalinertiaC:TheobjectwithlargermassmusthavelargerrotationalinertiaD:Therotationalinertiacanbedifferentfordifferentaxis

答案:Theminimumrotationalinertiaappearsastheaxisthroughthecenterofmass；Theparallelaxistheoremcanbeusedtocalculaterotationalinertia；TherotationalinertiacanbedifferentfordifferentaxisThetorqueonparticleisduetothenetforceonthatparticle,includingbothinternalandexternalforces.（）

A:錯B:對

答案:對

第九章單元測試

Anoscillatortakes10sfor5revolutions.Whatistheangularfrequencyofthisoscillation.（）

A:B:C:D:

答案:Inspring-blocksystem(springconstantandmass),whatisthefr