College Physics智慧树知到答案2024年中国矿业大学

CollegePhysics中国矿业大学智慧树知到答案2024年第一章测试

Whatistheatomicscaleinnature.（）

A:mB:mC:mD:m

答案:BWhatisthecosmicscaleinnature.（）

A:mB:mC:mD:m

答案:BWhichofthefollowingstatementsaboutphysicsarecorrect.（）

A:PhysicsisoneofthemostfundamentalscientificdisciplinesB:PhysicsexistseverywhereandeverydayC:PhysicsconcernsthephenomenafromcosmosdowntoatomsD:Physicsisthenaturalscience

答案:ABCDWhichofthefollowingsubjectsareincludedintheclassicalphysics.（）

A:OpticsB:ThermodynamicsC:ElectromagneticsD:Mechanics

答案:ABCDRelativitytheoryandquantummechanicsarethefundamentalsofmodernphysics.（）

A:对B:错

答案:A

第二章测试

Abottleofwateris500ml,instandardunits,whichis（）

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

答案:AAvectorwithamagnitude10andangleto+yaxis,whichcanbewrittendownas（）。

A:B:C:D:

答案:DWhichofthefollowingphysicsquantitiescanbedirectlymeasured.（）

A:speedB:weightC:lengthD:time

答案:BCDWhichofthefollowingequationsaboutvectoroperationsarecorrect.（）

A:B:C:D:

答案:ABCDIftwovectorsareperpendicular,theirdotproductiszeroandtheircrossproducthasthemaximummagnitude.（）

A:对B:错

答案:A

第三章测试

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

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

答案:BAparticlemoveswithaconstantaccelerationfromrestalongxaxis,fromx=0mtox=10min5s.Whatistheacceleration.（）

A:B:C:D:

答案:DInlinearmotion,iftheaccelerationisoppositetotheinitialvelocity,whichofthefollowingstatementsarecorrect.（）

A:ThedistanceforaparticulartimecanbezeroB:ThevelocityataparticulartimecanbezeroC:TheaveragevelocityforaparticulartimeintervalcanbezeroD:Thedisplacementforaparticulartimeintervalcanbezero

答案:BCDThemotionequationofaparticleis.At,whichofthefollowingresultsarecorrect.（）。

A:velocityB:accelerationC:accelerationD:velocity

答案:CDInlinearmotion,ifthevelocitydoesnotchangeitsdirection,themagnitudeofdisplacementwillbeequaltothedistance.（）

A:对B:错

答案:A

第四章测试

Aparticlemovesfromthepositionmtomin2s.Whatistheaveragevelocityofthismotion（）。

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

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

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

答案:AForatwo-dimensionalvelocity,thechangeofvelocitymayhappenas（）。

A:changeofbothandB:changeofC:changeofD:changeoftheanglebetweenand

答案:ABCDAparticleundergoesauniformcircularmotion.Whichofthefollowingstatementsarecorrect.（）。

A:ThemagnitudeofdisplacementequalstothedistanceforanytimeintervalB:TheradialcomponentofaccelerationiszeroC:ThetangentialcomponentofaccelerationiszeroD:Themagnitudeofvelocityequalstothespeed

答案:CDForaprojectilemotionfromtheground,themaximumlateraldistancecanbeachievedasthelaunchingangleis.（）

A:对B:错

答案:A

第五章测试

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

A:B:C:D:

答案:CTwoparticleswithmassandcanbeacceleratedbyaconstant10-Nforce,Ifnootherforcesandtheratiooftheiraccelerationsare2:1,whatistheratiooftheirmasses.（）

A:B:C:D:

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

A:TheparticlemoveswithaconstantspeedB:TheparticlemoveswithaconstantvelocityC:TheparticleisatrestD:Theparticlemoveswithaconstantacceleration

答案:BCAccordingtoNewton’sthirdlaw,whichofthefollowingstatementsaboutaction-reactionforcepairsarecorrect.（）

A:TheyhavethesamemagnitudeandsamedirectionB:TheyhavethesamemagnitudebutoppositedirectionC:TheycanactonthesameobjectD:Theymustactontwodifferentobjects

答案:BDNewton’slawscanbeappliedtobothinertialandnon-inertialframes.（）

A:错B:对

答案:A

第六章测试

A2-kgparticlemovesfromvelocityto.Whatistheworkdonebythenetforce.（）

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

答案:CA2-kgparticleisprojectedfromatableofheight3m,withaspeed5m/s.Whatisthemechanicalenergyoftheparticleasitdropsdowntotheheight2m.（）

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

答案:BInwhichofthefollowingmotions,theworkbythenetforceiszero.（）

A:uniformcircularmotionB:motionwithconstantaccelerationC:freelyfallingmotionD:motionwithconstantvelocity

答案:ADInwhichofthefollowingsituations,themechanicalenergyisconserved.（）

A:projectilemotionB:onlyconservativeforcesdotheworkC:ablockfreelyfallingandcompressingaspringD:ablockmovingonaroughsurface

答案:ABCIfnon-conservativeforcesdothework,bothmechanicalenergyandtotalenergyarenotconserved.（）

A:错B:对

答案:A

第七章测试

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

A:B:C:D:

答案:DA5-kgblockwithavelocitycollideswitha10-kgblockatrest.Ifitisaperfectlyinelasticcollision,whatisthefinalvelocityofthetwoblocks.（）

A:B:C:D:

答案:BInelasticcollision,whichofthefollowingphysicsquantitiesareconserved.（）

A:momentumofeachparticleB:kineticenergyofthesystemC:momentumofthesystemD:kineticenergyofeachparticle

答案:BCIfthemomentumisconservedforasystem,whichofthefollowingstatementsarecorrect.（）

A:nointernalforcesinthesystemB:zeroexternalforceactingonthesystemC:internalforcesoneachotherformingaction-reactionpairsD:zeroforceactingoneachparticle

答案:BCForconservationofmomentum,theinternalforcescanonlybeconservativeforces.（）

A:错B:对

答案:A

第八章测试

AuniformdiskofmassMandradiusR,whatistherotationalinertialastheaxisperpendiculartothediskandpassingthroughitsedge.（）

A:B:C:D:

答案:AAuniformrodofmassMandlengthLrotateswithanangularspeed.Iftheaxispassingthroughitsoneend,whatistheangularmomentum.（）

A:B:C:D:

答案:BAparticleofmassrotateswithanangularspeed，andadistancetotherotationalaxis.Whichofthefollowingequationsarecorrect.（）

A:radialaccelerationB:angularmomentumoftheparticleC:linearspeedoftheparticleD:kineticenergyoftheparticle

答案:BCDWhichofthefollowingstatementsaboutrotationalinertiaarecorrect.（）

A:TheobjectwithlargermassmusthavelargerrotationalinertiaB:TheparallelaxistheoremcanbeusedtocalculaterotationalinertiaC:TherotationalinertiacanbedifferentfordifferentaxisD:Theminimumrotationalinertiaappearsastheaxisthroughthecenterofmass

答案:BCDThetorqueonparticleisduetothenetforceonthatparticle,includingbothinternalandexternalforces.（）

A:错B:对

答案:B

第九章测试

Anoscillatortakes10sfor5revolutions.Whatistheangularfrequencyofthisoscillation.（）

A:B:C:D