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CollegePhysics智慧樹(shù)知到課后章節(jié)答案2023年下中國(guó)礦業(yè)大學(xué)中國(guó)礦業(yè)大學(xué)
第一章測(cè)試
Whatistheatomicscaleinnature.()
A:mB:mC:mD:m
答案:m
Whatisthecosmicscaleinnature.()
A:mB:mC:mD:m
答案:m
Whichofthefollowingstatementsaboutphysicsarecorrect.()
A:PhysicsisoneofthemostfundamentalscientificdisciplinesB:PhysicsconcernsthephenomenafromcosmosdowntoatomsC:PhysicsisthenaturalscienceD:Physicsexistseverywhereandeveryday
答案:Physicsisoneofthemostfundamentalscientificdisciplines;Physicsconcernsthephenomenafromcosmosdowntoatoms;Physicsisthenaturalscience;Physicsexistseverywhereandeveryday
Whichofthefollowingsubjectsareincludedintheclassicalphysics.()
A:OpticsB:ThermodynamicsC:MechanicsD:Electromagnetics
答案:Optics;Thermodynamics;Mechanics;Electromagnetics
Relativitytheoryandquantummechanicsarethefundamentalsofmodernphysics.()
A:錯(cuò)B:對(duì)
答案:對(duì)
第二章測(cè)試
Abottleofwateris500ml,instandardunits,whichis()
A:0.05B:0.005C:0.5D:0.0005
答案:0.0005
Avectorwithamagnitude10andangleto+yaxis,whichcanbewrittendownas()。
A:B:C:D:
答案:
Whichofthefollowingphysicsquantitiescanbedirectlymeasured.()
A:timeB:weightC:lengthD:speed
答案:time;weight;length
Whichofthefollowingequationsaboutvectoroperationsarecorrect.()
A:B:C:D:
答案:;;;
Iftwovectorsareperpendicular,theirdotproductiszeroandtheircrossproducthasthemaximummagnitude.()
A:錯(cuò)B:對(duì)
答案:對(duì)
第三章測(cè)試
Aparticlemovesalongxaxis,fromx=0mtox=10mandthenbacktox=5m.Whatarethedisplacementsanddistancedofthemotion()
A:B:C:D:
答案:
Aparticlemoveswithaconstantaccelerationfromrestalongxaxis,fromx=0mtox=10min5s.Whatistheacceleration.()
A:B:C:D:
答案:
Inlinearmotion,iftheaccelerationisoppositetotheinitialvelocity,whichofthefollowingstatementsarecorrect.()
A:TheaveragevelocityforaparticulartimeintervalcanbezeroB:ThevelocityataparticulartimecanbezeroC:ThedisplacementforaparticulartimeintervalcanbezeroD:Thedistanceforaparticulartimecanbezero
答案:Theaveragevelocityforaparticulartimeintervalcanbezero;Thevelocityataparticulartimecanbezero;Thedisplacementforaparticulartimeintervalcanbezero
Themotionequationofaparticleis.At,whichofthefollowingresultsarecorrect.()。
A:accelerationB:velocityC:accelerationD:velocity
答案:acceleration;velocity
Inlinearmotion,ifthevelocitydoesnotchangeitsdirection,themagnitudeofdisplacementwillbeequaltothedistance.()
A:錯(cuò)B:對(duì)
答案:對(duì)
第四章測(cè)試
Aparticlemovesfromthepositionmtomin2s.Whatistheaveragevelocityofthismotion()。
A:m/sB:m/sC:m/sD:m/s
答案:m/s
Aparticlemoveswithaconstantacceleration.Ifitsinitialvelocityism/s,whatisthevelocityoftheparticleatt=2s.()
A:m/sB:m/sC:m/sD:m/s
答案:m/s
Foratwo-dimensionalvelocity,thechangeofvelocitymayhappenas()。
A:changeofB:changeofC:changeoftheanglebetweenandD:changeofbothand
答案:changeof;changeof;changeoftheanglebetweenand;changeofbothand
Aparticleundergoesauniformcircularmotion.Whichofthefollowingstatementsarecorrect.()。
A:TheradialcomponentofaccelerationiszeroB:ThemagnitudeofvelocityequalstothespeedC:ThemagnitudeofdisplacementequalstothedistanceforanytimeintervalD:Thetangentialcomponentofaccelerationiszero
答案:Themagnitudeofvelocityequalstothespeed;Thetangentialcomponentofaccelerationiszero
Foraprojectilemotionfromtheground,themaximumlateraldistancecanbeachievedasthelaunchingangleis.()
A:對(duì)B:錯(cuò)
答案:對(duì)
第五章測(cè)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:TheparticlemoveswithaconstantspeedB:TheparticlemoveswithaconstantaccelerationC:TheparticlemoveswithaconstantvelocityD:Theparticleisatrest
答案:Theparticlemoveswithaconstantvelocity;Theparticleisatrest
AccordingtoNewton’sthirdlaw,whichofthefollowingstatementsaboutaction-reactionforcepairsarecorrect.()
A:TheyhavethesamemagnitudeandsamedirectionB:TheymustactontwodifferentobjectsC:TheycanactonthesameobjectD:Theyhavethesamemagnitudebutoppositedirection
答案:Theymustactontwodifferentobjects;Theyhavethesamemagnitudebutoppositedirection
Newton’slawscanbeappliedtobothinertialandnon-inertialframes.()
A:對(duì)B:錯(cuò)
答案:錯(cuò)
第六章測(cè)試
A2-kgparticlemovesfromvelocityto.Whatistheworkdonebythenetforce.()
A:22JB:16JC:12JD:36J
答案:12J
A2-kgparticleisprojectedfromatableofheight3m,withaspeed5m/s.Whatisthemechanicalenergyoftheparticleasitdropsdowntotheheight2m.()
A:33.8JB:44.6JC:64.2JD:83.8J
答案:83.8J
Inwhichofthefollowingmotions,theworkbythenetforceiszero.()
A:freelyfallingmotionB:uniformcircularmotionC:motionwithconstantvelocityD:motionwithconstantacceleration
答案:uniformcircularmotion;motionwithconstantvelocity
Inwhichofthefollowingsituations,themechanicalenergyisconserved.()
A:ablockmovingonaroughsurfaceB:onlyconservativeforcesdotheworkC:projectilemotionD:ablockfreelyfallingandcompressingaspring
答案:onlyconservativeforcesdothework;projectilemotion;ablockfreelyfallingandcompressingaspring
Ifnon-conservativeforcesdothework,bothmechanicalenergyandtotalenergyarenotconserved.()
A:對(duì)B:錯(cuò)
答案:錯(cuò)
第七章測(cè)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:momentumofeachparticleB:kineticenergyofthesystemC:momentumofthesystemD:kineticenergyofeachparticle
答案:kineticenergyofthesystem;momentumofthesystem
Ifthemomentumisconservedforasystem,whichofthefollowingstatementsarecorrect.()
A:zeroforceactingoneachparticleB:zeroexternalforceactingonthesystemC:internalforcesoneachotherformingaction-reactionpairsD:nointernalforcesinthesystem
答案:zeroexternalforceactingonthesystem;internalforcesoneachotherformingaction-reactionpairs
Forconservationofmomentum,theinternalforcescanonlybeconservativeforces.()
A:對(duì)B:錯(cuò)
答案:錯(cuò)
第八章測(cè)試
AuniformdiskofmassMandradiusR,whatistherotationalinertialastheaxisperpendiculartothediskandpassingthroughitsedge.()
A:B:C:D:
答案:
AuniformrodofmassMandlengthLrotateswithanangularspeed.Iftheaxispassingthroughitsoneend,whatistheangularmomentum.()
A:B:C:D:
答案:
Aparticleofmassrotateswithanangularspeed,andadistancetotherotationalaxis.Whichofthefollowingequationsarecorrect.()
A:angularmomentumoftheparticleB:radialaccelerationC:kineticenergyoftheparticleD:linearspeedoftheparticle
答案:angularmomentumoftheparticle;kineticenergyoftheparticle;linearspeedoftheparticle
Whichofthefollowingstatementsaboutrotationalinertiaarecorrect.()
A:TheminimumrotationalinertiaappearsastheaxisthroughthecenterofmassB:TheobjectwithlargermassmusthavelargerrotationalinertiaC:TheparallelaxistheoremcanbeusedtocalculaterotationalinertiaD:Therotationalinertiacanbedifferentfordifferentaxis
答案:Theminimumrotationalinertiaappearsastheaxisthroughthecenterofmass;Theparallelaxistheoremcanbeusedtocalculaterotationalinertia;Therotationalinertiacanbedifferentfordifferentaxis
Thetorqueonparticleisduetothenetforceonthatparticle,includingbothinternalandexternalforces.()
A:錯(cuò)B:對(duì)
答案:對(duì)
第九章測(cè)試
Anoscillatortakes10sfor5revolutions.Whatistheangularfrequencyofthisoscillation.()
A:B:C:D:
答案:
Inspring-blocksystem(springconstantandmass),whatisthefrequencyf
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