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首页 初中动能和势能课堂练习题(含答案)

初中动能和势能课堂练习题(含答案).doc

初中动能和势能课堂练习题(含答案)

穷人家的孩子就是早当家
2017-10-19 0人阅读 举报 0 0 暂无简介

简介:本文档为《初中动能和势能课堂练习题(含答案)doc》,可适用于综合领域

初中动能和势能课堂练习题(含答案)《动能和势能》练习题(一)动能跟质量和速度有关机械能重力势能跟质量和高度有关势能弹性势能跟弹性和弹性形变有关一填空题动能是指物体由于而具有的能其大小与物体的和有关势能包含势能和势能两种物体由于被举高而具有的能叫做势能它与物体的和有关物体由于发生而具有的能叫做势能它的大小与有关我们常用的能量单位是用字母来表示判断下列物体是否具有动能或势能如果有说出能量的名称如果没有说明原因(在水平地面上滚动的铅球:悬挂在室内的电灯:玩具汽车中被卷紧的发条:弹簧:在空中飞行的波音客机:静止在水平轨道上的列车:(高速升空的火箭被拉弯的钢板尺被水电站拦河坝拦住的上游水空中下落的皮球质量较大的喜鹊与质量较小的燕子在空中飞行如果它们的动能相等那么飞得快(如果卡车空载和满载时都以同样的速度行驶那么空载时具有的动能满载时具有的动能(停放在山顶上的卡车具有的重力势能该卡车下山时具有的重力势能((选填“大于”、“小于”或“等于”)如图所示一个同学在蹦床上玩从跳起到上升至最高点的过程中能逐渐增大能逐渐减小。图如图所示在“研究物体动能与哪些因素有关”的实验中将A、B、C三小球先后从同一装置的h、h、h高处滚下(m,m,mh,hABCABCAC,h)推动纸盒运动一段距离后静止。B()要研究动能与质量的关系我们要选择两图来进行比较。()从图中可以看出A、B、C三个小球刚到达水平面时球的动能最大。图二选择题关于能的概念下列说法正确的是()A(用线悬挂着的物体它没有做功它不具有机械能B(在空中飞行的子弹因为它能做功所以它具有机械能C(甲物体的运动速度比乙物体的大则甲物体的动能一定比乙物体的大D(甲物体的高度比乙物体的高度大则甲物体的势能一定比乙物体的大跳伞运动员在空中匀速下落的过程中他的()A(动能增大势能不变B(动能不变势能减小C(动能、势能都不变D(动能减小势能增大司机开车上坡前往往加大油门以提高汽车的速度这是为了()A(增大动能B(增大势能C(增大惯性D(减小阻力年月日西昌卫星发射中心用“长征四号乙”运载火箭成功地将‘“神州六号”飞船送人太空。在飞船随火箭一起离开发射塔飞向天空的过程中()A(飞船的势能不断减小动能不断增大B(飞船的势能不断增大动能不断减小C(飞船的势能和动能都在不断减小D(飞船的势能和动能都在不断增大三峡水库修建大坝为了提高水位增加水的()A(内能B(重rtymembersintothepartyorganizationinPartyactivities,organizationandmanagement,theorganizationofcare,toacceptthesupervisionoftheorganization,andactivelyplayaroleSecond,wemustpaycloseattentiontotheteamconstructionCatchteam,withtheteampartybuildingisanimportantcontentandbasiclevelpartyorganizationteamwithmembersshallcomplete,cleardivisionoflabor,responsibilityimplementation,implementationofpostmanagementWithagoodteamwithastrongPartySecretary,toeffectivelystrengthentheSecretaryofthepartyorganizationisthePartyofpersonofthefirstresponsibility,senseofresponsibility,theresponsibilitysystemtoprevent"partyconstructiontaskofPartybuilding,Partybuildingworkandbusinesstwoskins"phenomenonThird,weneedtoplaygoodbattlefortactionPartyorganizationsatalllevelstoeffectivelyseizeasakeylinkinthecenterofthepublicsecurityworkservice,adheretothedingTothecompletionofdifficultandperiloustaskasthemainbattlefieldoftheworkofPartybuildingandtheencountermajoremergenciesandmajorrescuemission,amajorsecuritytasks,themoreyouwanttoplaythecoreroleofPartyorganizations,andearnestlydoagoodjobintheprewarmobilization,wartimemotivation,postwarentitledworktrulywherethebattleofPartymembersandcadres,theparty'sorganizationallifeextendedtowhere,theroleoffightingbastionofthepartyorganizationsplaywhere,reflectingthepartybuildingworktopromoteandprotectthepowerComrades,inthecircumstancestopromotecomprehensivestrictlynewsituation,doagoodjobofpublicsecurityPartyBuildingworkasthetaskisarduousandgloriousmission,hopeeveryonetofirmlyestablish"agameofchess,"thought,putdownRealstrictlyrequiredasthenewnormalorganoftheparty'sconstruction,furtheremancipatethemind,ningxinjuli,dosolidwork,tomaintainsocialstability,promotesocialfairnessandjustice,protectthepeopleliveandwork,tomakenewandgreatercontributionsTheaccidentsceneoftheaccidenttreatmentofXXXX,ApriltoApril,accordingtotrafficpolicedetachmentandthetrafficpolicebrigadeofthearrangement,IhadthehonortoparticipateintheMinistryofPublicSecurityResearchInstituteheldhighendtrainingclass,bydaysoftrainingandlearning,Ihaveadeepfeeling,learningalotofnewknowledgeandtodealwiththeaccidentofskills,tolearnandworkareofgreathelp,wewillexperienceissummedupasfollows:first,studythenewknowledge,toexpandthefieldofvisionIntheresearchtheteachertoexplain,wereviewthe<roadtrafficaccidentscenedrawing>,andemphaticallystudiedatthesceneoftherealrecorddrawingstandards,thegraphcanreflectthestateandeachelementFullcoverageregardlessofsize,position,giveapersontoliveamoreintuitiveunderstandingofthenextstepaccidenttreatmenthasagreathelpAtthesametime,Ihaveseensomenewaccidentinvestigationequipment,suchasanewgenerationoftrafficaccidentscenedrawingsystem,throughtraining,thepolicecanveryfastrenderingstandardsitemap,datameasurement,andinaccordancewiththeMinistryofpublicsecurityofthestandard,andtheUAV,theapplicationofUAVcameraorcamera,fromthefundamentalsolutionoverviewaccidentphotosSecond,onthescenephotographybasicrequirementsandaccidentphotographicdifferenceThescenephotographysceneisthemostobjectiverealreactionButphotographsofthescenetakentoensureobjective,comprehensive,timelyandclearrequirements,thisscenephotostoassuranceitslegaleffectthescenephotographyhasalsoundergoneachangebytheoriginalphotographyoforientationandoverviewofphotography,PhotoCenter,breakdownofthephoto,changeforrangephotography,photographicoverview,localcamera,filmelement,photographyofminutia,thanphotography,sotophotographiccontentmorerefined,morespecific,theasevidenceofamoretargeted,moreaccurate,onsitesurveyextractedtracesandfieldexplorationprocesstracesareextractedbytheproblemsanderrorsTraceonthesceneofthediscoveryandextractionasamatterofSothesceneinvestigationisanimportantpartoftheprocess,ontheanalysisofthecauseoftheaccidentandtheaccidentareveryimportantrole,throughtheteacher'sexplanationandanalysisthemasanexpert,fromtheperspectiveofidentificationoftracesofthescenepointsextractionandpointedoutthedirectionforunderourownexplorationsitetoextracttraces,atthesametime,throughtheteacher'sexplanation,accidentswillproducecertaintraces,whichrequiresusinthesceneoftheaccidentinvestigationofcareful,andnotmissinganyusefultoourtraceonthesceneOnadvancedequipmentoftrafficaccidentidentification,geneticanalysisoftheroleofIfeelthedeepestisnowhomeCarsafetyairbagwithsomethingcalledtheairbagmoduleThisisknownas"blackbox"carequipment,hasarecordofwhenthespeed,whethertotakebraking,takeafewbrakingandotherdata,recording,hasaverylargeroleforanalyzingthecauseoftheincident,nextseriousaccidentsmustpayattentiontoextractsuchequipmentandescapeaccidentsarecommoninthegeneralvideosurveillanceontheblurredimage,wLicenseplatenumbershellac,fiberidentification,etcwithadvancedequipmentcanmaketheidentification,withtheadvancedequipment,technicalbacking,feelingtheimpartialhandlingoftheeachaccidentandescapedetectionaccidentconfidenceOnthesceneoftheaccidentprotectionTheteacherfromthreeaspectstoexplaintheroadtrafficaccidentandlawenforcementdutysitesafetyprotection:,fromtheleveloflawsandregulations,Ministryofpublicsecurity,proceedingfromtheactualconditionspromulgatedontherulesandregulationstostrictlyenforced,whichrequireseachofusapolicestartingfromtheirownpointofview,fortheirownsafety,mustnotomitanylink,don'tbeafraidoftrouble,thisisListsarenotqualifiedforyoualoneareresponsiblefortheunitisresponsibleforthefamilyisresponsibleforStrengthenonsiteprotectionfacilitiesoftheconfigurationanduse,thefirsttobuyandconfigurationofsafetyprotectionequipment,ifequipment,butalsoaboutwhatdoorThenisanotherquestion,equipment,howtouse,theteacherofTianjinaccidentlesson,becausealotofequipment,isnotputintouse,resultinginourpoliceduetothelackoftimelyreminderoftheaccident,causingustoanumberofpolicecasualties,thedeviceisputintouse,butalsostrengthenindividualprotectionskillsandteamworktrainingInaword,Wewanttousequalifiedequipmentandabidebylawsandregulations,strengthentrainingofpersonalskillsandteamworkandensureitsownsecurityinthefieldstaffThroughthestudyoffivedaysoftraining,anincreaseofknowledge,learningthesomethingnew,strengthentheunitandbrotherofbusinessflow,alsofoundtheirownshortcomings,thenextstepIwanttoshareofWuxiadvancedconceptsandcolleagues,commonlearningandcommonprogress,makesthetrafficpolicebrigadeaccidenttreatmentworkmoreonthefloor!Inrecentyears,XXcityalwaysadheretoahandgraspingthebuilding,ahandgraspthemanagement,andactivelyexplorenewmodeofBiogasService,strivetoinnovatenewmechanismforecologicalcompensation,payattentiontoenhancetheimageofthenewenergyteam,cohesiontocreateanewbrightspotofcircularagriculture,biogasinscientificmanagement,comprehensiveutilizationandachievedcertainresultsFirst,thecultivationofnewbusinessentities,toexplorenewmodeoffollowupservicesXXcityhasbeenbuiltbiogasmillionhouseholds,biogasdigestersis"treasurepool,biogasreplacedthecoalandfirewood,becomeaclean,economiclifeenergy,biogaspoolinsteadoftheoldcesspool,becometoimprovethesanitaryconditionsofimportantpossessionsWiththemaintenancequantityisincreasingyearbyyear,firedampfollowupserviceintothelongstandingproblemTodoagoodjobofBiogasService,polishupthebrandof"XXmodelandweguidebiogasmechanicestablishedbiogascooperation,energyservicecompanies,suchasthemodelofmarketmainbodyThroughmarketservice,breakthroughinthepastbythegovernmentconstruction,maintenance,apackintheendofthenarrowconcept,establishthe"whobenefits,whomanagement"thecorrectconceptThemainbodyofthenewtakeinnovativeservicemode,expandservicecontentandothermeasures,developingbiogasservice,centralizedgassupplypipelineconstructionandgaschargingoperationandotheraspectsofcomprehensivemanagementItnotonlysolvestheproblemoffarmhouseholdbiogas,andchangethefollowupservices,butalsoincreasestheincomeofserviceteamThecultivationofnewsubjects,toconsolidateandimprovetheservicesystem,theeffectiveestablishmentofalongtermmechanismofbiogasservices,toachievethestandardizationofthefollowupservices,intensiveandprofessionalTwo,theintroductionofinternationalcarbontrading,innovativenewmechanismforecologicalcompensationXXCityXiangBaiGuocentripetalrichisanordinaryfarmersbiogas,biogashishomewithverygoodresults,heiscarbonfundprojectoffarmers,thisyear,thewinneroftheNetherlandsgovernmenttopayhimthehichcanidentifyInspiredbytheintroductionof$,heusedthiscarbontradingincometobuyanewgasstoveThisisXXhouseholdbiogascleandevelopmentmechanismprojectistheUnitedNationsfirstsuccessfullyregisteredhouseholdbiogascarbonfundprojectTheprojectofhouseholdbiogaspool,eachyeartoreducecarbonemissionsintons,carbonemissionstradingincomeofmillionUSdollars,equivalenttoRMBmillionyuan,carbontradingincomesubsidiestobuildpoolfarmerforbiogasdigestersfollowupmaintenanceprovidesongoingcapitalinvestmentincarbonfundproject,XXCity,theimplementationofthe"gasrewards"project,"whetherthenormalignition,gaspressuresize,pigherdsheadnumberIndicatorswillbiogasdigesterusingeffectisgood,mediumandpoortorefinethemanagementandpostingtheuseoffarmhouseholdbiogas,biogasusegoodfarmersrewardEcologicalcompensationprojectimplementation,increasetheincomeoffarmers,mobilizetheenthusiasmoffarmers,increaserateoftheuseofbiogas,atthisstagefortheimplementationofthevoluntaryemissionreductionprojectstoprovideareferenceThree,establishanadvancedservicemodel,highlightingthenewimageoftheenergyteamRepeatedlysincethetechnologyofbiogasdigesters"thirdbuiltsevenincharge,notgoodwillbe"ayear,twoyears,threeyearsfouryearskeepfrogsTocatchthefollowupservice,tocatchtheteamXXCityinstrengtheningtheteambuildingprocess,theemergenceofanumberofservicemodelsandtechnicalexpertsDragonandPhoenixTownAgriculturalServiceCenterofYuanLiang,isatypicalrepresentativeHefromyearsengagedingas,tenyearsasoneday,alwayskeepthepeopleofnoblesentiment,conscientiouslyperformtheirdutiesconscientiouslyservethemassesHisadvanceddeedsofpeople'sdaily,thefarmerdaily,HubeiDailyandothermediareportedthatwasnamedtheprovinciallaborModel,bytheDeputySecretaryoftheprovincialPartycommitteeZhangChangerastheneweraofShiChuanxiang,YuanLiangwithhisdedicationtothecauseofthegas,wonthemajorityofpeoplegoodreputationVigorouslypromotethetypicaldeeds,strengthentheplayIncentivemotivation,thecity"foreveryonetolearnadvanced,allvyingfortheadvanced,everyonecatchupwithandsurpasstheadvanced"hasbecomesorampant,theteamhasthetypical,postapacesetter,setupthecity'sruralenergyteamforthegoodimageofthecivilserviceFour,topromotethedevelopmentofcircularagriculture,buildacomprehensiveutilizationofanewbrightspotTable,animportantroleintheprofoundunderstandingoftheecological"XX"fromtheecologicalagriculture,XXcitytobiogasdevelopmentofecologicalagriculture,alwaysadheretotheconstructionofbiogasenergylineoverallcirculationagriculturedemonstration,inaccordancewiththe"gasintopeople'shomes,freeinstallation,accordingtothecharges,comprehensiveutilization"principle,vigorouslycarryoutthecentralizedgassupply,recyclingforthepurposeofbiogasengineeringconstructionOneistocarryoutmultidemonstrationThedragonandPhoenixTown,TunXiangBaiGuoXiang,theconstructionofthebiogasengineeringasalinktothe"pigbiogasvegetable","pigbiogastea","pigbiogasfruit"cycleofagriculturaldemonstrationbase,throughavarietyofexperimentsanddemonstrations,summarizetestresultAndpromotionofdemonstrationexperienceThesecondistoenhancethequalityThecityinbiogasproductionandutilization,researchanddevelopmentof"highyieldbiogasfermentationdeviceandseleniumenrichedbiogasfertilizerproductionmethod"isStateIntellectualPropertyOfficeofthegrantofthepatentright,toenhancetheleveloftechnologyofthecityofBiogasfertilizeruseThethirdistoexpandtheuseoftheareaAccordingtolocalconditions,duetoimplementthestrategy,thefollowupservicesofbiogasandbiogascomprehensiveutilizationoforganiccombination,tosolvethe"plantingnobiogaspool","biogaspoolornotinthelaborforce",practicalproblemssuchas"laborwithoutcultivation",letbiogasfertilizerwasincirculationandutilizationThenextstep,XXcitywillinaccordancewiththeprovincial,stateenergydeployment,andfurtherincreasetheeffortstotheconstructionofbiogasproject,toaccelerateruralbiogastothescaleofdevelopment,comprehensiveutilizationandscientificmanagementinthedirectionoftransformationandupgrading,promotethesustainabledevelopmentofbiogasinruralareasInrecentyears,underthesupportandguidanceoftheprovincialruralenergyoffice,thecountycompletedatotalofhouseholdbiogaspoolnearlymillionhouseholds,largescalebiogasproject,smallandmediumsizedbiogasprojectin,ruralserviceoutlets,subsidiesforsolarwaterheater,biomassstoveunits,forthedevelopmentofgreenagriculture,improvethepeople'squalityoflifeplaygreatroleInparticular,wesucceedinbiogaspurification,highvalueutilizationbasedon,tofurtherexpandthescale,toopenupthemarket,standardizedmanagement,topromotethetransformationandupgradingofruralbiogasprojectmadesomeactiveexplorationOurapproachtoreportasfollows:One,scaledevelopment,playtheeconomicandsocialbenefitsofhighqualityofmethaneutilizationBiogashighqualityexploitinspirednewruralofourcountry'senergymarket,forinstallationofgaspipelineengineeringofnewruralresidentialdemandSincelastyeartheprovince'sruralbiogashighqualityusingafterthespot,webasedonthebasis,toexpandthescale,anamplesupplyofgassource,toensurethatfarmerswithadequatequalityofbiogasOneistoexpandthesizeoftheoriginalbaseLastyearheldaspotofQianfengcountyandintheprovinceofruralenergyoffice,countygovernmentsupport,intheoriginalacresoftheprojectonthebasisof,toratifythenewacresofland,accordingtolargescalebiogascentralizedgassupplyengineeringconstructionrequirements,investmillionyuantobuildamvolumeofanaerobicfermentationtank,theimplementationoftechnicalinnovation,usingcarbonsteeloutputpipeline,buildingtogasmabovethenewholder,andcompletetherelatedprojects,assurancethathavebeendevelopedtofarmerswiththesupplyofgas,SpringFestivalpeakgasduringTherehavebeennointerruptioninsupply,theuseroftenSatisfactionSecondistoactivelyopenupnewbasesThisyear,wethroughthecomprehensivedeploymentofthecountygovernment,relatedtotheintegrationofsectorfunds,inPuZhenZhangZhuangSonglinfarm,theporttownofgoldfarmingcooperatives,planstobuildtwomvolumefermentor,copyforwardmode,solveenvironmentalpollution,fruittreesfertilizer,lifeproblemswithgasWewillalsounderthesupportofrelevantdepartments,theforwardmodeislaunchedcountypublicsecurity,withconditionsinothercounties,willingnessofbiogasengineeringbase,toassistintheconstructionofgascompressionpurificationequipmentandproductionandmarketingintegrationmodeAtpresent,Qianfengcompanyhasbeendeclaredabiogaspurification,compressionandcanninganumberofutilityTechnologypatents,inventionpatents,hasappliedforaregisteredtrademarkofthestriker,andwiththeequipmentmanufacturerstoimprovetheequipmentstereotypesandproductionandbusinesslicenserelatedworkFile,identitytoaccesstoawiderangeofmeasurestoimplementadecentralized,andthird,wewillsteadilydevelopthemarket,weforwardthecompanytogethertoformateam,thepublicsecuritycounty,Nanping,lotuspondgatethreetownresidentialareadevelopment,jointconcentratedpropaganda,furthermobilizeandorganizefarmerstobaseinspection,totheuser,enhancetheperceptualknowledge,sothatthemajorityofusersofbiomassgasfromignorance,doubt,andthesafe,convenient,economicalandpracticaladvantagesofconvinced,blownawayAtthesametime,begintoruralareamarketdevelopment,MengZhenJinGangCunZhaKouZhenDeYiVillagepilot,thebiomassgassupplyfarmers,letoldpeople'slivesimprovegradesPopularsupport,thisyear,hasaddedusersInthecommercialsector,hasalsodevelopedmorethanfoodandbeverageindustryusers,theamountofgasisequivalenttociviliangasconsumptionTwo,makeaninventoryofthestock,toplaytheroleofhighqualityoftheuseofBiogasRectificationhasbeenbuiltinthebiogasproject,theuseofmobileintegratedcompressionpurificationequipment,thenearestgasrecovery,thenearestdistribution,improvetheuseoftheoriginalbiogasprojecteffect,givefullplaytotheroleofhighqualityandrevitalizethProvince'sruralmarshgaswithhighqualityuseafterthespot,weorganizedaspecialgroup,onthebasisofafullrangeofinvestigationandresearch,andforwardthecompanytogetheronthecounty'sthreelargeandmediumsizedanaerobicfermentationtankberenovatedandthroughtechnicaltransformationtorestoregasproductioncapacity,buildingintegratedmobilecompressionpurifiedgasrecoveryequipment,gasrecoveryatthepriceofoneyuanpercubicmeterbystrikercompanyrecoveryBothsideshavecertaineconomicbenefits,notonlystarttheutilizationofwastefermentationtank,butalsosavesthecostofnewfermentationtank,achieveawinwinresultsTransformationofconcentratedresidentialaboveatthesametime,wealsothecountynearlymvolumefermentationtank,technologicaltransformation,theuseofforwardthecompany'sequipment,sothattomakefulluseoftheconditionsareripefortheDistrict,weusesmallequipmentforpurificationofdirectsupply,theuseoftheuserdirectlywithcleanandhighqualityrawmaterialgas,deeplywelcomeForexample,weinZhangTianSiZhenChangChunCunresidentialareagasinvestmentlessthanmillionyuan,tomorethanusersforthenaturalgasThroughtheentireoldbuildingsandbuildingnew,oneortwoyearstocoverthewholecounty,andtrulylettheruralbiogasupgradingworkimplemented,resultingingreatersocialbenefitsandeconomicbenefitsThree,comprehensiveutilization,toplaythekeyroleofbiogasprojecttoboostgreenagricultureConsumptivestrikerinmycountyisplanting,livestockandpoultry,aquaticCounty,accordingtostatistics,thecountypigherdsmillionhead,poultrykeptcagedmillion,largescalefarmsandfarmingdistrictmorethan,animalmanureandsewageemissionsmilliontons,aquacultureandenvironmentalprotectionpressureInthecountygovernment'ssupport,wehavemorechannelstoraisefunds,thebiogasprojectnearthebaseofthefivetownsmorethanalivestockandpoultryfarmmanurerenovationtoachieveseparationofdryandwet,andeachfarmroadrepair,thecompanyandtheaquaculturefieldsignedagreement,theimplementationofpaidserviceOntheonehand,tosolvetheenvironmentalpollutionproblems,toensurethatthelivestockandpoultrybreedingThehealthydevelopmentoftheindustry,ontheotherhand,toensuretheQianfengcompanyproductionofbiomassgasrawmaterials,caneffectivelyreducethecostInthetreatmentofbiogasslurryandresidue,weequiptheafullautomaticdripinjectionandsprayingfertilizationsystem,biogasslurrydestinedforthevegetablefruitbase,throughthepipenetwork,theuseofautomationinprocessofsprinklerirrigationandachievesmallinvestment,biggainsineffectCombinedwithbiogascentralizedsupplythroughtheestablishmentofbiogashouseholds,biogascomprehensiveutilizationdemonstrationarea,fanoutfrompointtoarea,toexpandthescale,givefullplaytothecommercial,biogasfertilizerfertilizethesoileffectComprehensiveutilizationofagriculturalstructureadjustmenttoconstructionofbiogasasalink,promoteaquaculture,drivenbyplantingindustrydevelopment,andvigorouslypromotethe"pigMarshfruit,pigMarshfood,pigMarshFish"greenmode,tocreateecobrand,organicbrandOverthepasttwoyears,wemetwithXingLongecologicalfarm,DorianvegetablecooperativesandJinGanggrapebasejointlyinvestedmorethanmillion,tobuildthree"threenaturalponds"comprehensiveutilizationprojectpilot,theeconomicbenefitisobvious,vegetablegrowersofidentityAndpraiseAlthoughwehavedonesomeworkontheuseofbiogasinhighquality,butaccordingtoindustrystandardsandmarketoperationrequirementstherearemanyproceduresneedtocomplete,weurgethedepartmentpaymoretogiveguidanceandsupport,toensurethatruralbiogashighqualityuseofstandardization,scale,standardizationandrapidlytotheprovince,andstrivetopromotethecountryestoc
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