3 3 能量守恆

文章推薦指數: 80 %
投票人數:10人

力學能守恆1.自由落體:初速度為0、加速度固定為g 2. ... 公斤物體,自距地面20 公尺高處自由落下,當其落下4 公尺時,物體的重力位能與動能比為? SlideShareusescookiestoimprovefunctionalityandperformance,andtoprovideyouwithrelevantadvertising.Ifyoucontinuebrowsingthesite,youagreetotheuseofcookiesonthiswebsite.SeeourUserAgreementandPrivacyPolicy. SlideShareusescookiestoimprovefunctionalityandperformance,andtoprovideyouwithrelevantadvertising.Ifyoucontinuebrowsingthesite,youagreetotheuseofcookiesonthiswebsite.SeeourPrivacyPolicyandUserAgreementfordetails. Home Explore Login Signup Successfullyreportedthisslideshow. Activateyour30dayfreetrial tounlockunlimitedreading. 33能量守恆 0 Share JackHou • Oct.28,2017 • 0likes • 762views DownloadNow Download NextSlideShares Youarereadingapreview. Activateyour30dayfreetrial tocontinuereading. ContinueforFree UpcomingSlideShare 原子的觀念 Loadingin…3 × Facebook Twitter LinkedIn Size(px) Starton ShowrelatedSlideSharesatend Share Email     Topclippedslide 1 1of15 33能量守恆 Oct.28,2017 • 0likes • 762views 0 Share DownloadNow Download Downloadtoreadoffline Science 三上 Readmore JackHou Follow 三上 Readmore Science 原子的觀念 JackHou 基本測量 JackHou 物化變化與放吸熱 JackHou 透鏡成像畫法 JackHou 物質的分類2 JackHou 物質的分類1 JackHou 月相潮汐日蝕月蝕 JackHou 歷屆試題晝夜與四季 JackHou 電動機的原理與構造 JackHou 電磁感應 JackHou 原子的觀念 JackHou 基本測量 JackHou 物化變化與放吸熱 JackHou 透鏡成像畫法 JackHou 物質的分類2 JackHou 物質的分類1 JackHou 月相潮汐日蝕月蝕 JackHou 歷屆試題晝夜與四季 JackHou 電動機的原理與構造 JackHou 電磁感應 JackHou MoreRelatedContent YouMightAlsoLike 右手開掌定則 JackHou 電流的磁效應全 JackHou 電流的磁效應上 JackHou 磁鐵與磁場 JackHou 1.4電流的化學效應 JackHou 1.3電池 JackHou 鋅銅電池 JackHou B6.1.1電流的熱效應(簡介) JackHou Ch4補充 JackHou 串聯與並聯的計算(上) JackHou 4.4電阻歐姆定律上 JackHou 4.3電壓 JackHou 基本電路 JackHou 3.4力矩與靜力平衡 JackHou 32動能位能-下 JackHou 32動能位能-上 JackHou 31功與功率 JackHou 2.3牛頓第三下 JackHou 運動狀態與關係圖 JackHou 2.4圓周運動 JackHou 三上直線運動易錯題解答 JackHou 三上直線運動易錯題 JackHou 23牛頓第三 JackHou 石灰三兄弟 JackHou 背091517 JackHou 萬有引力091517 JackHou WhattoUploadtoSlideShare SlideShare BeAGreatProductLeader(Amplify,Oct2019) AdamNash TrillionDollarCoachBook(BillCampbell) EricSchmidt APIdaysParis2019-Innovation@scale,APIsasDigitalFactories'NewMachi... apidays Afewthoughtsonworklife-balance WimVanderbauwhede Isvcstillathingfinal MarkSuster TheGaryVeeContentModel GaryVaynerchuk MammalianBrainChemistryExplainsEverything LorettaBreuning,PhD Blockchain+AI+CryptoEconomicsAreWeCreatingaCodeTsunami? DinisGuarda TheAIRush Jean-BaptisteDumont AIandMachineLearningDemystifiedbyCarolSmithatMidwestUX2017 CarolSmith 10factsaboutjobsinthefuture PewResearchCenter'sInternet&AmericanLifeProject HarrySurden-ArtificialIntelligenceandLawOverview HarrySurden InsideGoogle'sNumbersin2017 RandFishkin RelatedBooks Freewitha30daytrialfromScribd Seeall TheFirstShots:TheEpicRivalriesandHeroicScienceBehindtheRacetotheCoronavirusVaccine BrendanBorrell (3/5) Free TheSecretLifeofFungi AliyaWhiteley (4.5/5) Free Graceland,AtLast:NotesonHopeandHeartacheFromtheAmericanSouth MargaretRenkl (5/5) Free Committed:DispatchesfromaPsychiatristinTraining AdamStern (5/5) Free AlbertandtheWhale:AlbrechtDürerandHowArtImaginesOurWorld PhilipHoare (0/5) Free TheHummingbirds'Gift:Wonder,Beauty,andRenewalonWings SyMontgomery (5/5) Free SeedtoDust:Life,Nature,andaCountryGarden MarcHamer (5/5) Free TheScienceofTimeTravel:TheSecretsBehindTimeMachines,TimeLoops,AlternateRealities,andMore! ElizabethHowell (3/5) Free MomGenes:InsidetheNewScienceofOurAncientMaternalInstinct AbigailTucker (0/5) Free Chaos:MakingaNewScience JamesGleick (4.5/5) Free TheObesityCode:UnlockingtheSecretsofWeightLoss(WhyIntermittentFastingIstheKeytoControllingYourWeight) JasonFung (4.5/5) Free TheComingPlague:NewlyEmergingDiseasesinaWorldOutofBalance LaurieGarrett (4.5/5) Free Junky:TheDefinitiveTextof"Junk" WilliamS.Burroughs (4/5) Free MaybeYouShouldTalktoSomeone:ATherapist,HERTherapist,andOurLivesRevealed LoriGottlieb (4.5/5) Free HomoDeus:ABriefHistoryofTomorrow YuvalNoahHarari (4.5/5) Free HiddenFigures:TheAmericanDreamandtheUntoldStoryoftheBlackWomenMathematiciansWhoHelpedWintheSpaceRace MargotLeeShetterly (4/5) Free RelatedAudiobooks Freewitha30daytrialfromScribd Seeall SilentEarth:AvertingtheInsectApocalypse DaveGoulson (0/5) Free TheWayofImagination ScottRussellSanders (4/5) Free WorldWarC:LessonsfromtheCovid-19PandemicandHowtoPreparefortheNextOne SanjayGupta (4.5/5) Free SavingUs:AClimateScientist'sCaseforHopeandHealinginaDividedWorld KatharineHayhoe (4.5/5) Free TheExpectationEffect:HowYourMindsetCanChangeYourWorld DavidRobson (5/5) Free PatientZero:ACuriousHistoryoftheWorld'sWorstDiseases LydiaKang (4.5/5) Free OnAnimals SusanOrlean (4/5) Free EndofBias,The:ABeginning:TheScienceandPracticeofOvercomingUnconsciousBias JessicaNordell (3.5/5) Free TheSecretLivesofPlanets:Order,Chaos,andUniquenessintheSolarSystem PaulMurdin (5/5) Free UncontrolledSpread:WhyCOVID-19CrushedUsandHowWeCanDefeattheNextPandemic ScottGottlieb (4/5) Free AWildIdea JonathanFranklin (4.5/5) Free Pump:ANaturalHistoryoftheHeart BillSchutt (3.5/5) Free PastoralSong JamesRebanks (5/5) Free Inflamed:DeepMedicineandtheAnatomyofInjustice RupaMarya (5/5) Free It'sElemental:TheHiddenChemistryinEverything KateBiberdorf (4.5/5) Free QuarantineLifefromCholeratoCOVID-19:WhatPandemicsTeachUsAboutParenting,Work,Life,andCommunitiesfromthe1700stoToday KariNixon (5/5) Free 33能量守恆 1. 力學能守恆 1.自由落體:初速度為0、加速度固定為g 2.單擺運動:最高點速度為0、最低點速度最快 3.彈簧:兩端最慢、中間最快 4.丟出物體 指物體離手之後直到落地 向上、向斜上、水平、向斜下、向下丟出都符合 2. 基本題 質量5公斤物體,自距地面20公尺高處自由落下 ,求落地瞬間物體的動能為? 20m 3. 基本題 20m U=5×10×2 =1000J K=1000J = 1 2 ×5×𝑣2 質量5公斤物體,自距地面20公尺高處自由落下 ,求落地瞬間物體的動能為? 位能全部轉成動能,不需求末速度 4. 基本題 質量5公斤物體,自距地面20公尺高處自由落下 ,當其位能與動能相等時,物體距地面的高度為? 20m 5. 基本題 質量5公斤物體,自距地面20公尺高處自由落下 ,當其位能與動能相等時,物體距地面的高度為? U=最大U的一半 =1000× 1 2 =500 =5×10×h h=10m = 1 2 ×5×𝑣2 K=1000-500 ?m 一半的位能變成動能 任一點的位能+動能=最高點的位能=最低點的動能 6. 基本題 質量5公斤物體,自距地面20公尺高處自由落下 ,當其落下4公尺時,物體的重力位能與動能比 為? 4m 7. 基本題 質量5公斤物體,自距地面20公尺高處自由落下 ,當其落下4公尺時,物體的重力位能與動能比為 ? 16m U=最大位能的 16 20 損失最大位能的 4 20 轉變為動能 8. 基本題 質量5公斤物體,自距地面20公尺高處自由落下,當其落 下4公尺時,物體的重力位能與動能比為? 16m剩下的位能 轉換出的動能 U:K=16:4 =4:1 9. 志隆站在高臺上A點,分別從三個不同的斜面滑下 (忽略摩擦力) 1.過程中是否符合力學能守恆? 2.沿著那一斜面滑行至B點時,重力所作的功最多? 3.沿著哪一個斜面滑至B點之動能最大? 4.到達B點時之速度,以沿哪一個斜面滑下者最大? 觀念題 10. 單擺問題 11. 彈簧問題 平衡位置 ABC A B C 速度為0 K為0 U最大 速度最快 K最大 U為0 12. 以三種不同方式丟出同一球,球離手時的初速度相同 落地瞬間,哪一種方式下球的速度最快? 觀念題 13. 功、能轉換 以不同的方式將同一物體從地面等速度提高2m ,哪一種方式作的功最大? (不考慮摩擦力、空氣阻力) 垂直提起較陡的斜面較緩的斜面 僅思考起點與終點時,物體所含能量的變化 14. 功、能轉換 以不同的方式將同一物體從地面等速度提高2m,哪一 種方式作的功最大?(不考慮摩擦力、空氣阻力) 2aaFW4bbFW6ccFW cbaWWWmghU cbaFFF 作的功全轉變成位能 Fc最省力 0likes × Bethefirsttolikethis Views × Totalviews 762 OnSlideShare 0 FromEmbeds 0 NumberofEmbeds 0 Youhavenowunlockedunlimitedaccessto20M+documents! × UnlimitedReading Learnfasterandsmarterfromtopexperts UnlimitedDownloading Downloadtotakeyourlearningsofflineandonthego YoualsogetfreeaccesstoScribd! Instantaccesstomillionsofebooks,audiobooks,magazines,podcastsandmore. Readandlistenofflinewithanydevice. FreeaccesstopremiumserviceslikeTuneln,Mubiandmore. DiscoverMoreOnScribd × ShareClipboard × Facebook Twitter LinkedIn Link Publicclipboardsfeaturingthisslide × Nopublicclipboardsfoundforthisslide Selectanotherclipboard × Lookslikeyou’veclippedthisslidetoalready. Createaclipboard Youjustclippedyourfirstslide! Clippingisahandywaytocollectimportantslidesyouwanttogobacktolater.Nowcustomizethenameofaclipboardtostoreyourclips. Name* Description Visibility OtherscanseemyClipboard Cancel Save SharethisSlideShare SpecialOffertoSlideShareReaders × TheSlideSharefamilyjustgotbigger.Younowhaveunlimited*accesstobooks,audiobooks,magazines,andmorefromScribd. Activateyourfree60daytrial Cancelanytime.



請為這篇文章評分?