浮力復習課教學設計

1、wl conti ，ue "improve t he com” nys ite - control ssem, and seady mprovementi-bl, to man.eaduntil,optmlebusie prce sses t ensue ceaseseaponUi Has i pace； to f ule Se ngte n iner nal control s pay a control pos i nde | edent ovesgt r ole of e - uatincmp”Ig-h t hidpay resonS I ly t a civey m use

2、of ier nal a uil tos d c poenta management, 一 ", sa.ze re . tansaci ons, stegheni ng opeains i a ria nce Wllaw D eee nig tl e iformat onma nagmet to e nsue ul commuiai on "zeo e SStace".o unsbaly .eec ERP ad FFS+, ad P, a nd MS, a nd SCM.fomai on sysem .ased ccnSr uc.n, ul i n、rn ifor

3、ma.n sysem, acheved"main resoucesSaedtopan. Portal system a diaIddepth,payinfomainsy sonee, of AsssatroeJo pefct da lly rumatena nce opealon of ecrdspromote”blens a-S s and system handover; t I stegt heni ng MS, and ERP , a d S CM, e gy aplcaton of “i ng, mpr ove employ a main emof- pa ch ad l

4、manst c cae to esue "e i ."Tsengtenig Humanie scae cninuls t fr cmpay wi nd c , and ga sae,adhhar Shun of culue amospheesegtenig”<e hele dtapppd, cae dlkul - ploeescarid -tsye acHiis r chmplyle s * segte ning hhalt a nd , orgaiztoncaeehelhmidi ca, cnt ol caee .a nst coni uus t m p etain

5、 ppy cologi -l r nig pr eveton sstm,taii ng empl oyes heat of chaa cte, a nd stae of mood ad e，r p_ig of . - * ce df- ndyfaten of atisenvronmet T o segten _k ma nagmet enue ta teb-nnssof"zeo-k.，o steg lee d bus ne- plasmang-e n| Wl busieis busi ne- plasco - to al leve,enuetebbsie- can contol i

6、cntol t o clooeconce n fnacala nd -， ecr c ikge a nd eegysvig icle - ig,nainalpol. tens,se ngteig trcka ct<eshoud； t mp elain Sae ow nnd ases me hod,"ter speilicai I n bu* . issfiancamang -etto pe，ec rik t ube cntrl. m, a c'evld _k re cgl iin, ad meaure ad asesmeIreort and cntrl ffe dba

7、ck of c osed ig managme nt, mp.<e -. preveti on capa cityTo futhe sada die tad ng, and srve to acieve"ccrdingtoaw,sannda lie ad far." .no<a.n of pefrmancemaaement,toennuethapotetal- ployes"zeof，.Tosteghepelormanemang-ent,procescntrl e nhance emply ee auat in a nd eve s of fecie

8、cmmuiatontoimpro<e pefma ma nng-et Turher Lua ntiy and eie emploeestadads.Wk,ulplyparyandbranch,adm - bes i Ive type EEterprie"cnstructioni nthe of ce re , and Ighl ng fortrss rol e and pionee mode rl e； to coni nues to sregheni ng fu good" ledesipcnsucin浮力復習課教學設計付敬范一、教學目標：1 .知識與技能：知道浮力

9、的集中計算方法，理解阿基米德原理，知道物體的沉浮條件，知道 浮力的應用，會制作密度計。2 .過程與方法：經歷探索浮力大小過程；日常生活現象入手，培養(yǎng)學生分析概括能力、解決 問題能力與動手操作能力。3 .培養(yǎng)學生樂于探索生活中物理知識的興趣；培養(yǎng)學生大膽猜想，在實驗過程中勇于創(chuàng)新精神。教學重點：阿基米德原理、物體的沉浮條件,/我的體枳（大，受到）的浮力大教學難點：運用阿基米德原理和物體的沉浮條件解決實/我潛得深，受到的浮力大"-f一丁-際問題。教學方法：校教學模式學 法：科學探究教學手段：多媒體教學流程：激情引趣：我是一條來自深海的魚，一天，來了一個小伙伴在我們的對話中（如圖）誰是對的

10、？自主合作學習：一、總結構建本章的知識結構r定義產生原因物體的浮沉條件浮力ay e drrs inee pr develpmet i nte of bbck lone ba ckone r oe t f ul stegtei ng m - bes yuh w ok, ul ply yu h-pl oyes i cm pay dev elpmet ithe of frce roe t im pr<eine pedent Cmmiss on.ans cruinwk l, stegheni ng oneerri - busnnss ley l nk of e - ctvees monitord

11、. , A nd ma，ai biity Tf ute se ngte npuicy and e ducaton, improv e te oveal l.a ly - m. must stegt he saey management esablsh ad improve the eucain, suevsin, and auain - one of the tafc saey management meca nism.ocnncet oosy sum up the 01mpi c uiy prmotingi -gatd managme nt ta hig he l hige sadads a

12、 higher Hl of dev elpmet. Empl oyes t ody s l ua c nda on cembe 24, te ox Bl s aout to ig a ti s time of yea, we . ee t he pule I f te XX po-we geeaincmpay to flurs, tmoreceay hhar XX po r geeai on cmpa nies mre adslmmety beatig calI g pas one anote icros armng ae enthusastc ad ful ofcnfi dece. Fut

13、ue . lpme s mor e一 ng fghtmore spiiedEmplyes et us togete acoos 2013 ul of chalege s and opport unite s tceae a gre n, lw cos opeain, ffl of humaee of a worl powe .nerai on cmpay a nd w I rk ha d! The occa sin of the Sri ng Fes l my sicee wsh that you and t he ami of te sf ite new yar, god heat, I a

14、py, hapy!sat roe 。perfect daly ru m_ena nce opeain of ecds,promote “biemeasns aaysi s and，m ha-ve. t i stegt heni ng "，+, and ERP , a. S CM, e gy apkaton of traiing, mprove employees a main sysemof,nainal policy tens, sengteig trck act<e sho, t bpbeeiain Sae ow nnd as me hod, Urter speclicai

15、 b.* s fianca mang et to pejec t ue until .sem, a"一 -k re ugi iin, ad meaure ad asesmewi cont lue t o mprove t he comla nys ite I a untol *, and sedy m”<ement i ,abi，to mannge ad untr, optmie busie - proe t ensue e、onniiit - ipa； to f ute se ngte n iner na untol s piy a cont01Pos i nne | ede

16、nt o<easgt role of e inump,iI g wih t hidpay resons I ly t a uivy mae use of ierna a Lil tols d u poentii manaement, stramine, sadadie re tansacions, stegheni ng opeains i a ucria nce wtlaw Deee nig tl e iformat onma nagmet t e nnue Ui commuicai on "zeo e-tane".o unstaty I eeu ad "

17、，-， ad PI, and MS, and，M,ifmaion systm I>se d unsr -in, Ui i ntgrainifrmain systm, ”e<ed ifmain rrsouues saed to-pand Poral .sem a dta I d depth, pin infmain sy sem onetep-e of Assuapa ciy adle_i Humanstc uae toesue "e i ."Tsengte nig Humanie s cae uninuus t fserumpay wind c r a nd g

18、a s ae, ad hhar Shun of culue osphee .aegte nig l- heie d tapppd, uae dlkul - pioees uarid I ut sye aUiviie, r U -piy- s ie segte ning hhalta nd , orgaiztonua ee hel h midica, untol caee . a nstconiuus toim p etainppy Uologi cal rnig pr evetonsstm, taii ng empl oyes heat of chaa cte, a nd stae of mo

19、od ad e,r p-igof ai - ece d f-ndy fateniy of Hmaitis envronmet T o segten _k ma nagmet enue ta te busnnssof "zeo -«，o steg heed bus ne-plas mange n wl busnnss bbsi ne-plas co -toai leve, enue te busies can contol i untoi t o clooe conue n Inaci andu, elecrc ikge a nd eegysvigluhe - igreort

20、 and untrl ffe dba - of U osed ig managment, mpr<e preveti on uapa ciyTo futhe sada d tad ng, and srve to au-e "uur dig to a wsa ndadad ffi." .no<ain of pefrmance manaement, tennue tha potetal - ployes "ze of，. To streg he pelormane mang-ent, proces untri e nhanue empiyee auatin

21、 and es of efecie commuicai on to mpr o<e pefmaI ue ma nng-et Turher Lua ntiy and eie empioee stadads . Wk, ui piy pary and bra nch, ad m - bes i Ive type EEterprie" unstrut on i nthe of ue re , and ,ht ng fortrss rol e and pionee mode rle； to conti nues to sregheni ng fu good" ledesiun

22、suUin內容阿基米德原理 J 公式L影響浮力大小的因素輪船浮力的應用- 潛水艇I熱氣球L流體 流體壓強與流速的關系J升力、問題一：比較浮力的大小1 .如圖所示，將一只玩具青蛙放入水中，它能漂浮于水面；把它放入另一種液體中，它卻沉入底部。則在這兩種情況下這只玩具青蛙受到的浮力大小相比較（A.在水中受到的浮力較大B.在液體中受到的浮力較大C.受到的浮力一樣大D.無法比較浮力大?。ń馕觯河深}知：液體密度不同，由圖可知：排開液體的體積不同，符合上述條件；又由于是同一只玩具重一定，根據物體的沉浮條件有：在水中5水=6在液體中：F液G,比較得:F水F液，故選A=2 .體積相同的三個球 A、B、C,在水中

23、靜止時的位置如圖所示,由圖可知（）A、球A受到的浮力最大B、千B受到的浮力最大C、球C受到的浮力最大D三個球受到的浮力一樣大（解析：由題知液體密度相同，排開液體的體積不同，根據阿基米德原理的公式F浮=PgV排，C球受浮力最大，故選C）歸納、總結：比較浮力的大小的方法：（1）用物體的沉浮條件（2）阿基米德原理問題二：計算浮力的大?。? .一物體用細線掛在彈簧秤上，彈簧秤的示數是 4.5牛，當把物體浸沒在水中時，彈簧秤的sat roe Jo pefct daily ru mantea nce opeain of ec ods prmote lrbl_ easns aays s and , m ha

24、dfr t I stregt heni ng US, and Em, a d S CM, te ap.atonof taii ng, impr ove -pl oyes a matin systmof,nainal policy teds, se ngteing trck acl'e shoud； t impleeI aton Sae ow nnd ases me hod, "ter specificai buS .-s fianca mang -et to pelec r t ube cntrl .sem, ac'evld Isk re cg"in, ad

25、 meaure ad asesment adwl conti ，ue "improve the com” nys ite - control ssem, and seady mprovement i-bl, toman.e ad until, optmle busie prce sses t ensue ceases eaponUi .es i pace； to f ule Se ngte n iner nal controls pay a control pos i nde | edent ovesgt role of e - uatincmp”I g -h t hidpay re

26、sonS I ly t a civey m use of ier nal a uil tos d c poenta management, st., sa.ze re . tansacions, stegheni ng opeains i a ria nce Wllaw Dee nigtl e iformat onma nagmet to e nsue ul commuiai on "zeo e SStace".o unsbaly .eec ERP ad ",+、. P, a nd MS, and SCM.fomai on sysem .ased ccnSr uc

27、.n, ul i n、rn iforma.n sysem, acheved "main resouces Saed topan. Portal system a aI d depth, pay i nfomain sy sonee, of Ass pac adle_l Humanstc cae toesue "e i ."Tsengte nig Humanie s cae cninuus t .r cmpay wi ndc ,a nd ga s ae, ad hhar Shun of culue amosphee .aegte nig l- hele d tapp

28、pd, cae dlkul - ploees carid I ut sye acHiis rchmplyles * segte ning hhalta nd , orgaiztonca ee hel h midica, cnt ol caee .a nst coniuus to im p eainp. colgi cal rnig pr evein sstm, taiing empl oyes heat of chaa cte, a nd stae of mood ad e，r p-igof . , ce d S ndly faten of atis envronmet T o segten

29、-. ma nagmet enureta te bbsie- of "zeo -« To steg heed bus ne-plas mang-e n Wlbusieis busine-plas co -to leve, enue te bbsie- can contol i cntol t o clooe conce nfnacal a nd -，e lecrc ikge a ndeegysvig icle - igreort and cntrl ffedba ck of c osed ig managme nt .p.1，. preveti on capa ciyTo

30、fute sada die tad ng, and srve t acine "ccr dig to a w, sanndalie ad fai." .no<ain of pefrmance maaement, t ennue ta pote-l - ployes "zeof，. Tosteg he pelormaie mang-ent proces cntrl e nhance emply ee auat in a nd eve s of fecie cmmuiatontmpr o<e pefma ma nng-etTurher Luaniy and

31、 eie emploee stadads. Wk, ul ply pary and bra nch, ad m - bes i Ive ype EEerprie" cnstuct on i nte of ce re , and ,ht ng fortrss rol e and pionee mode rl e； to contnues tostegheni ng fu good" ledesicnsucin啟發(fā)學生分析：物重為4.5N,利用重力和浸入水中時彈簧測力計的示數計算浮力F浮=6物-F=3N2 .密度為0.9 X103kg/m3質量為8.1千克石蠟，放入足量水中，石

32、蠟受到的浮力多大？（解析：因為物體的密度為0.9 X103kg/m3（水的密度：1.0 x 103kg/m3,物體漂浮或懸浮時利 用浮沉條件計算浮力 F浮=G物=mg=81N3 .輪船問題：一艘輪船（重力不變）從長江駛入大海，他受到的浮力 ,船會。（解析：船是漂浮物體，5浮=6重力不變故浮力不變根據阿基米德原理：F浮二p液gV排浮力不變，液體密度與物體排開液體的體積成反比由于海水的密度大于河水的密度，所以船在海水中浸入的體積小于在河水中浸入的體積，故船會浮上來一些）密度計問題：在一支鉛筆的下端粘上一塊橡皮泥，將它分別置于甲、乙兩杯液體中觀察到靜止時的情形如圖所示力，甲杯液體的密度 分析同上。三

33、、歸納總結：浮力的計算方法:,鉛筆在岫如次小受到的浮力 小數差法二F =QF乙杯液體的密度QY黃'浮-船岸排:m一平衡力法二,學二G鉛筆在乙杯液體中受到的浮四、鞏固拓展:1 .利用舊牙膏皮可以做很多小實驗， 一位同學吧空的牙膏皮剪去尾巴做成筒狀，放入盛有水燃油的臉盆中，發(fā)現牙膏皮漂浮在水面上；然后再將此牙 膏皮卷成小團狀后放入水中，牙膏皮沉入水底，比較 前后兩種情況，下列說法中正確的是-（A ）z£l:鹽水A.牙膏皮漂浮時受到的浮力比它沉底時收到的浮力大B.牙膏皮漂浮時受到的重力比它沉底時收到的重力小C.牙膏皮沉底時受到的浮力等于它的重力D.牙膏皮沉底時排開水的體積與它漂浮時

34、排開水的體積相等2 .將同一物體放在液體中的三種情況如圖所示，其中物體受到浮力最小的是 （c ）A.圖甲 B. 圖乙 C. 圖內 D. 無法比較3 .在遠洋輪船的船舷上，都漆著五條“吃水線"，又稱"載重線"，如圖八亙空心下llel c ei seeit akak euSfgtfg e s o.k - at e lyi c aee- c etivieedisgitk elt. 1g et is s s -e -c'eeteii tlyfitgt ，.ti vvm lga syeWes s gte aty gee esis a i t 一 . e is a a

35、laat afse agee cis-set uyu.ly csig i - rtg tgev g i saad g v deEly s a i l ala ee i . l ir gtii a caye tii ssat roe 。perfect daly ru m_ena nce opeain of ecds,promote “biemeasns aaysi s and，m ha-ve. t i stegt heni ng "，+, and ERP , a. S CM, e gy apkaton of traiing, mprove employees a main sysemo

36、f,nainal policy tens, sengteig trck act<e sho, t bpbeeiain Sae ow nnd as me hod, Urter speclicai b.* s fianca mang et to pejec t ue until .sem, a"一 -k re ugi iin, ad meaure ad asesmewi cont lue t o mprove t he comla nys ite I a untol *, and sedy m”<ement i ,abi，to mannge ad untr, optmie b

37、usie - proe t ensue e、onniiit - ipa； to f ute se ngte n iner na untol s piy a cont01Pos i nne | edent o<easgt role of e inump,iI g wih t hidpay resons I ly t a uivy mae use of ierna a Lil tols d u poentii manaement, stramine, sadadie re tansacions, stegheni ng opeains i a ucria nce wtlaw Deee nig

38、 tl e iformat onma nagmet t e nnue Ui commuicai on "zeo e-tane".o unstaty I eeu ad "，-， ad PI, and MS, and，M,ifmaion systm I>se d unsr -in, Ui i ntgrainifrmain systm, ”e<ed ifmain rrsouues saed to-pand Poral .sem a dta I d depth, pin infmain sy sem onetep-e of Assuapa ciy adle_i

39、 Humanstc uae toesue "e i ."Tsengte nig Humanie s cae uninuus t fserumpay wind c r a nd ga s ae, ad hhar Shun of culue osphee .aegte nig l- heie d tapppd, uae dlkul - pioees uarid I ut sye aUiviie, r U -piy- s ie segte ning hhalta nd , orgaiztonua ee hel h midica, untol caee . a nstconiuus

40、 toim p etainppy Uologi cal rnig pr evetonsstm, taii ng empl oyes heat of chaa cte, a nd stae of mood ad e,r p-igof ai - ece d f-ndy fateniy of Hmaitis envronmet T o segten _k ma nagmet enue ta te busnnssof "zeo -«，o steg heed bus ne-plas mange n wl busnnss bbsi ne-plas co -toai leve, enue

41、 te busies can contol i untoi t o clooe conue n Inaci andu, elecrc ikge a nd eegysvigluhe - igreort and untrl ffe dba - of U osed ig managment, mpr<e preveti on uapa ciyTo futhe sada d tad ng, and srve to au-e "uur dig to a wsa ndadad ffi." .no<ain of pefrmance manaement, tennue tha

42、potetal - ployes "ze of，. To streg he pelormane mang-ent, proces untri e nhanue empiyee auatin and es of efecie commuicai on to mpr o<e pefmaI ue ma nng-et Turher Lua ntiy and eie empioee stadads . Wk, ui piy pary and bra nch, ad m - bes i Ive type EEterprie" unstrut on i nthe of ue re

43、, and ,ht ng fortrss rol e and pionee mode rle； to conti nues to sregheni ng fu good" ledesiunsuUin2所示.其中標有 W勺是北大西洋載重線，標有S的是印度洋載重線.當船從北大西洋駛向印度 洋時，輪船受到的浮力以及北大西洋與印度洋的海水密度p 1和p 2的關系，有（A ）A.浮力增大，p 1 = p 2 B.浮力減小，p 1= p 2C.浮力不變，p1>p2 D.浮力不變，p1<p 2問題三：浮力與密度1.用彈簧測力計在空氣中稱得某合金塊重力為2N,把合金塊浸沒在水中時彈簧測力

44、計的讀數為1N1求：（1）此合金塊的密度是多少？（解析：解題思路：V =- S.5浮=G-F拉F浮=P'/gV排、& 珠總、P = V等公式進行計算。）2.某科學興趣小組的同學學習了浮力知識后，想測量一些生活中常見的物體的密度。小組同 學現有器材：量筒、試管、小鐵球（可放入試管中）、果汁、燒杯和水。請你在試管、小鐵 球和果汁任選一個測量其密度。（1）寫出實驗方案：（可畫圖配合文字說一7明）二：ESO r （2）所測密度的表達式：自立" -解析：（1）測量過程如圖：（2）表達式：-'%-%p二儀 VI p鞏固拓展1 .在課外小組活動中，小剛將一掛在彈簧測力計下的

45、形狀不規(guī)則的石塊分別浸沒在水中，彈簧測力計的示數如圖所示，石塊在水中所受的浮力為N；該物體將 （填“上浮”、“懸浮”或“下沉”）;石塊的密度2 .某科學興趣小組的同學學習了浮力知識后，想測量一些生活中常見的物體的密度。小組 同學現有器材：量筒、牙膏皮（可放入試管中）、燒杯和水。請你測量牙膏皮的密度。（1）。出實驗方案:（I -3圈配介文字說叨）ii c ee seveit akak eusfgtfg e s -nia -iyi 0nevefu etivideedisgit- iteg 1g et is s s ke ikfufet.ii tly 1rtgt 一- nuti vvni iga s

46、yteW-s st gt. aet gee esis n i t d.i ii n viaat n-sfe ngee uisc set uyuuiyu it csig itgrtg tgev g e snnd g v dveEly 0a i i ain ee e 24tBi i i_tr gtii a cayee tis twgffntit. inree geaiintnsyteaigReciiga n ecsaig niasi i. i i e F reveiis 4sat roe Jo pefct daily ru mantea nce opeain of ec ods prmote lr

47、bl_ easns aays s and , m hadfr t I stregt heni ng US, and Em, a d S CM, te ap.atonof taii ng, impr ove -pl oyes a matin systmof,nainal policy teds, se ngteing trck acl'e shoud； t impleeI aton Sae ow nnd ases me hod, "ter specificai buS .-s fianca mang -et to pelec r t ube cntrl .sem, ac'

48、;evld Isk re cg"in, ad meaure ad asesment adwl conti ，ue "improve the com” nys ite - control ssem, and seady mprovement i-bl, toman.e ad until, optmle busie prce sses t ensue ceases eaponUi .es i pace； to f ule Se ngte n iner nal controls pay a control pos i nde | edent ovesgt role of e -

49、uatincmp”I g -h t hidpay resonS I ly t a civey m use of ier nal a uil tos d c poenta management, st., sa.ze re . tansacions, stegheni ng opeains i a ria nce Wllaw Dee nigtl e iformat onma nagmet to e nsue ul commuiai on "zeo e SStace".o unsbaly .eec ERP ad ",+、. P, a nd MS, and SCM.fo

50、mai on sysem .ased ccnSr uc.n, ul i n、rn iforma.n sysem, acheved "main resouces Saed topan. Portal system a aI d depth, pay i nfomain sy sonee, of Ass pac adle_l Humanstc cae toesue "e i ."Tsengte nig Humanie s cae cninuus t .r cmpay wi ndc ,a nd ga s ae, ad hhar Shun of culue amosphee .aegte nig l- hele d tapppd,