浮力复习课教学设计

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浮力复习课教学设计付敬范一、教学目标：1 .知识与技能：知道浮力

9、的集中计算方法，理解阿基米德原理，知道物体的沉浮条件，知道 浮力的应用，会制作密度计。2 .过程与方法：经历探索浮力大小过程；日常生活现象入手，培养学生分析概括能力、解决 问题能力与动手操作能力。3 .培养学生乐于探索生活中物理知识的兴趣；培养学生大胆猜想，在实验过程中勇于创新精神。教学重点：阿基米德原理、物体的沉浮条件,/我的体枳（大，受到）的浮力大教学难点：运用阿基米德原理和物体的沉浮条件解决实/我潜得深，受到的浮力大"-f一丁-际问题。教学方法：校教学模式学 法：科学探究教学手段：多媒体教学流程：激情引趣：我是一条来自深海的鱼，一天，来了一个小伙伴在我们的对话中（如图）谁是对的

10、？自主合作学习：一、总结构建本章的知识结构r定义产生原因物体的浮沉条件浮力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内容阿基米德原理 J 公式L影响浮力大小的因素轮船浮力的应用- 潜水艇I热气球L流体 流体压强与流速的关系J升力、问题一：比较浮力的大小1 .如图所示，将一只玩具青蛙放入水中，它能漂浮于水面；把它放入另一种液体中，它却沉入底部。则在这两种情况下这只玩具青蛙受到的浮力大小相比较（A.在水中受到的浮力较大B.在液体中受到的浮力较大C.受到的浮力一样大D.无法比较浮力大小（解析：由题知：液体密度不同，由图可知：排开液体的体积不同，符合上述条件；又由于是同一只玩具重一定，根据物体的沉浮条件有：在水中5水=6在液体中：F液G,比较得:F水F液，故选A=2 .体积相同的三个球 A、B、C,在水中

23、静止时的位置如图所示,由图可知（）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三个球受到的浮力一样大（解析：由题知液体密度相同，排开液体的体积不同，根据阿基米德原理的公式F浮=PgV排，C球受浮力最大，故选C）归纳、总结：比较浮力的大小的方法：（1）用物体的沉浮条件（2）阿基米德原理问题二：计算浮力的大小：1 .一物体用细线挂在弹簧秤上，弹簧秤的示数是 4.5牛，当把物体浸没在水中时，弹簧秤的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启发学生分析：物重为4.5N,利用重力和浸入水中时弹簧测力计的示数计算浮力F浮=6物-F=3N2 .密度为0.9 X103kg/m3质量为8.1千克石蜡，放入足量水中，石

32、蜡受到的浮力多大？（解析：因为物体的密度为0.9 X103kg/m3（水的密度：1.0 x 103kg/m3,物体漂浮或悬浮时利 用浮沉条件计算浮力 F浮=G物=mg=81N3 .轮船问题：一艘轮船（重力不变）从长江驶入大海，他受到的浮力 ,船会。（解析：船是漂浮物体，5浮=6重力不变故浮力不变根据阿基米德原理：F浮二p液gV排浮力不变，液体密度与物体排开液体的体积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体积小于在河水中浸入的体积，故船会浮上来一些）密度计问题：在一支铅笔的下端粘上一块橡皮泥，将它分别置于甲、乙两杯液体中观察到静止时的情形如图所示力，甲杯液体的密度 分析同上。三

33、、归纳总结：浮力的计算方法:,铅笔在岫如次小受到的浮力 小数差法二F =QF乙杯液体的密度QY黄'浮-船岸排:m一平衡力法二,学二G铅笔在乙杯液体中受到的浮四、巩固拓展:1 .利用旧牙膏皮可以做很多小实验， 一位同学吧空的牙膏皮剪去尾巴做成筒状，放入盛有水燃油的脸盆中，发现牙膏皮漂浮在水面上；然后再将此牙 膏皮卷成小团状后放入水中，牙膏皮沉入水底，比较 前后两种情况，下列说法中正确的是-（A ）z£l:盐水A.牙膏皮漂浮时受到的浮力比它沉底时收到的浮力大B.牙膏皮漂浮时受到的重力比它沉底时收到的重力小C.牙膏皮沉底时受到的浮力等于它的重力D.牙膏皮沉底时排开水的体积与它漂浮时

34、排开水的体积相等2 .将同一物体放在液体中的三种情况如图所示，其中物体受到浮力最小的是 （c ）A.图甲 B. 图乙 C. 图内 D. 无法比较3 .在远洋轮船的船舷上，都漆着五条“吃水线"，又称"载重线"，如图八亘空心下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.其中标有 W勺是北大西洋载重线，标有S的是印度洋载重线.当船从北大西洋驶向印度 洋时，轮船受到的浮力以及北大西洋与印度洋的海水密度p 1和p 2的关系，有（A ）A.浮力增大，p 1 = p 2 B.浮力减小，p 1= p 2C.浮力不变，p1>p2 D.浮力不变，p1<p 2问题三：浮力与密度1.用弹簧测力计在空气中称得某合金块重力为2N,把合金块浸没在水中时弹簧测力

44、计的读数为1N1求：（1）此合金块的密度是多少？（解析：解题思路：V =- S.5浮=G-F拉F浮=P'/gV排、& 珠总、P = V等公式进行计算。）2.某科学兴趣小组的同学学习了浮力知识后，想测量一些生活中常见的物体的密度。小组同 学现有器材：量筒、试管、小铁球（可放入试管中）、果汁、烧杯和水。请你在试管、小铁 球和果汁任选一个测量其密度。（1）写出实验方案：（可画图配合文字说一7明）二：ESO r （2）所测密度的表达式：自立" -解析：（1）测量过程如图：（2）表达式：-'%-%p二仪 VI p巩固拓展1 .在课外小组活动中，小刚将一挂在弹簧测力计下的

45、形状不规则的石块分别浸没在水中，弹簧测力计的示数如图所示，石块在水中所受的浮力为N；该物体将 （填“上浮”、“悬浮”或“下沉”）;石块的密度2 .某科学兴趣小组的同学学习了浮力知识后，想测量一些生活中常见的物体的密度。小组 同学现有器材：量筒、牙膏皮（可放入试管中）、烧杯和水。请你测量牙膏皮的密度。（1）。出实验方案:（I -3圈配介文字说叨）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,