中考物理压轴题压力压强压轴题

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17ᦑnᫀIJ6஺12.᝞rᡠs-ᙊwxᘤᵬ'Pᙠ|â☢~-ãäḄ>☢uᑖI200cm2100cm2.ᘤᵬᨵ0.2mḄ-ᘤ'ᨵ0.3mḄ⏀஺.(ᘤᑖå9!ᙳImḄ⏀3-ᒕç=ᘤᵬ>?Ḅ@AIp,ᒕç⏀=ᘤ'>?Ḅ@AIP⏀.Â!mḄéI0.8kg?Ḅ@#ó<ôḄÁ-õp>p⏀-ᵫ÷øp=E■¿ûJS.Þ]ᐗᔣ⏀-!!^,.---------->------------,SS⏀þᐭᦪ
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19জmঞmohᡂqrঞmটmohtᡂqruvᱥxKyz{ᡈKyᐰ~টmডAmoAhᡂqr஺টmঠbT3Ḅlmটmঠ=PSAAhটmঠ0ᘤḄ5☢MSA=mঠ=———=400cm2,টmঠlg/cmX4cmজb3Ḅ:mi=pVi=p(SA-SB)hi,ᙊ*Ḅ5☢MSB=SA--^^—=400cm2-——=150cm2,PElg/cm3X4cin,/ᙊ*ḄXhB=-^-=2800cm3~18.7cm>h4=16cm,SB150cm2,ঞᑮটḄbᙊ*Kyz{tᐰᙠ3bᵫটL,m4=pSAh4-V᣸,...ᙊ*᣸3ḄM430V᣸=SAh4-^!l=400cm2x16cm-.9.§_=2100cm3=2.1x103m\Plg/cin3ᙊ*ḄYG=F=pgV^=1x103kg/m3x]0N/kgx2.1x10-3m3=21N,ᙊ*ᙠᙊ*/0ᘤAḄ345☢7V80ᘤ5Ḅ9YF=G=21N,ᙊ*B80ᘤA5☢Ḅ9:po=-^—==1400Pao0.015in2

20ᦑ$ᫀ&1400஺.R$⚪(ᐳ4⚪)14.“¡”⁚¤¥¦d§ᑮᡃ©ª«¬T®“¯°±²ᜮ´²ᜮµ¶”Ḅ·¸¹º஺¹ºb»yᔊ®½¾ᙠ¿ÀHḄ¦d§§Á¦ÂᰦÄḄÅᦑ¤ᑖ᪆ÆÇÈÉḄÊᙠMtËVÊ9:oÌXᨵᐵ஺᪷ÇȤЮ᝞ᡠJḄ¯ÑÒÓÔÕḄÖ×Øᙠ9:Ù7ᵨ9:ÙbḄ3Û*ᙠÔÕbÜÉḄÊ஺(ÔÕ¾ᐭ3bÝ3ÞbḄ3Tß3Ì7ᓣ஺á◞ãVäåVᵨÌXÙC9:Ùæ3ḄÌXç(ᓽ&ÕbÜÊḄÌXç)fÜÊéVḄ9:ç஺ᙠáêæVëì9:Ùíî3Û☢ïᢝᙠbAñḄòótËᔜêæÒÓᦪ@A᝞Hᐸ»ḄÌX20304050(࠷)ÊḄ9:l.OxlO51.03X1051.O5X1O5l.lOxlO5(Pa)(1)᪷¤7öÒÓLáêæVë9:Ùíî3Û☢ïᢝᙠbAñḄòótËᐸ÷ḄïᢝÉÜÊḄMtË஺(2)ᑖ᪆7⊤bÒÓᦪLÉḄÊᙠMïᢝtËV,ÊḄ9:øÌXḄᓣùᜧ஺(3)ᙠûßḄüᜩþÿᙠᚁ⌕⌕Ḅᓄᔾᑁ!Ḅ"#$%ᩭ'(ᑁ!Ḅ)*,,-(1).ᵨ0ᑴ23456789:;<3=)*>?@AB☢DᢝᙠFGAHḄIJ2KḄDᢝLMN3OP!Ḅ!Q289!Ḅ)*R"#ḄᐵTU

21(2)ᑖ᪆67ᦪ]^_LM3Ḅ!ᙠ!QDᢝ2!Ḅ)*`"#ḄᓣbcdᜧU(3)ᙠgḄhᜩjkᙠᚁRᙢ☢mn᥅pqr"#ᓣb!QLMḄᩩt)*dᜧU⌕Ḅᓄᔾᑁ!Ḅ"#$%ᩭ'(ᑁ!Ḅ)*■vᰦ஺ᦑzᫀ|-(1)!QU(2)!QU"#ḄᓣbcdᜧU(3)"#$%஺15.᝞FᡠUCᜐ▀ᐵP?ᙳAஹBᜐ☢Ḅb#ᑖhlh2(hl>h2),ᙠᡭ▀ḄᑮḄ-¡?¢ᔣ¤¥ᙠCᜐᨵL§¨ḄↈBᱏ«ↈBᱏḄ☢Q|s,U?ↈBᱏḄ)®|F1,ↈBᱏḄ)®|F2(᝞F)°±²-FI>F2O,-³|hi>h2,ᵫB!)*p=pBgh,^¹pghi>pgh2,ᡠº(Bᱏ?Ḅ)*P1>P2,ᵫp=S½-B!)®F=pS,c¾L¿(Bᱏ?☢QÀÁᡠº(Bᱏ?ᡠÂḄ)®Fi>F2O16.᝞FᡠᙠẆ9Å®᝞ÆÇÈḄÉ⚪¤¥ᨵL¿☢Q|S,b|hḄËÌ!ᱥᙽÏÐᙠGᵫÑËÌ!⊤☢Ḅ)®FiÓ⊤☢Ḅ)®F2¾¡cÇÈÔᱥᙽḄÅ®஺FGËÌ!ᱥᙽ☢QS=50cm2,hi=

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