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16Jdឤfg{¾mvQ—2mvp—0,ᵫijkdឤfg{¾mgh=+^-2mvp2,1QP_ḄJk¾Ek2=<=>?:ᦑC.&ᡠ($¬ÂᙳÄஹᙳMஹᑁ⊤☢ᐝḄÆÇᐰabḄ;ᙊÉ/h8¯ᙠᐝḄ!☢#$&ÌaஹcᑖÏ48ÉḄᨬ5^,bஹb'ᑖÏ$ஹ8ÉḄᨬÑ^$/ÉḄ;<Ò☠Ḽ»¼ᜋÖ$)Æ$ḄᳫᙊÉ/⚔<Ḅ^Ø./®¯.=>?./g,Ù:(1)ᳫCa^IJᑮb^_Ḅ./ᜧÛAÉTᙢ☢ḄÚ>ᜧ;(2)ᳫᙠ8ÉᑁIJᡠk3ᑮḄᨬᜧ5/;(3)8Ḅᨬᜧ./Ḅᜧ.ூÞᫀ(1áῖ3mg+Mg(2ãäq2m/---C3D^^ூz᪆(1)ᳫC^IJᑮb^ḄRS$ijkdឤ$ᨵ?gH=q”70()2z{ᳫᑮb^_Ḅ./ᜧ0o=2ᙠᨬÑ^ᓃ$᪷íîïðñfgò{ó|—mg="?£"z{ó=3"ᔞᵫîïðúfgòû$ᳫT/ḄÚ>A'=FN=3?g,/☟ $ᜐ !⊝þ ᵫ⊝ᩩ ᙢ☢4Ḅᢝ='-\-Mg=3mg-\-Mg,ᵫ Nᙢ☢Ḅ=F=3mg+Mg.(2)8ஹC"ᡂḄ$%ᙠ'(ᔣ*+,ឤ .ᔣ/01(ᔣ 2ᳫᙠ85ᑁ7*8ᡠ:;ᑮḄᨬᜧ?@hᜐB CὅᐳF ᵫ*+,ឤmvo—(M+m)vᵫGH:,ឤ ᨵJK0()2=3(N+ᵨ)02+37
17MRTU/?=(3)X2ᳫYᑮ85ḄZ[b']B 8ḄF@ᨬᜧ ᪷_*+,ឤ ᨵK`=mv\+MV2ᵫ:+,ឤJ2()2=%b2+JK022TU2=cdeM+mvᓃ“ᱥijᱥi”1lmn1.lq⍳,Ḅs(1)*+,ឤ ᓽpi+p2=pi'+p2'(2)*:wxK ᓽEki+Ek2 Eki'+Ek2'ᡈEᓝG2H+I~'7Lm\ZmiLm\Zmi(3)F@⌕zᔠ|}~lCᱥiᔣ7* ᑣ☢ᱥiḄF@ᜧ☢ᱥiḄF@ ᓽ ᔲᑣlqlq ᩭᙠ☢ḄᱥiḄF@xᜧ ᩭᙠ☢ḄᱥiḄF@ᜧᡈᩭᙠ☢ḄᱥiḄF@,ᓽᔲᑣlqᨵlCᱥiᔣ7* ᑣlCᱥiḄ7*(ᔣw:wᦋ ◀CᱥilqF@ᙳ02.lqmnn(1)ឋlqCᳫ¢£ឋlqB¤¥¦*+,ឤ§GH:,ឤ.¨+0ஹF@0V1Ḅ2ᳫj¨+0mḄ☟ª2ᳫ¢£1☢ឋlq20« ᨵm\v\~mw\'-\-mrv2¬1=¬®I+5M202²³K1—m2¶⁐2ᑐ2101TUV\t=V2=m\+K2m\+K2°º~জXCᳫ¨+B 6'=1 Cᳫlq½ᣚ¿F@ঝX¨+ᜧḄᳫl¨+2ḄᳫB S'>0,Ã>0,lqCᳫÄF@SḄ
18(ᔣ7*ঞX¨+2Ḅᳫl¨+ᜧḄᳫB 02'>0,lq¨+2ḄᳫÆÇYটqF@jqF@ᜧ2 2ÉᐰឋlqজqᐳFঝᨵ*:Ëᜫ ËᜫᨬÍ«⚪3.ᵬஹÐCÑᱥᙽᙠᐝÔ'Õ☢ÖÄ×Ø7* ᵬÙÖÐ ÚjТ£lq lqᵬஹÐḄF@ÛBÜḄᓄÞßØᡠàáᵬḄ¨+01kg,ᑣlqâãßCᱥᙽËᜫḄGH:0³¶C.5JD.6JூåᫀAூT᪆éÐᱥᙽḄ¨+0mᵫ*+,ឤᨵêᵬ0ᵬ+Kᓃᓃ=KᵬᵬìᐭÞßᦪ_TUK=6kg,ïðUlqâãßCᱥᙽËᜫḄGH:0EM=5ißñ+/vVᓫeV—ìᐭÞßᦪ_TUEó=3J,A1ôÞᡠà ᐝÔ'☢Öᨵ/ஹ8Cᱥᙽ á/ᱥᙽḄ¨+m=2kg,.ḄõF@ᔣ/7* j☟ªḄᱥᙽ8¢£lqÚö7*,AlqḄ÷øBÜÞùÞᡠà³sᔣ/01(ᔣ¶ ᑣlqḄF@úᱥi8Ḅ¨+ᑖü0³¶«/sA.2m/s,5kgB.2m/s»3kgC.3.5m/s,2.86kgD.3.5m/s,0.86kgூåᫀB
19ூT᪆20ᵫÞù lAḄF@s=5m/s,lABḄᐳF@V2=28—20.m/s=2m/s,A,8lqâãß*+,ឤ .ᔣ/01(ᔣ ᵫ*+,ឤoo—4U7b=(m+K8)2 TUm8=3kg,Bᡠᙠ☢ᱥᙽ4ஹ ☢ᒨ8,ᐸZ"CḄ%&'(ᙳ*m, ☢ᒨBḄ%&M=3m, ☢ᒨBḄ ☢+,"☢'ᑗ.ᒨ/01ᔜ34☢ᙳᐝ678ᱥᙽC9:oᔣ=>?"/ABCDCDEFGᱥᙽHᙠIJ6 ☢ᒨKLM%/B1)CDPQRSTᜫḄVWX;(2)CEᱥᙽ/"ᙠ ☢ᒨ8X0\ᑮḄᨬᜧ1:ூaᫀ( dফfூg᪆(1)ᱥᙽC"ᱥᙽ4ABCDHᙠIJᑁḄjᔣ*jᔣᵫ?&lឤnopMmvo=2mvgp0=soosCDPQRSTᜫḄVWX:Eist—^nvi—^X.2mv2gpEv=5iy(2)zᱥᙽ4ஹCᓣᑮᨬᜧ1:|/ஹBஹRSḄ9:'(᪷~?&lឤnoMmvo=(»7++3w)vigpUl=1vo᪷~VWXlឤp2mgh=sXsX
203gp=QGট“6ᙽ—ᩈ”CDஹ,,,,,,L ,,' . MQI.ᙢ☢ᐝ6ᙢ☢ᐝ6(1)ᩈᙽᡈ6ᙽᩈ6+zFὅ9:'(|ᩈᙽᡈᩈḄ9:ᨬᜧFὅḄ'¢£¤(*ᐭᩈᙽḄ¦:)§p©(ªᱯᐰ¬ឋCD®¯)(2)RSḄ?&lឤ°VWX±lឤ᥅³´"Fὅ'¢£¤Ḅµ¶(·RS¸¹ḄVWX(3)᪷~X&lឤRSTᜫḄ?XA£k—Vs/Eko,º»¼(ᡈ6ᙽ)Ḅ%&½ᩈᙽ(ᡈᩈ)Ḅ%&½ᜧ?XTᜫ½¾(4)¿ÀÁ⚪ú?&ஹX&Ä:Lg'z·¬ឋCD®¯Åº´Æ>?ḄÄ:ÇÈLgÉ⚪4.ᡠ%&ᵨ=1.0kgḄᩈ☟Ìᙠᐝ6☢%&Í=0.495kgḄᱥᙽ(ºÎ*%)ᙠᩈḄÏ,ᱥᙽ"ᩈÐḄ?᥅³Ñᦪ“=0.4%&mo=0.005kgḄ9:a=300m/sÓjᔣᐭᱥᙽÔᶇᙠᐸ("ᱥᙽÖᵨ|Ð×)ᩈ/0Øg§10m/s2LMVoJTLÙpnM_ஹ.AL-“““᧕-■পᱥᙽḄᨬᜧ9:v\s(2)ᩈḄᨬᜧ9:V2(3)ᱥᙽᙠᩈ6?Ḅ|Ðtூaᫀ(1)3m/s(2)1m/s(3)0.5sூg᪆(1)ᐭᱥᙽEIJᔣ=6ÞḄß9:ᓽ*ᱥᙽḄᨬᜧ9:§ᔣ=*jᔣ᪷~ÆᱥᙽáᡂḄRS?&lឤpM"?000=(+0)1gp01=3m/so(2)zஹᱥᙽÆᩈãὅ9:'ä|ᩈḄ9:ᨬᜧ᪷~ãὅáᡂḄ
21RS?&lឤpM("1+mo)V]=(æ'+m+mo)V2gpMs=1m/so(3)¢ᩈ᪷~?&nᳮpM"(Í+"?()ì/=Ḅ2—0gpM/=0.5Soᡠ%&m=\kgḄᱥᙽ☟ÌᙠïnðḄᨬÏ,%&=2kgḄñÏ,ò☠ð☟ᙠᐝ6ᙢ☢ðஹñḄØ:ᙳ*0.6m.⊤☢(1.7¢ᱥᙽöÍIᔣ=Ḅឤ´F,÷ᱥᙽøù>?zᱥᙽᑮ\ðᨬ=,|úûឤ´üᱥᙽýþX0ᑮ\ñḄ=,.ᱥᙽᜧ±ÿ ஹḄ᥅ᦪᙳ0.5,g 10m/s2,"#J-i)ᱥᙽ()*Ḅᜧ,(2).ឤE1ᱥᙽ23Ḅᜧ.ூ5ᫀ]প3m/s(2)5N-sூ᪆(1)<=>.ᔣ@Ḅឤᔆ*ᱥᙽḄᜧ0(),ᱥᙽBḄᐳDᜧ0.E=>ឤᑮᱥᙽᑮG@HIJ KᑁḄMᔣNMᔣ 1ᱥᙽBOᡂḄQR#ᵫ3Tឤ#"200=(W+)1ᵫZ3Tឤ#^/MUO2=g"+Af)12+fimglὶ^K_`abcᐭᦪef#00=3m/s(2)<.ឤE1ᱥᙽ23Ḅᜧ/ ᱥᙽᙠ_h1iḄ*ᱥᙽᙠ_h1iḄIJ 1ᱥᙽ#ᵫ3jᳮ#/—mg/="Wo—0ᵫiopq#/=£ ὶ^bcᐭᦪef#/=5N-s.tᡠv wᙳᒴḄyᩈ{☟}ᙠᐝ.☢_ ᩈ{_HLᜐᨵᱥᙽ*ᱥᙽAKEH_ᩈ{ᔣ@i
22 /ஹ8ᙳ /ஹ8CḄ᥅ᦪᙳ /ஹ8ஹCὅḄ3h g"/_ᩈ{*,A.8Ḅᜧ(2)⌕Zஹ8 "Ḅ¡Ḅᩩ£(3)¤/Ḅ00,¥4ஹ8§¨ឋ ª«4ஹ8ᙳ¬D®i⌕¯°/ஹ8ᙳ±Eᩈ{_ᣵ³ ᩈ{Ḅᨬyµ¶·¸ூ5ᫀ(l)g»(2)sW¼ZG)☠ூ¿᪆(1)1Aᨵ/.img=maAfa.A=Ng1BCᨵ/.tmg=2fnaB¿fÁ=ᔠ(2)¤/ஹ8à ᑣὅNÃGᑮᐳD ᵫ3Tឤᨵ5=3mvᐳ¥ᨵiimgL2XYZ-JÆ3/nVvX¿fv\^y[3^gLo(3)ᵫǨឋ /ஹ8«Èᣚ DÇ/h1☟}Êᔣª BËÌÍ Ã³ᩈ{* ὅGᑮᐳD ᵫ3Tឤᨵ=3mvᐳ'¥ᨵ^imgL=^mvo'2—^X3mv*/2&Vo'2ὶ^¿fLᔁ%gÐᘂÓᔠÔ)Õ1.(¶⌱)tᡠv,.ᐝ×⍝ÙBÚ¨ÛÜᯠyᙳd,`ᳫ3ᑖáஹ2,m\>m2,2Ḅâᨵãjᢱ{.ᵫtvåæ☟}çஹ2,è2hᨬé*Ḅê ᑣᙠK«ḄiIJë()
23ìA.miḄᨬµ0B.1Ḅᨬµ“"_%|C./M2Ḅᨬᜧµ011ᓝ2D.2ḄᨬᜧµᙶSᓝ22ூᫀBDூ᪆ᵫ⚪ö÷ᔠ⚪t èm2hᨬé* 2Ḅ0,ø« "?1ᙠª úÍi 2ᙠ« úi èûühᨬé* Í÷ý 2÷ý øø*"?þᨬ 2ᨬᜧ ᙠøIJëQR3Bÿ 1JDIτ—2ᙳឤ11=11'+22,19/2+/2022,1'=?12ml02=VVl,BஹD⌱⚗"#.W1+/7222.&ᐝ()☢+☟-./0⊤☢ᐝ(Ḅ3☢43☢45607ᙠ(9+Ḅ:;<ᐸ☢>Ḅ)ᙽᙳ☟-@)☢+.ABC:;D)ᙽEFG)☢3m/sḄHIᔣ3☢4KL)ᙽM(ᙢ(+3☢4ᙠ3☢4++ᓣḄᨬᜧRIST=0.3m(A:@3☢4ḄRI).VW:;X(9ḄYZ[S=30kg,)ᙽḄZ[Sm=10kg,:;X(9\]^FG_`.abcHIḄᜧ:g=10m/s2.27d^^(1)g3☢4ḄZ[(2)hijkᑨm)ᙽX3☢4ᑖopᔲr+:;sூᫀ(l)20kg(2)tᳮᵫw᪆ூ᪆(1)yzᔣ{S"|ᔣ.)ᙽᙠ3☢4++ᓣᑮᨬᜧRIB~ὅᑮᐳHIᐳHISV,3☢4ḄZ[S3.G)ᙽX3☢4ᵫM|ᔣ`[ឤ< ឤz20=(m2+3)জ^72^02=(2++m2ghঝ0o=3m/sS)ᙽKLBḄHIὶজঝᐭ⚪ᦪv=1m/s,m3=20kgঞ
24(2):;KL)ᙽpḄHISG:;X)ᙽᵫ`[ឤzᨵ"?|01+200=0টᐭᦪ01=-1m/sঠ)ᙽX3☢4ᑖopḄHIᑖS02<03,G)ᙽX3☢4ᵫ`[ឤz< ឤzᨵ"?2=202+233ডg20()2=g222+32ঢὶঞডঢᐭᦪ02=—1m/sণᵫ@)ᙽX3☢4ᑖopḄHIX:;KL)ᙽpḄHIF¤)ᙽᜐᙠ:;p|ᦑ)ᙽtr+:;.3.(§⌱)&ᡠ©Z[ᑖSM<oḄ~(ᙽᵬஹᵨ¯°±²³EឤzḄHI´ᐝ(M☢_`Xµ@">|ḄZ[S᪷Ḅ☟-(ᙽ·¸¹º»º»B¼¾.ᙠᵬஹ·º»¿¼ÀᑡÂÃĸ¹ḄÅ()0”ᵬ·.ᵬஹஹ·ḄHIᙳ¸¹ÇᓄᑖS01ஹ02ஹSʤËÌ(A/+mo)v=Mvi+moV2+nwyB.ḄHItÇᵬ<·ḄHIÇS01<02,ʤËÌÏ=01+02C.ḄHItÇᵬ<·ḄHIÑÇS'¤ËÌD.ᵬஹஹ·HIᙳ¸¹ÇᓄᵬஹḄHIÑÇSS·ḄHIÇS02,¤ËÌ(V+«7O)0=(W+/WO)01+02ூÕᫀBCூ᪆º»Ḅ¿¼(ᙽᵬ<·ØᡂḄÚÛ`[ឤ(ᙽḄHItÇE(ᙽᵬḄÜHI|ᔣS"|ᔣݺp(ᙽᵬ<·ḄHIᑖÇS0<02,ᵫ`[ឤzÞ=ß0|+à2ݺp(ᙽᵬ<·ḄHIFᵫ`[ឤzá=(M+m)v',ᦑBஹC"#.4.(§⌱)&ᡠ©Z[SMḄᬪäᱥ4☟-ᙠᐝ(ḄMᙢ☢+ᐸ3☢ᐝ(¤ÌæçXM|ᔣḄᜳéS.0êZ[S?Ḅ:ᱥᙽë3☢ìíEÜHIî´3☢ᔣ+ï\_`.ð:ᱥᙽ´3☢ᔣ+_`ᑮᨬRñBHIᜧ:Sòᙢ☢RISbcHISg,ᑣÀᑡᐵÚ"#ḄÅ()
25A.mvo=(m+M)vB.mvocosO=(m+M)vC./”(o()sinf))2=mghD.^/M^O2=mgh+/(+A/)v2ூÕᫀBDூ᪆:ᱥᙽ+ᓣᑮᨬRñB:ᱥᙽFGᬪäᱥ4☟-ᡠE:ᱥᙽXᬪäᱥ4ḄHIÑS´M|ᔣdὅØᡂḄÚÛᙠM|ᔣ+`[ឤᐰiø ឤ.EMᔣ5S"|ᔣᙠ:ᱥᙽ+ᓣiøᵫM|ᔣÚÛ`[ឤm00cos=ú?+/û0,ᦑA┯ýB"#ÚÛ ឤᵫ ឤz;úû2=/ᘊ/?+,“+"ᦑC┯D.5.⌱ᡠᐝ ᙢ☢!ᨵ/ஹ6%ᱥ'()*+m8./0123ᜐᙠ678Ḅ;<=;<=>?@┝1B<=CDᑮ67F┝1?@Gᜫᦔ./JK᳛ᔣOPQB/R!<=ST<=UVWXY<ឋ▲\ᐵ^_`SaḄPQYbcᑡefḄgro:oiY_`a_x.AᱥhijGk^IE,bᱥnijoJpqVIrJSPᑗB.4ஹ8wxḄyQ)ᨬV{ᜧ^}C.A,6wxḄyQ~ᨬV{ᜧ^ᐰD.B<=Ḅ<ឋ~ᨬᜧFA,8ḄyQ~+"}ூᫀCD6.⌱ᡠ()+Vஹᨵ+RḄᑖ2ᐝ ᙊ⍝Ḅ ᙽ☟@^ᐝ ᙢ☢!ᙊ⍝/ ☢ +ᙊ.()+᪷Ḅ ᙽ+(J ᔣOḄK\00¡!ᙊ⍝ា£~ ᑮᙊ⍝ᨬ¤¥¦M=2m,ᑣcᑡᑨ¬Ḅg
26R°[°--------aLA. ᙽ¡!⍝ḄYb ᙽ²³~W´ឤB. ᙽ¡!⍝ḄYb ᙽᨵᙊ⍝Ḅ ᙽ¶ᡂḄwxQ)´ឤC. ᙽ¡ᑮ⍝Ḅᨬ¤Fᨵᙊ⍝Ḅ ᙽK\ᨬᜧᜧ+coD. ᙽῃ¹ᙊ⍝FK\ᜧ+gooூᫀADூº᪆ ᙽ¡!⍝ḄYbwx²³~´ឤ ᙽ²³~W´ឤ⌱⚗A ᙽ¡!⍝ḄYbwx½¾¿ᔣDÀW+ÁQ)W´ឤÂwxᙠ ¿ᔣᡠDᔠÀ+ÁQ)´ឤ⌱⚗B┯ᵫ ¿ᔣQ)´ឤÅ ᙽ¡ᑮ⍝Ḅᨬ¤Fᨵᙊ⍝Ḅ ᙽK\ᜧ+ÆB ᙽÇᙊ⍝ÈÉῃ¹ᙊ⍝Fᨵᙊ⍝Ḅ ᙽK\ᨬᜧTῃ¹F ᙽÊᨵᙊ⍝Ḅ ᙽK\ᑖË+v\Ê02,ᑣᨵmvo=mv\-\-Mv2,^mv^=jnv\2121+^Mvr,ºÅ2=Ì0,0i=2Ío,ᦑC┯D.7. ⌱ᵬᡠᙠᐝ ☢!;(<=2/01ᱥ'/JK\}ᔣOPQ67<=ÏÅ<=Ḅᨬᜧ67)+x.ÐÑ<=2/Ò2()+Ḅᱥ'3 Óᡠᱥ'/J2%ḄK\ᔣO67<=ÏÅ<=Ḅᨬᜧ67)Ô+x,ᑣ—ᑄߟSAAA/wfᑄSAAAAMMᵬÓA./ᱥ'Ḅ()+3᪷3B./ᱥ'Ḅ()+2}C.<=67ᨬᜧFḄ<ឋ~+9i^D.<=67ᨬᜧMFḄ<ឋ~+7MU02ூᫀACூº᪆Ø⚪ᵬTᱥ'Ḅ()+ᵫ²³~´ឤ1ÚÅ<=67xF<ឋ~ÛÜᡃØ⚪Óᱥ'/J2%ḄK\ᔣO67<=A,8¶ᡂḄwxQ)´ឤ<=Þᑮᨬᜧ67)FA,8ÜὅK\àáᵫQ)´ឤ1Ú
27ᨵM-2vo=(M+m)v,ᵫ~)´ឤ1ÚᨵE=^M\2vo)2-^M+m)v2,ὶãºÅp13M=3m,E='^Mv^=^mv(sL,⌱⚗AஹCBஹD┯.v8.ᡠᐝ Ḅ ç☢!ᨵáᜧḄ()ᑖË+M=0.4kgஹw=0.1kgḄ%3ᳫìíᜳḼ23>67ḄᐹᨵEp=4.0J<ឋ~Ḅ;<=(<=%ᳫWà)ôᩭᜐ^☟ö8Ð÷ᯠùú<=ᳫ²ῃ¹<= ᔣ àᑗḄ½¾ú@Ḅᐝ ᙊû⍝ᑮÞᨬ¤8FᳫØ⍝Ḅ6À+3N,gi10m/s2,þÿ⚪(1)ᳫḄᜧ(2)ᙊ⍝ ூ ᫀ(l)8m/s2m/s(2)0.8mூ*᪆(1),-./012ឤ4ᔣ6789ᔣ4ᵫ012ឤ;<=>?@—B2=04ᵫDEF2ឤ;<=>;mH+ᩗK=L4*=>oi=8m/s,P=2m/s;(2)ᳫmᑮRBS,-DEF2ឤ4ᵫDEF2ឤ;<=>jnv]=mg-2RT2,ᳫᙠᙊ⍝VᙊᕜX04ᙠ8S4ᵫYZ[\;<=>mg+F=v2.]^*=>7?=0.8mo9.ᙠᐝcdeᙢ☢hᨵjK1M=3kgoᑖqjᐝcᙊrsḄt4K17?=2kgḄᳫoo=5m/svdeswcᙊrsswxᙢ☢Ḅy/z={0.8m,|@?g}10m/s2~>JUWUJLᙠ1)ᳫswX0ᑮᨬyS(t)Ḅ,-4ᳫtVḄW-,(2)ᳫᙢ4tᳫḄdexZoூ ᫀ(1)6J(2)2mூ*᪆
28(1)ᳫᓣᨬyS4ᱥde4tᳫde9ᔣ012ឤ4?:mvo=(m+জtᵫ0F;ᳮ=>ঝὶজঝ*=>W=6J.(2)ᳫᑮsw4ᳫtde9ᔣ012ឤ4=>"“=?+“@ঞᳫtᵫFᐵ.=>52=,+A/¢টὶঞট¤*=>s=-lm/sঠ2=4m/sডᳫt©4ᔣ6VeªX04tᔣ«VᒴX0=ঢL=(V2-V\yt®ὶঠডঢণ¤=>A=2mo10.±ᡠ³4j´KḄjµ¶;ᙠcᙽ84¸jµcᙽCº»¼½º4¾☟Áhᙠᙢ☢y7H=5mḄᐝcdeÃ☢.Äᨵjcᙽ/ᐝcÅ☢Ã☢@=1.8myᜐᵫ☟ÁcÇ4cᙽBÈÉÊËÌÍᙠjÎÏÐÑ0cᙽCᔣÒX04Ó,jÔ4cᙽῃ4Ö×ᙠdeÃ☢ᒴX0jÔx©Ã☢ØÙÚÛ.ÜÝÞ4=1kg,ms=2kg,me=3kg,}g=10m/s2,^ßàáâ@.~:(1)cᙽAcᙽBÊËäåḄᜧ;(2)æÏÐḄᨬᜧឋèF(3)cᙽCᙢSÃ☢ØÙḄdex.ூ ᫀ(1)2m/s(2)3J(3)2mூ*᪆(1)cᙽAᐝcÅ☢hyᜐᵫ☟ÁcÇḄ,-DEF2ឤ4éᐸcᑮdeÃ☢Ḅ71,ᵫDEF2ឤ;<ᨵᵨ*=°]=6mzscᙽ48ÊËḄ,-4/ஹB./Ḅ012ឤ4ÊËäåᐹᨵᐳñ,
29é7V2,ᵫ012ឤ;<ᨵmAV\=(mA+mB)V2,*=2=/1=2m/s(2)cᙽ/ஹ6ÈÉÊË©cᙽjÎÏÐ4ÏÐḄ,-DEF2ឤ4æÏÐḄឋèFᨬᜧ4cᙽ/ஹ8ஹC4é73,ᵫ012ឤ;<ᨵW5=(nu+/n//+mc)03,*=V3=^vi=lm/sᵫDEF2ឤ;<ᨵE+7M«)U22-//Md+/MB+mc)V32p*=£p=3J(3)æÏÐøùឮûüᯠþ4cᙽῃ4éÿ ᙽ/ஹBḄ04,ᙽCḄ05,ᵫឤឤᨵ( +B)02=(#+B)04+85+niB)v/=3(4+WS)V42+g+2,-04=0,.=2m/sᙽC12☢456789:;<x=05>>77=^gz2,-x=2m.
