2019-2020学年常州市名校物理高一(上)期末统考模拟试题

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2019-2020
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44(1)A©ᙊ⍝Ḅᨬp}Mªᑮ⍝Ḅ)*(2)ᐹᨵḄᨬᜧឋ®.25.᝞2ᡠ4ᵨC¯°±mḄᳫᳫᙠno☢ᑁ´}0!µᕜ$%஺ᳫ!ᙊᕜ$%ḄL஺ᳫᙠᨬp}AḄ#9ᜧv,·¸¹º»§N#9g,&'A“•/L\ஹ»••♦*B(1)ᳫᙠᨬp}AM¯¼Ḅᜧ*(2)ᳫᙠᨬ½}BM¯¼Ḅᜧ஺ூ¿ὃᫀ௃***14.1$315.1.84xl0616.·ᙠ@ᩩoŦ#(1)40(2)12017.V3s25mஹÆÇ⚪1Z-X^l.iSnvs^3.88ms2È”@...0.200kg1O18.জ6ঝVঞ6ভ19.CC0.4220.(1)ÊË(2)ÊË(3)Aஹ⚪21.(1)320N(2)0.5ூ᪆௃(1)᝞2ᡠ4(Í᦮Ϫᑖ᪆Ð'ÐF=mg-Fsin370=320NN

45(ᙢ☢)'FJ=F=320NN(2)ᔣ'Fcos37°-F=0Ff=஻“ᵫÓÐ'=஻0.5f22.(l)a=lm/s6ᔣᔣG(2)Xo=2m(3)ti=lls(4)x=2mூ᪆௃(1)ABᐜ!ᒴN#oÅ$%ᵫÕÖ×ØbÙÐPmg=ma,ᑣABKLMḄN#9'a=ug=0.1X10m/s2=lm/s2.ᔣᔣG.t]=--Ls=2s<2)ÛABÜᑮ5〈7#9ÊËMᡠᵨM+'°ÞV11ᑣAB$%ḄOP'Xi^at^XlX22m=2m.(3)ÛABÜᑮ5〈7Ḅ#9ÊˤAB!ᒴ#oÅ$%ᐸᒴ#$%ḄOP'X2=AB-xi=20m-2m=18m,t_Xy_16$_ᑣᒴ#oÅ$%M+'7~,ᡠ8ABᵫ5〈7=>$%ᑮG>ḄM+'t=t+t=2s+9s=lls.I2(4)Ê(%©á5〈7(ᙢOP'xj=vt=2X2m=4m,1ᑣABᙠ5〈7ᑜTUVḄ:9'Õx=xj-Xi=4m-2m=2m.}â'ã⚪g⌕ὃåæç(ᒴ¦#oÅ$%èÙéÕÖ×ØbÙÊᐵIëḄìíÍᳮïã⚪ḄᐵðᳮñABᙠ᦮©á]Ḅ$%èÙòᔠÕÖ×ØbÙÍ$%æÈÓôᔠ&.23.(1)2m/s(2)6sூ᪆௃ூᑖ᪆௃(1)᯼ᙽõt5〈7¤!$%᪷÷$%ḄèÙ&᯼ᙽᙠhḄᨬp}MḄ#9ᜧ*(2)᯼ᙽᙠ5〈7ᐜN#¤ᒴ#᪷÷ÕÖ×ØbÙᐜ&N#9øòᔠ$%æÈÓ&᯼ᙽᙠ5〈7$%ḄM+.ூù௃(1)ᵫH=ggtzÐú+ᬯ@3ᑗX=VotÐ%=—=2/s(2)ᵫcos0-mgsin0=maa=0.4m/s26A==5saX]——L-x஻ுtan6,ᑣᐳᒴ4=-----=Is6%AᑮBḄ=4+!=6s24.(1)30N(2)6Jூ᪆௃ூ%௃(1)ᩈᙽA(ᨬ*+ᑮᨬ,+Ḅ-ᵫ./ᳮ

46•2RÀÖIBAVA——×Ø2’ᨬ_ᨵF+mAg=niA2kRI:F=30N(2)᪷U¸ឤÛ¨IÜVLIUBVB-nuv2HIVB=2m/sÝÞßàáᨬâ\VBஹClmqãVᨵmBVB=(mB+mc)vHIv=lm/sÝÞᐹᨵḄᨬᜧÝឋµQEp=-niBVB2--(ma+nic)/22I$&=6J2.25.(1)w--mg;(2)m—+5ègLLூ᪆௃ூ௃(1)ᳫᙠA_éD᝞ë1ᡠì஺11´DníîïDRḄᔠDñòᳫᔣóDVᨵ=Lt(2)ᳫôA_ᑮB_TUö÷⍳ùQឤVᨵஹú=6m/+2mgZᡠ¦ó=W+4g£ᳫᙠB_éD᝞ë2ᡠì஺▼mg12´DníîïDRḄᔠDñòᳫᔣóDVᨵü-mg=*ZJ2ᡠ¦ý=5mg4-w—

472019-202023,ᱥᳮ526678ᔁஹ⌱<⚪1.᝞1ᡠ@-ABCmḄDᳫFGHIA0JKLMNᔣᡂ9QḄRSTUḼᜐX☟Z[᝱-]^IA0_`-ᙠIA0_`Ḅb-cᑡefghḄij
A.STḄklF=mNB.STḄklF=mgsin஺cost*C.DᳫḄoCpD.DᳫḄoa=gsin®2.᝞1ᡠ@-qCGḄDᳫ-rᙠRAstucv-/wxᢞ+0ᙠLMH☢ᑁ|.஺᦮~/.ḼḄ|ᔣ|.jᓽDᳫḄᵨliᙠ1@H☢ᑁ஺tuᯠcᚖ-ᑁᙠឤGHlFḄᵨc-tuLMNᔣḄQo6=30°,tu5ḄklCT஺ᐵXqlGஹlFJklTḄᜧDᐵU-cᑡefghḄiA.GᨬDB.FᨬDC.TᨬDD.Gᨬᜧ3.~8NḄlᑖᡂ~ᑖl-cᑡᔜ/ḄᨵjA.1NJIONB.10NJIONC.10NJ5ND.20NJ20N4.cᑡᐵX᥅lḄef-ghḄiA.¡ᑮ☟᥅lḄᱥ¢☟ZB.¡ᑮ£.᥅lḄᱥ¢£.C.ᱥ¢£.᥅lNᔣKᐸ¥.Nᔣ¦§D.ᱥ¢¨ᨵ᥅lᵨ-ᑣᨵSlᵨ5.ᙠᱥᳮ2©-⌱ª~ᱥᳮBḄᓫ¬C▭ᓫ¬ᑴḄ°±ᓫ¬-ᑭᵨᱥᳮB¨ḄᐵU³´µ¶·ᐸ¸ᱥᳮBḄᓫ¬஺¹ºF=ma,ᐸ©F⊤@ᵨᙠᱥ¢5Ḅl-m⊤@ᱥ¢ḄAB-a⊤@ᱥ¢Ḅo஺ᑣlḄᓫ¬ᵨ▭ᓫ¬ᑴḄ°±ᓫ¬⊤@¼½iA.kg,m/sB.kg,m/s2C.ND.N•s6.᝞1ᡠ@-ᙠᒴ|.ḄGHᙊ¿ÀÁᜐRÂ~Dᱥᙽ-DᱥᙽḼᙊ¿Ãᒴᙊᕜ¥.-Dᱥᙽ¨ÅÆefghḄiA.DᱥᙽÇ¡ᑮqlJÈᢝlḄᵨB.Dᱥᙽ¡ᑮqlஹÈᢝlJᔣÊlḄᵨC.Dᱥᙽ¡ᑮḄ᥅lËÌÍᔣÊoD.Dᱥᙽ¡ᑮḄ᥅lᢣᔣᙊ¿᜜Ð7.᝞1-ÑÁᳮÒsÓACஹBCUḼÔᵯDᳫa,ᙠDᜐḄÔᵯDᳫbḄÖ×Ølᵨc-sÓACஹ

48BCᜐXÙM[᝱-BஹCஹDᙠÚᩩGHÓ5-aஹbDᳫᙳÝ+ᵯ₹஺cᑡ⌱⚗ghḄiA.àáᜧbᳫḄÔᵯB-ACÓḄkláᜧB.àáᜧaᳫḄÔᵯB-ACÓḄkláᜧC.à^bᳫâMÓCDᔣã☠åaᳫ-ACsÓḄklæᢝçD.à^bᳫâMÓCDᔣã☠åaᳫ-ACsÓḄkláᜧ8.èéញ|ëᜐìíiîìïᦑñòᙢÔ஺᝞1ᡠ@-èéញ|ëᜐiᙊô-õö÷øùḄ᳛CV஺-ö÷ាüýᨵᔣèéᑁ᜜У.Ḅþÿ஺ᑣᙠᜐA.☢V஺ḄB.☢V஺ḄᜧC.V஺ᔣᑁD.V஺!"ᔣᑁ9.#$ᵯ&'()Ḅ☟ᵯ₹,-./■1☟ᵯ₹234⌼ᡂᓻ8.:ᑡ<=>?ᨵAB'CDEḄFA.GH'IJKᙢᵯMB.ᵯNOP'ᝅᨵRSTᝅC.ᓺVWXYᢝ〉Ḅ\]D.^_`☢Jᨵ!ᩩbᙢcd10.!ef"Ḅgh᪶jklM,ᜐ☟1m᝱.op!ejklmḄqh`rstuopḄqhḄvlE஺ᑣgh᪶rsḄvlmmMmA.EoB.—EoC.---------EoD.----------EoMM-mM-m11.᝞xᡠzᳫᙠ|}ᔣ:Ḅ~Fᵨ:|}~Fᳫᔣ'}ᑮ]ll1ᑣᳫᙠ'ᓣ>A.ᳫvᨬᜧឋvlB.ᳫᙠvᨬᜧC.ᳫvl~vᨬᜧD.ᳫḄvᐜ`ᜧ12.᝞xᡠz,aஹbஹceḄᳫ,aᐝ☢⚔¡ᵫ☟1£¤ᵫ:bஹc!¥]ᑖ§£¤ᵫ:¨©ª«.:ᑡ¬E®Ḅᨵ¯°

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51(3)ᑡ⌱⚗.cJd,efghiQḄjkᱥᳮQ/(Z⌱⚗nḄop).A.012:;Bᳫ=iQAᳫ1ᙳ!"ᑮ0"ḄstB.Aᳫ?BᳫiQAᳫ1ᙳ!"ᑮ0"ḄstC.12AᳫBᳫḄ32D.12G"uLJ012☢Ḅwx(4)@nyQzឤᑣ◤f~ḄᐵU9.ஹ⚪21.ᵬB=ᙢᔣᙠj016yᵬxvi=16m/s,xট=2m/s2ᒴyBxV2=4m/s,xa*lm/s?ᒴy.(1),u⍗nὅḄᨬᜧst(2),u⍗ᡠ◤Ḅ=.22.20041ᨴᡃ¢ᨴᳫ£i¤ᑜ“¦§¨_”©ªy«¬®LᨴᳫḄ£¯°ᩭ°²ᐭ.2007ᡃ¢O³“¦§1´”£ᨴµ¶2010·O³£ᨴµ¶“¦§¸´”2013“¦§¹´”ᡂ»¼½“᳝ᐢ´ᨴᳫ”Àᨴᳫ.ÁÂᙢᳫÃÄ9ᙢᳫ⊤☢Ḅ&Æx9g,ᨴᳫÇᙢᳫyḄᕜÉ9ÊᨴᳫÇᙢᳫḄyËÌÍᒴᙊᕜy.ÏᨵÑÆÒQ9G.(1)ᙢᳫḄPQ(2)ᨴᳫÇᙢᳫyḄÓ⍝ÃÄ(3)@ÁÂᨴᳫÃÄ9r,ᨴᳫ⊤☢Ḅ&Æx9H.ÕÖᩭḄ¦§£iᘤÀ▮ᨴᳫ@⌕ᙠᨴ6ᳫOj⚩ᨴᳫḄµ¶ᨬÛḄOx9ÜÝÞ23.jkßà.á☢âx94m,jkGãäåᶍg¤ḄçᙽgḄxV஺á☢⚔ëá☢ç=ᐸçstx?x¸,ᴂ'ḄᐵU-î(ᓽX—?-î)᝞-ᡠD.°$«12*m")(1)çᙽçḄxᜧÛ.(2)@çᙽçḄx95.0m/s,ᑣçᙽëá☢çḄ=9ÜâÞ24.᝞-ᡠgÓ⍝ABC<ñ6òóᙠ01ô☢As01ᙢ☢wH=0.75m,Cs01ᙢ☢wh=0.45m,஺jPQm=0.10kgḄÛᱥᙽA"☟çC"01xõ!ᙠᙢ☢ḄD"஺öi÷CஹD"Ḅ01st9x=0.60m஺g=Wm/s2,g¤øùúÆ(1)ÛᱥᙽC"õ=xḄᜧÛv“

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53À3(1)ᙠᙢᳫ⊤☢_ᵫèMgÀÒᙢᳫḄé=ê1G(2)ᨴᳫᙢᳫLM_ìᨵíWîïᔣðW_ᑣᨵ£ò=óôJT2ᨴᳫᙢᳫLMḄõ⍝÷ør==᫏J2(3)ᙠᨴᳫ⊤☢_ᑣᨵû=üᓃ6r23.(1)2m/s2(2)1sூÀ᪆௃ூᑖ᪆௃᪷þᒴÿ
ḄஹḄ᪵᳛ᔠ.ூ௃11_1m(1)ᵫv/=2ax,-“᳛”01᪷345-[W,ᡠ:;ᙽ=;Ḅ>ᜧ@a=2m/s2.(2)ᵫ45-C;ᙽḄD04m/s;ᙽFG;ᑮ☢ᨬKLᦑ;ᙽ=;ḄD05.0m/sP;ᑮ☢ᨬKL.Q;ᙽᙠ☢SḄ;0t,ᑣx=vot-'at?,Zt=ls,t=4s«]f=¹$_2sv»=4m/s,a=-2m/s2,_=v=0m/s,ᦑ;ᑮ_`Ḅ0t0=fl~.ᦑcdet=4SoூLg௃Cᒴi
Ḅ◤⌕ὃ⇋ᒴiᑮ_`noᔲqr஺24.(1)v=2.0mfs(2)Wj-0.10Jcூ᪆௃ூ௃(1)wCᑮD,᪷3z{|}5Z~
ᔣL=],zᔣx=v/Z@ᱥᙽwCLḄᜧ@^(2)@ᱥᙽwAᑮC,᪷3Pᳮ5Zg(ὡ-᝞-^Z᥅=0.10J

54_M/V_________25.প=Mফ=ூ᪆௃ூ௃(1):BẆ4᪷3z⊝ᩩ¢£¤¥ᓽv7M4V7Wgg=§4>8=:A0Ẇ4᪷3©ª«¤}"'Z(2)A=®¯°᪷3±²P³ឤ}ZV,=”ᑁ·

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ḄA.ᓤ9ᢣḄB.ᐰ80.8kmᢣḄC.ẆᕒᙠᐰḄ"#ᐸ%&'D.᪷*+ᦪ*-"./01ᡚ3ᱯ•67Ḅ89:;<&43.14km/h2.᝞DᡠF-ᩈHPJKLMᐝOPQRSTUVᙢ☢Ḅ0-ᱥZAஹB\]ᙠᩈH^ᜐT☟ab᝱-dᱥZBḄ⊤☢UV஺ghᩈHPi0j᠒lmᑮo9ᡠFp-ᱥZAஹBqrᢝ☟atupḄvwxyz{A.A|BḄ}ᵨB.B|AḄᢝᜧC.ᩈH|BḄᢝᜧD.ᩈH|BḄ᥅ᜧ3.JᑡᐵT:;Ḅ⊤+-⊤FVᙳ:;ḄA.ᙢḄ:;B.ᳫḄ:;C.1U☢Ḅ:;D.ᑮ᪥Ḅ:;4.᝞DᡠFᱥZ9Ḅv-tD¤-ᵫD"¦ᱥZz{A.ᙠᔣ¨©ᔣ9B.ª5sᑁḄ&251nC.ª2sᑁḄ¯:;ᜧ&1.5m/s2D.°2s±Ḅ²:;ᜧ&3m/s5.³´gµᨵ·ᵯ.10m/sḄ:᳛LMºᙊ¼½⍝-¿ÀÁÂgUV]pḄᢣᓭ┐ᙠ10sᑁᒴ:mMÆ30°஺ᙠd10sᑁ-ÈA.¯:;&ÉB.ᜧ&100m

56C.3rad/sD.⍝m6.ᑡḄA.ᓫmஹkg,N"▭ᓫᑴ%Ḅ&'ᓫB.()*+,-.6ᐗ/3012ᐸ%“301”ᢣḄ6C.789:ᓭ<ḄT180=ᑡ+>7:55ᑖ(@ᢣḄABD.CDEFG%2ὁIJKLEMN᪗PQRSTUᑖA2VWKXNYZ7.᝞\ᡠ^2_+`abcdᵨfᱫhi%Ḅ_2kflim☢ᜳ0A2_+ஹ_Ḅᜧ_ᑖqVlஹV2OᑣVlஹV2ᜧ_ᐵtḄcos8Vjcos6D.R=/sin68.201711ᨴ24v2w%xTyMz2{Kᙠᔜ~FG⚗%Ḅᢈim஺ᑡᨵᐵ᪥yzḄᔜ%ḄA._ᩲḄᡂ5.30m,a%ḄB.ᙠ200nlG%2ᙠ⍝2ᐰḄ6C.Ẇ¢£_¤a1.55m¥ᩚḄ§¨©MNA2ª«XNYZD.ᙠ100mG%2_¬®2G⌱°%Ḅmᙳᨬᜧ9.᝞\ᡠ^Ḅ³´µM¶·%2aஹbஹcᑖqd¸¹ḄºZ஺»¼½:&:À=1:2:3஺ᎷÃᙠµMa%³´Äᡭc2ᑣᙠµMa%2bஹcḄÆFA.3:1B.1:3C.2:1D.1:210.Ç*+Èᙠimᙢ☢2ᑡᐵ>*+Êᙢ☢ËÌḄḄ{A.ᙢ☢ËᔣḄÎÌ2Ïᙢ☢@KÎឋÑÒÓ*+Ô@KÎឋÑÒ2ᡠÕ*+ÄËÎÌB.ᙢ☢ËᔣḄÎÌ2Ïᙢ☢@KÎឋÑÒÓ*+ËᔣḄÎÌ2Ï*+@KÎឋÑÒC.*+ËᔣḄÎÌ2Ïᙢ☢@KÎឋÑÒÓᙢ☢ËᔣḄÎÌ2Ï*+@KÎឋÑÒD.ÕᙳÄ11.WᱥÖÕ60JḄ×MªØÙᔣÚ(2kÛᓣÝᨬZA2Þߪàᜫ10J,âãäåÌᜧ_ÄÒ2æçᱥÖèéÚ(ZḄMªA.60JB.50JC.40JD.30J

5712.Ç_+ᙠim☢LᒴÙëyM2ìwAB,2_+ᡠËᑮḄᱫhÌFÊåÌfîAïÒᓄḄñò2᝞\ᡠ^2ᑣNᵨᙠ_+ḄᱫhÌFḄó᳛îAïÒᓄḄñòõ\%Ḅöஹ÷ã⚪13.ᵯúᡭZûAᘤûAýᘤ.ÛÿᵨḄ___ᵯ“”ᡈ“”.ᵯḄ⚣᳛50Hz◞sᡭ.14.z11ᑖ!"2kgḄᱥ$ᙠ&'()FḄ*ᵨ+,&'☢./0123456F,ᐸ01Ḅv-t89᝞8ᡠ<஺>?@)ABCg=10m/s2{z1{ᱥ$D&'☢3Ḅ1᥅FGᦪIz2{&'()FḄᜧKL15.z5ᑖ(MNOPQ(MKRPST᧕G"NOPḄQKRPK஺16.᝞8<ᱥ$AḄ!"1kg,AVKPḄWX☢31᥅FGᦪ"0.25,KPḄABC"YZ[AᙠKP\]☢ᔣ+ᒴB01.KP☟aᱥ$A,KPWX☢+bDKP3Ḅb1᥅F)"ozgJR10m/s2{a17.cKᳫe5m/sḄBC&'fghᙢjklmfgjk&'lm5m஺ᑣKᳫᙠop01Ḅ3"s.qஹst⚪18.vwxᵨ8za{ᡠ<Ḅstyktz{|Z}ឤᐸpᡭᘤḄᵯ"ᵯe[ᵨḄ⚣᳛ᨵ220Hzஹ30HzV40Hz,ᡭgḄᑖ᝞8zb{ᡠ<஺

58ᡭdwxᙠstpᨵᵯḄ⚣᳛/,◤⌕ᵨstᦪVᐸᩩO(஺(1)ᡭgḄᑨ@ᱥᒴAB+hᑭᵨ/V8(b)pgḄᱥᳮ!eᑏg?ᙠᡭᘤᡭgB@ᱥ+hḄBCᜧK",ᡭgC@ᱥ+hḄBCᜧK",@ᱥ+hḄABCḄᜧK".(2)S]=8.89cm,J=9.5.cm,s=10.lOcmj@)ABCᜧK"9.80m/-,tp@ᱥ¡ᑮ23Ḅ'ᙳ¤)ᜧK¥"ᐸ@)Ḅ1%஺ᵫ§(g¨"Hz஺19.᝞81ᡠ<cᡭᘤ©ᙠª«¬ᵨ@ᱥ1☟a®¯Nᵫ+hᑭᵨ§yktz{|Z}ឤ஺IE2(1)°ᜓḄᘤᩞᨵ?ᡭᘤ(´/)ஹஹ¶ᑏஹªᜳḄª«¬Vᜳ¸Ḅ@ᱥ§᜜º◤⌕Ḅᘤᩞ(»¼½¾).A.ᵯஹᜩ'ÀấṹB.ᵯஹÃÄÅCÆC.ᵯஹᜩ'ÀÇṹD.ᵯஹÃÄÅCÆ(2)ÈyÉstykÊËOstÌ*ᡭgḄp⌱gÎᔠ⌕>Ḅ᝞82ᡠ<8p஺"ᡭЯÑBC"Ò஺⌱ÓÔᡭgḄÕÖA.BஹC…*"ᦪgᐸpEஹFஹGlЯ0Ḅlmᑖ×""ஹ%ஹhi.Û@┴!"m,ᙢ@)ABC"g,ᘤᡭᕜÞ"T."¨tz§stßàp{|Zᔲ}ឤ◤⌕g0ᑮFḄßàp@┴S)âZḄãä!4Ep=,1ZḄåA!(ᵨ⚪pᡠ»¼⊤<).

59(3)vwxᙠstpçè@┴åAḄ1ZᶍKê@┴ãäḄ@)âZêëᐭẆî¤)ïðstḄñò@┴ᡠ¡¤)"f,@┴!"m,@)ABC"g.gᔜᦪᑮЯḄlmh,ôgᔜᦪḄBCv,ᵨstḄᦪõᑴgv?-h8/᝞83ᡠ<8÷ᩩ/§/ø᳛k=(ᵨ⚪p»¼⊤<).20.81"“ùîABCD)ஹ!Ḅᐵû”styk8஺KPüßDᵯýþᡭᘤ(W50Hzᵯ)ÿ஺AấṹṹBuh.(1)ᑡḄoA.ᜧB.ᐜ"#$%&ᵯ(C.)*ᦋ,-./⊝᥅23D.ᙠ56789:ᐵ<=a-?-@A(2)BCDᵫFG⍡IJ/⊝᥅23KLMN஺ᑣPQRᑮḄa-F@TUV@2WḄ@T(⌱Z“ᵬ”“^"ᡈ"a”)஺(3)@3B*RᑮḄcdefgᦪijkᨵmniopq஺ᵫrUsRḄ789ᜧm/s2(tuvᶇ2xᨵᦔᦪz)஺mஹ|}⚪21.᝞@ᡠ,m-lkgḄᙊᝅᙠḄ/ᩚ.ḄᶍᜧᩚḄ☢.:ᩚjḄ᥅2ᦪ“஺8Bg7Lx/☢ᑁᔣ:ᩚᜳ¡“="Ḅ£3F,¤ᙊ☟¦§ᒴ78T©,ªᙠ«2sᑁ¬6.6m,sin53°=0.8,cos53°=0.6,g=10m/s2.(1)ᙊ©Ḅ789ᜧ(2)£3FḄᜧ22.®¯ᕒ±ᙶ®³´☠·B¸ᳫ✌ᐜᙠ»¼½¸ᳫᳫ¾rḄᙊ¿⍝Á¸ᳫ⊤☢PÄÅ®³´Æ3ǸᳫḄᕜÉTïÊᐰÌÍᑮ¸ᳫ⊤☢$P§JLnÎ᝞@ᡠᙠÏ¡9=30°Ḅ☢ÐLḄÑ89V஺Ò/ÓᔣÔqLnᱥÖQRÍi:ÔqijḄ»¼L,×ØÙ3ÚG஺sÎ(1)½¸ᳫḄMï(2)½¸ᳫḄÛR஺23.BÜᑴ⌼ᖪẆᑴÄJÄáâã᳛P=30kWḄLåæçᵨéÜᙠB*ឋVQëWÜ

60Cì±íᕒḄîm=2000kg,ᙠ/ï☢Ðâã᳛ᵫ☟¦ðñòóôWõᑮᜧf=600NḄឤ÷3.(DsÜḄᨬᜧ89vï(2)ùúᑮᨬᜧ89v$ÜÄáḄã᳛ûᓽᦋP'=18kW,æóLýj$ÜÐþ,Ḅ89ñòsKýjᑁÜᡠõᔠḄL24.᝞ᡠᑁḄᙢ☢ᐝḄᳫB,ᢞḄᳫA,ᳫḄᙳ!4kg,"ᢞ#$ᡂ37°ᔣ'()*+,-AᳫḄ./0!1((g310m/s2,sin37°=0.6,cos37°=0.8,tan37°=0.75)45(1)6-AᳫḄ7ᜧ9ফ-BᳫḄ.ᜧ9ব<Ḅ'(=a=10m/s2,,,6-Aᳫ7ᜧ25.᝞ᡠ☟@ᙠBCᙢ☢m=10kgḄᱥᙽᙠFF=50NGᵨIBCᙢ☢JKFLᔣ$BC☢Ḅᜳa=53°,ᱥN$BCᙢ☢ḄK᥅PQᦪ!S=0.2(UV,3sin53°=0.8,cos53°=0.6,g=10m/s2)஺45(1)FFGᵨᙠᱥᙽ,ᱥNḄ'(=ᜧ(2)XFFGᵨ10SYZ[4Z[F\Yᱥᙽᙠ2]ᑁ^Ḅ_`aூcὃeᫀ௃***ஹ⌱k⚪⚪m123456789101112eᫀCDDDDCBDDCCDnஹop⚪13.rs90.02ï14.2,6N.15.ᡈuឋ16.40m/s2,017.Iswஹxy⚪18.3+$2)|1($2+$3)/(($51)/'19.D}F;20.D0.49ஹe⚪21.(1)4.4m/s2(2)90N§gl0Nூ
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62(2)æ-BᳫẆèÄᔠâãänÁÂᑡ´4-BᳫḄ.஺(3)ᔣ'(JKḄ'(=a=10m/s2,ᳫA`6ê7ÃÌḄᔠBCᔣᵫᔠᡂë46Ḅ7஺ூÓ௃(1)Ḅ'(=!a”-ᳫAáᑖ᪆᝞ᡠ஺᪷âãänÁÂ5ìLᔣᨵFcos37°=mg6ê-AᳫḄ7ᜧF=50N(2)-AᳫᵫâãänÁÂmgtan37°=mai5ai=gtan37°=7.5m/s2,.æBᳫ!Ẇè-í᪷âãänÁÂ-BᳫḄ.ᜧN=ma,=4X7.5N=30N(3)Xᔣ'(JKḄ'(=a=10m/s2>ai=7.Sm/sz,ᡠAᳫ`6$Ḅᜳa.ᳫAḄá᝞ᡠ஺ᳫAḄ'(=BCᔣᑣᔠBCᔣᔠᜧ!ma,ᑣT=ᦈJ+Ḅ.=þÿ=56.52/ூ½¾௃î⚪ὃïðâãänÁÂḄñòᵨ⌕4ôõö÷ø-ᳫ*^áᑖ᪆᪷âãänÁÂJᵨ÷rᑖëᡈᔠᡂëẆè஺25.(1)a=0.2m/s2(2)Imூ᪆௃ூᑖ᪆௃(1)᪷âãänÁÂ4ÞFGᵨ,Ḅ'(=ᜧ9(2)ᵫᒴù(#JKḄ(=,¹³´4ÞJK10s,Ḅ(=᪷âãänÁÂ4ÞZ[FYḄ'(=ᯠYᒴù(#JKḄ(=úû³´4Þüö^Ḅ_`஺ூÓ௃(1)ᱥNá᝞ᡠâãänÁÂᨵ

63ᔣN-mg-Fsin53°=0ᔣFcos53°-f=ma"f=uNὶ%&'()a=0.2m/s2(2)10s*Ḅ,-ᜧ/v=aiti=0.2X10m/s=2m/s345F6789:;<=>ᨵ:ABmg=ma2()a2=ug=-2m/s2CDᩭḄ◤⌕ḄHItC=u/8L2=IS<2Sᦑ34K562sᑁḄMNs*(02-v2)/2a=1m2

642019-2020ôýþᱥᳮôÿ
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65A.ᵯ1ᡠ~Ḅᵯ¸¼ᜧ,ᵯ1¾¿ᵯ¸8°B.ᵯ1ᡠ~Ḅᵯ¸,ᵯ¸Àᵯ18°C.ᵯ1ᡠ~Ḅᵯ¸¼ᜧᵯÁYÂD.ᵯ1ᡠ~Ḅᵯ¸¼ᜧᵯÁY¼ᜧ8.ᩈᙽÃᙠÄPÅ☢MᙠÄPᔣᐳ~ᑮÈᓽÊஹ&2᥅ÍḄᵨᩈᙽᜐ[☟rs᝱᝞'ᡠ`ᐸ/ὡ=10MÑ=2ÒÓᱏᑣᩈᙽ~ᑮḄ᥅Í]y}A.10N,ᔣᔣÕB.6N,ᔣᔣÖC.2N,ᔣᔣÖD.09.2017×11ᨴ24ÙN/ÚÛ>?ÜÝÞᙠᔜA⚗á/âãḄäᢈÄP஺+ᑡᨵᐵ᪥>ÜḄᔜé-./Ḅ0A.êëìíîᩲḄᡂñ05.30m,T0òêóHô/ḄõôB.ᙠ200mö/÷7Úᙠø⍝òúᐰôḄ"#]^C.Ẇýþÿ
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68eòôஹõö⚪21.R¨}~L60kgḄøùᙠᓣûÁḄᙢ@$(ᓣûÁḄ⚔ýþᢞ"R¨89:;(89:;,☢ᢞḼm=5kgḄᱥA,ᓣᔣᑮḄᦪ40N,g10m/s2,:(1)!ᓣḄ"#$Ḅᜧ&'(2)!()ᙢ+Ḅ,஺22./ᙽ12$1.253Ḅ4☢⚔78/9:;<=/ᙽ14☢8/>?@A:BḄC#$,Eᑴ?@Ḅ"#$ᜧ&'(2)/ᙽ14☢⚔7ᑮL4☢M7ḄN'(3)/ᙽᑮL4☢M7Ḅ#$ᜧ&஺23.OᙠᔜRS⚗U@VWX᝞YZᳫ஺\]^YZᳫ_ᳫ`⚪bᳫc22Lஹefh,YZᳫghijkᑖ#$Am,noᑖ#$ᜧ&Amஹpᔣqg,rAὃ⇋YZᳫḄuvwxyz.(b}"#$g)(1).~ᳫᙠᳫc0pf$ᜐ#$vjk_<,ᙠᳫcḄP1(᝞Gᡠ),P.b0ḄX1.(2).~ᳫᙠ0p#$V2jk_<,ាᙠᨬf>ᳫeᙠᳫcḄP2(᝞Gᡠ)V2Ḅᜧ&஺(3).~ᳫᙠ0pjk_ᳫerᙠ)pᳫcP_ᳫ0Ḅ3,f$h.324.᝞GᡠᱥAḄm=3kg,ᙠjk☢7ᙠA7>/ᱥᙽAjk☢NḄ᥅¡ᦪN=0.2,g=10m/s2,/᥅¢Ag=10m/s2,K

69(1)ᵨF=9NḄ¤ᱥAḄ"#$Ḅᜧ&¥¦§(2)ᙠ87ᢞM=5kgḄᱥB,☟©ªᱥB,~ᨬᜧ«¬30NḄ®]^ᔲ°±²§25.᝞GᡠAஹBஹC³jk☢ᩩoḄµAஹBNn=0.4m,BஹCNn=0.8m,ᙠAஹB¶ᑖ·@ஹQz¶ᵯ₹Q»ᑖ.6(,Q=-1.6X10-8C,☟ᵯWk=2gxio^^mVc2.KABC(1)ᵯ₹஺QzNḄ¼½FḄᜧ&;(2)CḄᔠÀÁEḄᜧ&஺ூÃὃÄᫀ௃***ஹ⌱É⚪⚪Ê123456789101112ÄᫀCDDDDACCDAABËஹÌx⚪13.1p914.2515.2:116.ᒴ#oÎᵫ17.18µஹÐ⚪18.(1)BCp(2)Cp(3)3.1,1.9p(4)k⊝᥅>$(ᡈAÓ/Ḅ7ÔÕ>f).19.BCpÖ,×ØᵯÙ20.4m/s0.576J0.588JᙠÚÛᐕÝḄßᑁnnஹnháᡂḄãäå«æឤ9.7m/s2èஹéÄ⚪21.(1)2m/s2p(2)480Npூ
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7022.(l)a=2.5m/s2(2)t=l.Os(3)v=2.5m/sa=-==2.5m/s2ூé᪆௃(1)4᳛ÿ⊤
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ᜧ|£0$(2)ᱥᑮ☢Ḅt,1s=-at(3)᪷v=atv=at=2.5Xlm/s=2.5m/s.ூ௃জᜐᳮ"#$⚪⌕'()*ᙶ᪗ᡠ.⊤Ḅᱥᳮ(/.ঝs-tḄ᳛.⊤ᱥ23Ḅ)ᙶ᪗45.⊤6ᱥ4⍗.ঞ9:v-t";?@AB23.ூC᪆௃ூᑖ᪆௃(D᪷FGHIJ23ḄK᪷LMGHNIOPQ(2)Rᳫᙠ0UVWXvzNIYHា[ᙠᨬF]^ᳫ_`IJḄFab_Fcd`IJ23Ḅ᪷23ḄefឋGHIJ23ḄOPK᪷NIOPMGHIJḄLQ(3)᪷J23ḄᱯGHᳫ]^ᳫ_ᑮᨬFḄNIOPcd`ᳫijᑮ]ᳫ_ḄNIOPeijḄ23kl⌮ᔣopᢕrNIWᔣMsAWᔣ23ḄaឋGHᳫ]^ᳫ_ᑮᨬFḄsAOPt᦮vsAOPḄwxcdGHYᳫy0ḄF஺ூ{C௃(1)|Yᳫ}~᪷IJ23ᨵ(2)|YᳫFc}~5ᳮᨵ%=5g©X2=v2t2h=h22X=L2

71():=p(3)ᳫាᳫᑮᨬḄHIt,s,᪷8ḄᱯḄឋ72£ILLLᑮᨬḄMNᔞ.ᑣᑮᳫḄMN£-£=±ᑣ5=.ᙠᔣ¦3333ᒴ,¨7ᡠ&ᳫᑮᨬᡠᵨḄHI«ᑮᨬḄHI¬12஺ᑮᨬḄ®¯⌮ᔣ±²7᪷8ᔣḄ«ᔣḄᐹᨵ´Hឋ7ᳫᑮᨬᔣḄHI«ᑮᨬᙠᔣḄHI¬12.᪷8஻=)7ᳫᑮᨬᔣḄMN«ᑮᨬḄMN14,ᓽ()h3=3஻஺ᵨ43ூ¸௃(º»⚪Ḅᐵ¾¿ÀḄÁ>7&⍝/ᳫÃᙢ6ḄÅ஺24.(1)lm/s2p(2)ÆÇÈÉÊËூ(᪆௃ூᑖ᪆௃(1)AÎ5ᑖ᪆ᵫ9:;<=>ÐÑ(p(2)AஹBÒÓᵫ9:;<=>Ñ)Ô,-7Aᵫ9:;<=>ÐÑ)ÆḄÕ57ᵫÖÐᑨÊÆÇØᔲÉÊË஺ூÚ(௃(1)AÎ5ᑖ᪆ᵫ9:;<=>)F-umg=mai()ai=lm/s2(2)ᢞᱥB,ÝᱥḄÔ,-ᜧ/Þ´7az,AஹBÒÓᵫ9:;<=>)Mg-umg=(m+M)a2()a=5.5m/s22Aᵫ9:;<=>)T-umg=ma2()T=22.5NV30NÈÉÊË25.(1)F=3.24X10-5N(2)E=0ூ(᪆௃ூÚ(௃(1)᪷8ßà=>Ð7Ýᵯ₹ãIḄäᵨ5F=-^,b1åᐭᦪ8():F=9N=3.24X10-5Np0.42(2)QiᙠCḄèéEi=;———=225N/C,ᔣᔣì75+4)kQ'QᙠCḄèéEZ=T=225N/C,ᔣᔣí7îᑣCḄᔠèéE=0஺