2022届北京市延庆区中考物理押题卷含解析及点睛

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2021-2022
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14(INxlOcm)/8N=5cm(3)᪷^ᩨᩚḄÄ⊝ᩩÏÍ!ḄÖᦪFÐÐiL/L×(10cmxlx0.05kgxl0N/kg)/10cm=lN»ᔣÂØÙÚª,k$kÑÛ0ÑᑣᜧP(4)»ᵨÝÞËß/àáÝᩨᩚḄÑÛḄâ/Û,-ᑣFd=FÔᦑᩨᩚfÄ⊝.21ஹÂãᵯvᵯq⊤ᵯ0.7Wூ᪆௃(1)äᔠᐵækᘤḄᱏ´ᑮkᨬᜧᜐḄᨬÂH6ãᵯvP(2)ᵯé)ê⁚ëìᵯíîὶᵯéᵯq)4.5Vïᵯv©ᵯq⊤îὶᙠᵯv©ᵯ⊤ðñvᵯv©òósᨵᵯᵯq⊤(+|)0-3V)ᵯéᵯqᦑôäᔠᐵàõöᓽᐵᔲᑣøùúᵯq⊤P(3)ᵯ⊤îὶᙠᵯv©ᵯq⊤EOὶᦋà᝞£mᡠdT(4)©ôÈ⁚kᘤḄᱏᵯq⊤ḄdᦪL5Vᓄᑮ3V,ü#᝞mᡠdḄm¢ᵫw¯Ḅᵯk°g/ḄᓣÁᵫU=/RH_ᵯqḄᓄ+ᜧwᵯḄᓄ+᝞mᡠdᡠ6H6ᑨm¢Ḅÿᙶ᪗ᵯ

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16ᦑ¤¥᫏Ḅ~᳛TP=Pi+Pi=P¯+¢H=550W+U00W=1650WBᵯᨨᘤᙠ¤¥᫏²³´µ5minᑁ¹ºḄªTQ=Pt=\650Wx5x60s=4.95x105JK(3)᪷4஺=c,”4;⍝6kg»ª¼ᓣ¤Ḅ¥YTQ4.95xlO5J_______஺"cm1.8xl03J/(^?࠷)x6kgDDD45,8C(4)¾(1)H¹ºḄªᵫ@ᩭᦔ᳛30%Ḅ᯼ᳫ᮱ÄÅ,Qᵫ஻=/,;⍝᯼ᳫÈz]ÉḄªTQ4.95xUj0®=—=---------------=1.65xlO6J730%ᵫ஺]=":;⍝◤⌕z᯼ḄTQ_1.65xIO஺j=0.055kgV-3xl07J/kgrᵨᵯᨨᘤḄÌᑭᵨ᳛¤ஹᡠRrᵨᵯᨨᘤSᨨÎrᵨ᯼ᳫ᮱Ï.24ஹ(1)6V(2)9WூP᪆௃(1)§ᔠÓᐵSᵯ7H§ᨵᵯ⊤Ḅᦪ0.3AᓽÔÕ□Ḅᵯ0.3A஺«=20஺«*+ḄᵯU=RiI=2OQxO.3A=6V(2)ÓᐵSஹS1ᔠKi#¡ὶᵯ⊤×7ḄᵯÔÕ¡ḄᵯU6V3ᐘ
"I"ᡠR×7HḄᵯ/w=1.2A+0.3A=L5A,ᵯ7ØὑḄ~᳛P=W=6Vxl.5A=9W.ூÚÛ௃(1)᪷4ÜÝ9ÞÉᵯßᵯ(2)᪷4ὶᵯ7ḄᵯᱯÚÞÉ×7ᵯáᑭᵨ¢=0/ÞÉᵯ7ØὑḄ~᳛஺âஹãᔠÌä⚪(ᜧ⚪ᐳ3⚪ᐳ18ᑖ)25ஹ(1)70001000(2)5m,5xlO4Pa(1)2.å10/᝞

17ூ᪆௃æ⚪ᑖ᪆ç(1)ᵫ:;èᙽêᨵëᐭ_HìäF=7000N,¡ìäíîäᑣèᙽîäG=Fi=7000N,èᙽᐰëᐭðñäíîäòóìäF=G-FS2=7000N-4000N=1000NS(2)èᙽôõö_☢ᑮõöùúᵨḄût=140s-40s=100s,ᵫü=5ýQùúþYh=vt=0.05m/sx100s=5m,¡ᜐùúÿᑮḄp=pgh=lxl01kg/m1xl0N/kgx5m=5xl04PaF3000N,(i)ᵫAmFgv᣸v#=—=,33gIxlO^kg/m^lON/kg7000N700keᙽᐰᡠV=Vflf=0.1mi,m5=Gg/g==700kg,p=m/V=-----10N?kg03mὃḄ!"Ḅ#ᵨ%&ḄḄ'(ᜧ*Ḅ26ஹ2515C50஺Ḅ./01RiḄᵯ34ᡈ0ᜧᵯ6Ḅᵯ஺ூ᪆௃(1)᪷89:;<=>?᛻A150cBḄCDᵯ3R2Ḅ3425kC(2)EUi=2VFG1CBU=U-UI=12V-2V=10V2/=4=—_=4x10-45X103஺==£^_=25x104Q=25*£lI4x10ஹᵫ9H/IJBḄ?᛻A15࠷,JᓽឤAMḄᨬOA;EUi=4VB,U=U-UI=12V-4V=8V24F=8x10^SxKfQR8.=104Q=10*Q2I8x10-4ᵫ9H/IJBḄ?᛻A50࠷,JᓽឤAMḄᨬQAᡠJឤAMḄARSᢝᙠ15࠷50CḄ..(3)WXYJឤAMᑁḄA[ᓄ.ᙠ](2)^Ḅ_ẠabOcd/01RiḄᵯ34ᡈ0ᜧᵯ6Ḅᵯ.27ஹᵯef*gᵯeh#DBijckBlmᜧnomᜧpqHᓻ◅ឋᜧ஺ூ᪆௃(1)ᵫuᦻᑁw/xJyᓫ{|}~^ᑭᵨᵯef⌴Ḅᵫc="ᵯefḄf”ᵫgᵯef

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