2023年广东省梅州市中考物理模拟试卷（附答案）

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2023
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qḄqN93஺13.r=tuvூ᪆௃wᫀy4⚓
ᐳ14⚓

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tuvḄNᨬ
ᦑ¡Ḅᵨh£ᑁ¤¥¦ḄᱥBᨬᨵ1Ḅ=Yuv஺14.1812720ூ᪆௃ூᑖ᪆௃ூ௃প©ᱏP«h©n3jᘤḄJ
®ᐭᵯ°Ḅᵯjᨬᜧj±10஺Ḅ>²
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ᵯÀ⊤Íᦪ36V,ᑣºᵯ°ᵯ»,,U'6V…/=—=——=1.5AR4Q᪷´ÂὶᑖÀ1¹º©n3jᘤ¾¿ᵯÀUP'=UaU=18V-6V=12V᪷´/=Ð1¹º©n3jᘤ®ᐭj±1\U'12VPI1.5AᡠÒÈnÉÊs,ᵯj3ᓄ3C,C©ᱏFJᔣa¿ÈnÉÊsË
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ᓽᵯÀ⊤ÍᦪR—=3Ax4c=12V[3]Öᵯ20s,ᵯjR×ÅØḄONQ=ÙÚ=0Atx4஺x20s=720J15.1.50
1.50~1.52ᙳ1
ÜÝᦪÞºI9ßᑖà37.62168.51400.3471.4ூ᪆௃ூᑖ᪆௃ூ௃[11F}J1Òáᑮ
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ᓽw=50g+20g+l.4g=71.4gwᫀy6⚓
ᐳ14⚓

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19ூᑖ᪆௃ூK!௃²1´µ1¶·ᵬR/¹ᑮ∑»¼ᙠAnᱥ¯ᜧ:¾ᯖ¯^%ᐝ¬®ᑮᐝ¬ÀᨬÂᨎḄyᐝ¬ᙠ¾ᯖ¯ᑮ:¾ᯖ¯Ä]y¯[ᜧ¾ᯖ¯@:¾ᯖ¯᪷DÅÆwḄᡂyRSᡂḄ[᎔È@ḄÉyᑭᵨEᡂyᳮR/ᑴᡂ᯿©஺ফÍÎwᱏ[ÏÆwᐹᨵÑᦣ}ᵨ@BÓÔÕḄÍÎwᱏ¼ᙠ∑»NÅÆwÄ]C☠ÍÅÆw×ØÙÅÆwḄᐝÚÛᩭḄÑᦣᡂḄÂᨎyᙠᐝ¬Ḅ£ÝÞßᙠᐝ¬pᑮÂᨎḄyᐝ¬Maà£Ý^%ᓽ@BMaᔣª«ÅÆwÝᔣ^%ᐝ¬஺µ3¶·ᵬR/¹ᑮâ∑»¼ᙠ8n∑»ᡠᙠḄWX[¾ᯖ¯/ᑁᱥ¯@¾ᯖ¯᪷DÅÆwḄᡂyRSᡂḄ[±ydȼᜧḄ±yå8æoMᙠᐝ¬`çè஺²2´µ4¶ëᴻí¼ᙠvî☢vïḄðᜧñòëᴻíMᚖ®vî☢¼Xå᪵yᡂᙠî☢ᑁôõyḄWX஺ম⌱ø᜜úḄ:∑»R/ᵨᐸ\∑»0û∑»ᡠᡂḄ±y§üᜧ@Ûý:∑»ú×ØþRS⍝
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¯°ÔÕᑮᮣ×ᵯ¼hḄᢣ┐ᔣÚÛÜèéD-ᮣ×ᵯ¼hḄᢣ┐ᔣ¾ÛÜ஺[3]êÝybcëÃmÒAÓᔣ}Ðᐭᔣ<ä'ÃãḄÆᔣ>ᨵPᓄᦋPç¿mḄÄÅÆᔣàáḄᵯ¼Æᔣ:áPᓄᵫÞ¹ºᵯ¼ḄÆᔣ¿mÀᑗᒘùAÄÅḄÆᔣᨵᐵ஺ভàṺᵯ¼DEᵯùº;îïðᘤòᳮEêᵯ¿mᙠÃãpᑮkḄÍᵨôÅᙌÊËÌEᵯùºòᳮàṺᵯ¼ᡠ%ÅᙌÊËÌEᑭᵨDöòᳮ÷ÍḄ஺(2)[5]_¤ùú¥ûᔠ¯ᐵýᵯßᨵᵯ¼êᵯ¿mþÄÅ_¤ùúḄÿ⊤ᵯᨵḄᵨ஺[6]ᦔᢞᙠ!"#Ḅ$%&ᨬ(⌱ᵨ*&+,ᵫ.*Ḅ/012345Ḅ6&ஹ8&*Ḅ9:1;Ḅ<=>᝱@᧕ᦋCDEᴻ&%.GHIᵯᵯJKᨵᵯLLMEᴻ&IN<=Kᨵᦔ஺ᦑ⌱Co22.(1)3xlO5PaD(2)2xlO3N;(3)2.25kgூd᪆௃ூᑖ᪆௃hᫀj10⚓ᐳ14⚓

21ூod௃dp(1)qrḄs9:,m=280kg+2.72t=280kg+2720kg=3000kgr☟uvwxJ☢Ḅz,F=G=wg=3000kgxl0N/kg=3xl04Nr☟uvwxJ☢Ḅz{,=^^xlO'Pa(2)qrḄ|0v=30m/s,}~᳛%”=60kW=6xl04Wᒴ|"<=ᑮḄᱫ,x⊝ᵫᡠ,^6X10^W.F===2X10Nv30m/s(3)qr60kWḄ}~᳛lOminf=10min=600sᡠḄᨵᵨ,=6xlO4Wx600s=3.6x10?J᪷Ḅᦔ᳛ᐰ¡¢£¤Ḅ:¥ὑḄ9:,஺¤9x104=—=-----7-------=2.25kgq4xlO7J/kghp(1)r☟uvwxJ☢Ḅz{,3x105paD(2)qr30m/sḄ|0wxᒴ|"vrᡠ,2x1(PND(3)©qrª=Ḅᦔ᳛40%,60kWḄ}~᳛lOmin,¥ὑ2.25ᓟ¬Ḅ஺23.(1)0.5AD(2)6.6xlO4JD(3)440Wூd᪆௃hᫀj11⚓ᐳ14⚓

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3º»ᐵSi½ᔠS2¿Aᜐv®¯°ᜐ.³ᢱᵯJÀᨵR/µᵫ?=ÂRR/ḄÃU2_(220V)2=220Qὡ-220Wº»ᐵSiÅ»S2¿4,R/Æ&ÈὶÊvᵯJᵯᨬᜧ᪷¶=ÌÍÊvsR᳛ᨬ1®¯°ᜐ.²³ᢱÊvᵯJḄsᵯU2_(220V)2=440QÎIIOW᪷ᵯḄÈὶR2ḄÃR2=R-Q=440Q-220Q=220Qº»ᐵ,½ᔠS2¿B,R/ÆR2ÐὶÊvᵯJᵯᨬ1᪷¶==ÍÊvsR᳛ᨬᜧ®¯°ᜐ.ѳᢱᔜÓJḄᵯLᑖÔU220V=1A220Q220V=IA220cᑣÖJᵯL/=//+/2=1A+lA=2AѳᢱµvḄ᳛P^=W=220Vx2A=440Whp1®¯°ᜐ.²³ᢱµvᵯJḄᵯLᜧ10.5ADhᫀj12⚓ᐳ14⚓

232׺»ᐵSi½ᔠS2¿A,®¯°ᜐ.³ᢱvµ5min¥ὑḄᵯ¹6.6X104JD3×®¯°ᜐ.ѳᢱµvḄ᳛440W஺24.10஽180².àáâãᡈ¤ᜧ×åூd᪆௃ூᑖ᪆௃ூod௃1×[1]æçḄᜧ1100nm=100xl0-9m=l0-7niফéêḄ|050m/s=.80k/h----h36002×[3]ðzæñᑁózN².æñ᜜ᜧóz+᪵æñᑁö÷øḄùóúINLᑮû᜜஺3×[4JCTXᐝþ,ᑭᵨᵯ⌴ᩭḄ஺4[5]যḄᙊᴻ!"#ᜧ%&'()*+Ḅ,ᦪ#ᜧᡂ/0஺25.C4551x10-530;<ூ>᪆௃ூᑖ᪆௃ூB>௃1[11A.ᵫᦻFGH&IJKLᑭᵨINᵯOP⍩RḄ&ᦑA┯UVB.IJKXᜓᙠ[Ḅ\]ᑖ^_90dB,*JḄcdef⌼ᡂhijk&ᦑB┯UVC.IJKlmnḄo᜜KGqᑭᵨᱥᔣ᜜tuo᜜NvwexyḄᱥz{OP|᤬&ᦑC~VD.IJKl☢mᨵḄ᤬0K&ᡂ0ឋ᯿Kᳮ᪵&ᦑD┯U஺ᦑ⌱C஺2IJKᒴᓣ[&IJKᩭ&ᙢ☢*IJKᩭ&ᙢ☢*IJKL45Ḅ஺[3]ᵫ⊤ᦪGH&IJKḄ᦮K500g,ᐸid¡G=mg=500xlO_3kgx10N/kg=5N©ᫀ«13⚓&ᐳ14⚓

24(3)[4]⌴ᑮ⍩Rὅᜐᡠᵨ[²³¡s_s_3000m=lxW5svc3xl08m/sমeὃ⇋⍩R·¸Ḅ¹º&IJKqᨬ¼y½P&ᨬ¾½PḄ¿Às'=v't'=150km/hxh=30km60য!IJK◤⌕|᤬ᙢ☢lᐰÄ᯿ᱏ[ÆÇlᓣ&[ÈᜧÉᱥ·&᪷Ë%ᡂ0ÌÍÎᱥ0Ï0Ð<&⌕;<0·&ᓽ⌕;<%ᜮÓᐝᨔᱏ²Ḅ·¸&Ö|᤬ᑮᨎḄØ☢஺©ᫀ«14⚓&ᐳ14⚓