江苏省苏州高新区2020-2021学年高二（上）开学考试物理试题（解析版）

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2020-2021
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16O+N-mg᥅Df="N4ᐭᦪ7'8E=2N&'()F,᥅Df=g=5N2*ᐰJKLᵫNOᳮ8Q_S_T=0ᱥᙽᙠ☢ᔣḄsUQߟ-X74ᐭᦪ7'8s=14.4m.2

1717.᝞Zᡠ\LU]ᵯ_ᵫ☟abcdTeᵯfTeLghijklm஺oᚖqrᐭstᵯfLumvUwrxᡭᑮ₯ᐝ}ḄPoL஺'o₯ᐝ}Ḅij.ᵯ_T=9.OXlp"kg,ᵯ₹ᜧe=1.6X10-,9C,Teᵯfᵯ=2500V,stᵯfᵯ஺200V,᩽Ḅ4=6.0cm,d=2.0cm,᩽Ḅᑮ₯ᐝ}Ḅ4=3.0cmᶍᵯ_ᡠL¡¢ᶇ¤¥ᨵᦔᦪ§¨.©:1¨ᵯ_rᐭstᵯf«Ḅ¬eḄ2¨ᵯ_ᡭᙠ₯ᐝ}ḄPoᑮ஺'oḄ®;3¨ᵯ_dJstᵯfJKiᵯ°Ḅ±T.ூᫀ௃পvo=3.OxlO7s.ফ!=7.2xl0-3m.(3)AE=-W=-5.8xl0-i8j.mzூ'᪆௃ூᑖ᪆௃1¨ᵯ_ᙠTeᵯfiL᪷7NOᳮᓽ¾©x¿ᐭstᵯfḄe2¨À_ᙠstᵯfi,ÁÂÃNL᪷7ÁÂÃNÄž©xÀ_ᙠstᵯfiÆÇḄw¥ÈÀ_mstᵯfÉxÊ₯ᐝ}ËUJKL,ḄÌᒴeqlÃNL᪷7ÎÏᐵÑᓽ¾©h3¨᪷7W=eEyᓽ¾©xᵯ_dJstᵯfJKiᵯf*Ôᡠ,Ḅ-.ூ)'௃1¨ᵯfiTeᨵeUo=g஻”¨2'8w=4ᐭᦪ7'8w¨=3OxlO7m/s.2¨Úᵯ_ᙠstᵯfiÃNḄ«r,ᵯ_rxstᵯf«ᙠÜq®ᔣḄwÈy.ᵯ_ᙠ®ᔣ,ᒴeqlÃNLLi=vorᵯ_ᙠÜq®ᔣ,ᒴTeÃNLy—^at2eU᪷7ÞßàáOÅᨵ=ã஻a,eUR1.6xlQ-19x200x0.062'8y—~U>m=3.6x103m=0.36cm2mav2x9.0x10-31x0.02x(3.0x107)20ᵯ_bstᵯf«eḄäᔣålJstᵯfḄio,

18yAᵫZ=7——hL+2Lt2'8/?=7.2xl03m.(3)ᵯ_ᙠstᵯfÃNḄJKiᵯf*Ô,Ḅ-W=eEy=e§y=5.8xl(Fi8jAE=-lV=-5.8xlOl8J.ூoê௃*ëìᵯÀ_ᙠᵯfiḄÃNí⚪LᐵïÌðñòᑖóôḄᱥᳮJKLõöᙠóôḄᱥᳮJKiᱥ+Ḅ÷øùÃNឋLu⌱ᵨüýḄᱥᳮÄÅ.ᙠ'þí⚪«Lÿ⌕
ᩩᐸḄᐵ.᪷ᵯᵨ!"#$%&'()*+ᔠ-./0$ᵯḄ)*123.4ᩩ56〉ᵨ8ᙠឤ;ᵨ<=ᒴ?)Ḅ.ᐸ#@AḄᐵ.᪷ᵯBCᵯ=@DEᵯḄAFGH?ᓄᑭᵨA$ᳮẆMᐰOPQAḄRᓄẆMᵯḄ)*?ᓄஹ123.4ᩩTU〉ᵨ8ᒴVᵯBW〉ᵨ8XᒴVᵯB.18.᝞\ᡠ^_F`2kgḄefᙠᐝhij☢lᜐ8☟op᝱.efḄl⊤☢ᵫij☢t☢᪀ᡂt☢⚔xyxḄz*{`1.8m.ef}~Ḅlᵨ2.5mḄ_F`0.5kgḄᱥᙽᔣ60஺ᵫ☟oᱥᙽᑮḄ<ᱥᙽefḄ}~hlefᐜᙠᐸ⊤☢lijᔣO1sᱥᙽefᯠ=¢£¤ា¦§t☢Ḅyx¨©ª«ef§ᱥᙽḄ᥅®ᦪ`0.2,±()*g=10m/s2.&(1)¶ᡠᨬᜧḄᜧe¹(2)efl⊤☢ijºᑖḄ*(3)ef⊤☢Ḅt☢ºᑖ½Ḅᑗ¿.ூÁᫀ௃(l)10N¹(2)3.75m¹(3)1.2ூÇ᪆௃ூÉÇ௃(1)ᱥᙽ᤮OPQËÌAÍឤᨵI2mg(l-lcos60)=-

19ÇÏv=5m/sᱥᙽᑮ<ᨵV2r-mg=m—ÇÏF=10NÒ2Óᱥᙽᙠefl⊤☢ijºᑖ()*ᜧe%=Õ=2¢m12ᜧex,=vf-1a/2=4mefḄ()*ᜧeumg__.==0.5m/s2-M12ᜧe12x,=~aIr=0.25m2efl⊤☢ijºᑖ*Ax=Xj-x=3.75m2Ò3Óᱥᙽῃefl⊤☢ijºᑖḄ)*Vj=v-at=3m/s]efḄ)*v=at=0.5n)/s22ᱥᙽef=j×ᑣ/?=ggᱏÇÏ=0.6sÛᑁᱥᙽḄ12ᜧeA/==1.8mefḄ12ᜧe

20xf=vt=0.3m221t☢ij*x=x/-x/=1.5m2t☢½Ḅᑗ¿tan0=—=1.2x

21