2019-2020学年高二（下）期末物理试卷及答案

《2019-2020学年高二（下）期末物理试卷及答案》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

2019-2020ᱥᳮᔁஹ⌱⚪ᜧ⚪ᐳ12⚪⚪3ᑖᐳ36ᑖ⚪!Ḅ#$⌱⚗&'ᨵ$⌱⚗)ᔠ⚪+⌕-⌱.Ḅ/3ᑖ⌱┯ᡈ2⌱Ḅ/0ᑖ1.ᑡᐹᨵ᪶᪀ḄA.ᐝᵯᦔB.ᵯḄC.aᦣD.ᐝḄ2.᝞ᡠ"ᨵ#$%&Ḅᓫ⁐ᐝaஹbᚖ+,AB-ᐭ/Ὺ12ABC,3#$ᐝᙠAB☢6Ḅᐭ7ᑮOCḄ9:;/"<#$ᐝᢚ>;?,@ḄP7"AᑨCDEḄb/fYA.ᙠFG@"aᐝᐝHᜧ,bᐝᐝHB.ᙠFG@"aᐝJKᜧ,bᐝJKC.aᐝLM12ḄNOᜧ,bᐝLM12ḄNOD.aஹb#$ᐝP&QRSᐭFGMTN"aᐝUᐰWḄXYZᜧ,bᐝUᐰWḄXYZ

13.᝞ᡠ"[\]\ᑖ_`ᵬஹb#cdefghijkḄl.ᑣA.opNqᵬfḄrstubfḄrsᜧB.vNq"ᵬஹb#fḄfkwᔣ;&C.y2zᑁᵬஹb#fḄ|H}ᙳ`DD.2zᵬḄH}ᑮᐸᨬᜧ"bḄ|H}ᑮᐸᨬᜧ4.᝞`QᑡᔣḄJᙠNqḄJ"ᑣᑡ@DEḄA.S7bNᔣjkB.S7bNᔣyDwᔣjkC.NS7auS7bḄH}ᜧD.S7auS7bḄfᜧ5.ᨬᜧᾯMᔧᵨ“¡¢஻◫¥¦ᴻ¨Ḅ⊤ª"«⊤ª¬®¯°±²Ḅ³´.ᨵᐵ¶ᕒᙠ¸¹º®»¼.ᵨ½ᢣ¿dQÀ¦ᴻ¨"ÁAÂᑮÃᾪ

2ḄÅÆ"ÇÈÉÅÆḄ⚣᳛`500Hz,ÌÉÀ¦ᴻ¨Íᙠcᜧ¢᳛ḄÅJÅᘤy"ÏжᕒLMÑ᦮ᐸḄÅJ"Ó¦ᴻ¨¥ᣵ.ᑡ@DEḄA.ÏжᕒÀ⌕ÖÅJUᘤḄÅJ⚣᳛ÑᑮᨬᜧB.ÏжᕒÀ⌕ÖÅJUᘤ×Ḅ¢᳛ÑᑮᨬᜧC.ÏжᕒØÙ&NÖÅJUᘤ×Ḅ¢᳛]ÅJḄ⚣᳛ÑᑮᨬᜧD.ÏжᕒØÙÌÅJUᘤḄÅJ⚣᳛ÑᑮÚ`500Hz,<〉ÜÝᜧᐸ×¢᳛6.WindowsMediaPlayerWindowsÞßḄQà⚣Íáâ"ãÁäÅÆḄJ.Qåæ`®çèÅJḄ°éêᦔ"g®᝞"ëìᐜᙠî-ïðᱯᑴóôᗓö"ᯠ>ᙠøùὅûᙶḄýþ6ïðÿ
ᜓ
ᜓᗓḄ⚣᳛ḄᵨWindowsMediaPlayer!.#aஹbஹcᑖ&'(ὅ*+ᗓஹ,ᗓ-.☟0ஹ☠2ᗓ
ᜓ3ᦈᑮḄ67᦮Ḅ!#᪵.ᐵ;<

3=>ᑡ@ABCḄDE)A.'(ὅ☠2ᗓ
ᜓ3ᦈᑮḄ6Ḅ⚣᳛F6G⚣᳛HB.'(ὅ*+ᗓ
ᜓ3ᦈᑮḄ6Ḅ⚣᳛F6G⚣᳛HC.'(ὅ☠2ᡈ*+ᗓ6ᙠKLMNOḄPQRS᪵D.'(ὅ☠2ᡈ*+ᗓ6GTUḄ⚣᳛VW'(ὅḄXYᓄ7.[ᐵ;ᐝ]ᘤ_`abᳮḄdeMRBCḄDEgᵬijA.᝞#ᵬMḄ᯿-mnᜮpqᨵSstuv[twuxᐝḄyQᐸbᳮDᐝḄ{|B.᝞#iD}▾MḄᵨᐝḄNO[X▢C.᝞#D}ᶭᵨḄᑁnḄ᪶_ᐝᡠ[Nᐝ¡DᑭᵨᐝḄᐰ¤x

4D.᝞#¥D¦§Ḅ¨©TURᐝªᙠ«¬®☢ḄḄyᐝ᯿ᑮ¨®¨¦U°Vᐝ±²³m´µᑮ8.Ẇ·ᐝᵯᦔḄ=>º»᝞#ᵬᡠ[⚣᳛vi¼V2Ḅ½¾ᐝᑖ&᯿xᐝᵯ¿▢᩽KÁᨵᐝᵯÂX.ᙠᐝᵯ¿Ḅ½᩽KஹA¬w¤ᔣᵯÄᐝᵯÂÅ▢᩽Kxᩭ®ᔣ□᩽AÈÉP.ᵯÊ⊤GÌᦪÎᵯÄ⊤VḄÌᦪϤᔣÐ0ᵯÄ.ᙠᐝᵯ¿KஹA¬wBᔣᵯÄ,ᐝᵯÂÅ▢᩽Kxᩭᔣ□᩽AÈwPᵯÊ⊤GḄÌᦪᨬᜧ<ḄᵯÊÏ⛳¼ᐝᵯÊ.ᵫᵯÄ⊤V¼ᵯÊ⊤GḄÌᦪÖ×½¾ᐝ᯿xᐝᵯ¿ḄØÙᱯឋÜ᝞#iᡠ.[@ABCḄDA.½¾ᐝḄ⚣᳛RÝB.½¾ᐝḄyQRÝC.½¾ᐝᑖ&᯿xᐝᵯ¿▢᩽KḄÐ0⚣᳛RÝ

5D.½¾ᐝᑖ&᯿xᐝᵯ¿ᐝᵯÂÅ▢᩽K⊤☢⍎¬ḄßàRÝ9.LCá₩ᵯãMäåḄæçèᔣ᝞#ᡠᑣEgA.êæçBᙠÉëᑣᵯìᘤBᙠᐙᵯᵯÊèᔣᵫNᢣᔣMB.êæçBᙠÉëᑣᵯçBᙠtᜧᵯìᘤpïðñᵯC.êæçBᙠtyᑣᵯçBᙠÉòᵯìᘤpïðñᵯD.êæçBᙠtyᑣᵯìᘤBᙠᐙᵯᵯÊèᔣᵫNᢣᔣM10.᝞#ᡠ⊤½ᑡÝ⚣᳛-{óᙠt=0åḄôwõö#M=⊤÷ø⊤ùúû½ᑡḄáüᙳ1cm,P2m/s,ß0.2m,ᑡ@ABCḄD

6A.BஹD½þDáwyþÿ
ᜐᨬᜧB.AஹCC.BஹDᙠḄ2cmD.t=0.025sA⊝2cm11.᝞"ᙽ$%Ḅ&'()(*d,ᵨ,-./0n1-ᙌ34)-ᙌᵯ6R,-ᙌ7ᨵ9ᔣḄ;<)6=>RḄᵯ6.&'(4?)⌕A(*BCmஹDEᵯFᵯ₹C-qḄIJាLᜐ☟N.ᑣ-ᙌ7Ḅ;PQRBḄSᓄUVW;XCḄSᓄ᳛ᜧZᑖ\()A.;PQRBᔣ_F`R)a:RctnqB.;PQRBᔣgF`R)hijC.;PQRBᔣ_F)h=2⍺D.;PQRBᔣgF)h=2lctnq12./mnᨵ%oឋqrAḄst)uvqrḄw⊦y2ᜩ)⊦S{ḄᱥB}ᐹᨵ%oឋ.ᙠᐜst7ᨵ8x10220qrA)st᎔ᐭ$)8ᜩ{stᙳᒴᑖᑮ$Ḅ$7)$71cm3

7Ḅ$)ᒕ2x1090qrA)ᑣ$7Ḅ$CA.1.25xl03m3B.1.25x]06m3C.2.5xl06m3D.5x108m3ஹ2Eᔣ⌱⚪ᜧ⚪ᐳ6⚪⚪3ᑖᐳ18ᑖ.⚪!Ḅ#$⌱⚗&ᨵG$⌱⚗)ᔠ⚪+⌕-ᐰI⌱.Ḅ/3ᑖ⌱.J2ᐰḄ/2ᑖᨵ⌱┯ᡈ2⌱Ḅ/0ᑖ13.u}Ḅ¡¢ᱥ£¤/)¥¦§ᵯ;¨ᩭªᡂX¬®Ḅ.gᑡ°±a²ḄA.³/0ᵯ;¨´oᘤ)}?ᦈᘤB.·/0ᵯ;¨´oᘤ)¸ᵯ;¨?ᦈᘤC.ὃ<_AᵨḄ¬º»¼ᘤᑭᵨ☟ᵯ»¼ḄᳮD.ὃ<_AᵨḄ¬º»¼ᘤX¿´oᵯ;¨ᩭÀ᡾®

814.gᑡÂÃ"ÄÅᑮ}qḄᱥᳮvÆ)ᐸ7°±a²ḄA."ᵬaÉᦣoËÌÍÎ")ÏÐÑÒᙠAஹBஹCஹD7ḄA₯ᐝ»_?ᦈᑮḄaÉᦪᨬÖB."×ØḄÙÚÍÎ")Øn=3ÙÚᔣÛÙÚÜÝ)ᨬÖÙÞß2à⚣᳛ḄᐝC."âᐝᵯᦔQËÌÍÎ")Ïᐝ᯿oå(ÌᵯᘤḄᢣ┐´ßèé)êÌᵯᘤḄ&'ᩚDḄaᵯ₹D."ìᵯíî¿ïð{Ḅño"᪵)ËÌó°ôËᱥÉ>ᐹᨵ¨ឋ15.᝞"%oឋᐗr%Ḅöào-ᙠ;<7Ḅ÷øù)gᑡ°±a²ḄA.o-1ᩭú᪶᜜ḄᵯB.o-3Ḅᵯý®ᵨᨬR)þ}ᵯ;¨C.o-2Ḅîÿ⚞ᨬᵨᐸ

9D.ᙠᱥḄᐝ!Ḅ"!#216.ᨴᳫ&'(ᜧ*ᙠḼ,-./“133e
஻Ḅᓄ4Hᐗ6"7᪶9:Ḅ;⌕=ᧇ.@4ABCDEᨴᳫFGHᨵ100Jᔴ133He
,᝞MNᐵᢈQRᡂTUVᙢᳫXᩭZ[Ḅ\.ᐵ]“^3ᡃe
஻`a᪶bᧇc9:,eᑡghijkḄ"bcA.᪶mnopV3He+qr4He+[HB.2Hᑁ᪶tḄuᙳwx]4Reᑁ᪶tḄuᙳwC.᪶mnyᡂᱥḄwUᜧ]z{mnᱥwḄwD.ᓱe=t᪶`a᪶qy9:U}~\17.ᣵᙠ₝ᙢFᣵᙠᙢF᧕.eᑡ■`i`ᐸᐹᨵN=ᳮḄ"bcA.ᥛᩚiᩚḄeo}ᨵḄB.᧕ᱥ⌕ᵨᩞᧇᒹ¢¥ṹᜮ¨ᢞª«¬C.ᨵᐵᵨ®¯Ḅᔜ±²³´Ḅ⚣᳛·¸ᜧ]20¹ᐻD.ᙠ»F¢ᐰ½¾

1018.᝞¿ᡠÁᙠᐝÂu☢FᨵwᑖÅV3m¥mḄAஹBÇÂᙽÉÊiËᜳḼbNÍc,᪷ᜐ]ÐÑÒ᝱ḄÔwÕÖᵫ]Ø,᪷ÙÚÛḼÜᜐ]☟ÞÒ᝱.ᑣeᑡghjkḄ"bcA7\AM/WW«A.àáÙÚᙠÇÂᙽῃãÕÖäAஹBÇÂᙽḄ³ᜧxåPAèPB=1è1B.àáÙÚᙠÇÂᙽῃãÕÖäAஹBÇÂᙽḄìᜧxåVAèVB=3è1C.àáÙÚᙠÇÂᙽῃãÕÖäAஹBÇÂᙽḄ³\åEkAèEkB=lè3D.àáÙÚᑮÇÂᙽῃãÕÖópiÕÖôAஹBÇÂᙽ/TåWAèWB=1è1öஹ÷ø⚪bᜧ⚪ᐳ3x⚪19⚪6ᑖ20⚪4ᑖ21⚪6ᑖᐳ16ᑖc19.᝞¿1V“ûüýþᘤ஻
ឤ
ᓽẆᳫᙠ⍝ᑖḄᐵ!.

11(1)$%&'⌕)Ḅᩩ+,.A.-.⍝/ᐝ12345B.-.⍝67Ḅᑗ9&'C.ᐭ;ᳫ<=ᳫḄ>&'?@
Aᜧ?CD.ᐭ;ᳫDE&'F⍝ḄCGHIᵫ☟LMN(2)O1%OP,ᳫQRPᙠᙢ☢UḄᚖWᢗY.$Z
ᐜ\ᐭ;ᳫmi]EF-USHI☟LMN
^ᑮᐸᙳbᙢPḄHIP,cQ;dOP.ᯠ
f=ᳫm☟Ig⍝Ḅᑖ
hiᐭ;ᳫmiF-USHI2☟LMN
jᳫm2?
k]Elm.n$o◤⌕qᡂḄ&⌕st,(v⌱⚗Ḅyz).A.ᵨᜩcᳫḄ>miஹm2B.cQRPᙢ☢ḄHC.ᑖ^ᑮmiஹm2?ᙳbᙢPḄHIMஹND.cQ;dOMஹON(3)E$%RḄbP᝞O2ᡠ
Ꮇd%ឤ
ᑣᐭ;ᳫ>mi<=ᳫ>m2.

1220.᝞OᵬCḄGcᐝḄ$I
ᐝᘤRḄGWḄ⁐ᐝᐭG7ᨵ¢£
¤G7ᨵ¥ᐝᱏḄ§ᐝ¨
¥ᐝᱏUR©G᣸@Ḅ«P
O¬%ḄP®⊤«PḄHI.1
°cR¥ᐝᱏU?±«PḄ²³RᐝḄ,µ¢£Ḅ£¶²a,¢£ᑮ¥ᐝᱏḄ²L,¥ᐝᱏU?±«P¶Ḅ²b,ᑣᐝḄᐭ=¸ᑏ⊤º»¼.½¾L=1.0000m,a=0.220mm.᝞O¬ᡠ
¿CᵨᓝᑖÁ᪗ᓱÄc¥ᐝᱏUÅ1«PᑮÅ4«PḄ²,mm.$%ᐝḄᐭ=m¸Æᶇ2Hᨵᦔᦪʼ.2
᝞Ë$ZiᐝᣚᡂÍᐝ
¥ᐝᱏU?±«P¶Ḅ²i¸v“Ïᜧ஻ஹ“Ï஻ஹ"ÑÏ஻¼.21.ÒCÓᙠÔÕÖᵨᓫ᤮clÙÚÛḄ$
ÜÝᨵᔠ〉Ḅ᤮ᳫ
à^ᑮáGᙽᜧã3cm,᜜åÑæᑣḄᜧᳮèᙽ®éᳫ.àḄ$st,êA.ièᙽᵨë9!ì
íPM,ië9ḄU7îgOP¸᝞Oᡠ¼

13B.ᵨðÄcOM¶ë9Ḅ1ô᤮C.ièᙽö÷Gã5஺Ḅúû
ᯠᵫ☟LMND.F᤮ᳫ᤮ᑮᨬþPZ÷ÿ
ᙽᨬ30Ḅ
t,ᵫT=_L_ᕜ301ᑣ!"#$%&'()ᨵ┯,Ḅ-.ᑏ012᪷4ᓫ᤮ᕜ789:;<=>?@Ḅ⊤B8C;E!"ᵨOMḄIJC᤮IKᐭ$M78ᐸO┯,PQRS᪵UVWḄXY,Z[\<=>?@Ḅ]^`%^.ᜧbஹdbᡈfb;E!"ᦋh᤮Iijk]ᐜmnoJT2-1qrsᑭᵨqrḄu᳛ᩭxy<=>?@ᑣᵨOMz{ḄI@JC᤮I[\<=>?@Ḅ]^`%^.ᜧbஹdbᡈfb."0#ஹKL⚪ᜧ⚪ᐳ4⚪22⚪4ᑖ23⚪6ᑖ24⚪8ᑖ25⚪12ᑖᐳ30ᑖ⌕-ᑏ!N⌕ḄᦻPQRஹ

14STUVWLXY'ᑏ!ᨬ[\ᫀḄ2^/ᑖᨵᦪ`KLḄ⚪\ᫀ&NaᑏRᦪ`Vᓫc22.}ᑭᵨᩭᜐḄ.P⚣᳛C1.0xl05Hz,
ᙠ)Ḅqr᝞qᡠ.1xᙠ)Ḅ?2
1}ᑮᡠᵨ
C4s,x}Ḅ¡ᶍ£Ḅ¤.23.¥¦ᐝ"ᩞᧇᑴᡂḄ¬®¯°ZB=30°,ᐸᢚ²᳛C2,³IC566nmḄᓫ⁐ᐝᚖ¬bAC☢²ᔣ¯°᝞qᡠᐭ²C0,x¸1
¹ᓫ⁐ᐝᙠ¯°)ḄI2
ºᑨ¼ᓫ⁐ᐝ½ᔲᙠAB☢$¿Àᐰ²,ÃĦᳮᵫ.24.Æ-ÇȲឋÊËÌ⌕ᩭÎbÏᔠÑḄÒஹᜋẈஹᩞfÓÔᩞᧇ.Õᔾ
×ÊØÙÊËiᐭÚÛ×⊦h

15Èa²{SDz{Þd“àá஻᪵ãäÚzå\ÚzåæçèV¿Úéஹê⊈ìf.Eᨵ☟îḄï᪶222Rn86¿Àa⊦hÈó?@Cvoஹö]CmḄaøù£óö]CMḄÂú᪶┐üPo¹þ]ÿឤ
᪶⊦Ḅᐰᓄa┐᪶Ḅ.1
ᑏ⊦!"2
$%&᪶┐Ḅ'(")*+,ᵨ⚪/01⊤3
3
$56⊦7!/Ḅ89:.)*+,ᵨ⚪/01⊤3
25.12ᑖ
2015᧡•ABCD
᝞Fᡠ3HIJ☢ᑁᨵNOPஹR)ᵯTḄUVJWᐝYAZ[\](ᙳL=0.5m,cde6fR=2஺ḄijᵯTklmḄnoᑁpᙠᚖIs☢ᔣᑁஹuvwx(B=2TḄᒴxu|.}ᐰ~ḄU᪷AZᩚ12☠ᙠ[\cAZᩚ[\][\eᵯTᙳr=lQ.AZᩚ1iᙠu|Ḅcᙠu|ᑁ
AZᩚ2u|cho=O.8mᜐᵫ☟ᐭu|ាᒴ'¡.g£lOm*
.1
AZᩚḄ8m¥ᜧ§2
AZᩚ2u|chi=0.2mᜐᵫ☟ᐭu|©76ª«¬ᒴ'¡.7!/ᵯTR®

16Ḅ¯0.7J,$AZᩚ2ᙠu|/m°Ḅ±(h2²³ᙠ7!/´7AZᩚµ¶☢Ḅᵯ₹q"3
AZᩚ2¸u|ch3ᜐ☟☟AZᩚ1.¹AZᩚ1'(lm/sAZᩚ2ាᐭu|⌕»AZᩚ1AZᩚ2¼½ᒴ'¡ᑣAZᩚ2Ḅ±(hw¿¥ᜧ?3dὃ\ᫀf⚪g᪆ஹ⌱⚪ᜧ⚪ᐳ12⚪⚪3ᑖᐳ36ᑖ⚪!Ḅ#$⌱⚗&'ᨵ$⌱⚗)ᔠ⚪+⌕-⌱.Ḅ/3ᑖ⌱┯ᡈ2⌱Ḅ/0ᑖ1.mᑡÂ3Ãᐹᨵ᪶Å+᪀ḄÇÈÉ
A.ᐝᵯᦔwÇÈB.ᵯḄËC.aᦣÍÇÈD.ÃᐝÎḄË

17ὃÐÑÃḄÒÓÅÔÕ.Ö⚪ÑÃḄÒ+᪀Ö⚪.ᑖ᪆ÑaᦣÍÇÈÉᓲÙÚÛÃ᪶Å+᪀ÜÝḄÇÈÞß.àáÑàÑAஹᐝᵯᦔwâãᐝᐹᨵឋ.ᦑA┯ç.BஹᵯḄËÂ3èÃᨵéᩖ+᪀.ᦑB┯ç.CஹaᦣÍÇÈ/ëᦪaᜧí(îÝãÃ/ïᜧᑖ8ᐰðᵯ₹ñò/ᙠÃ᪶cᓲÙÚóÛèÃᐹᨵ᪶Å+᪀ÜÝ.ᦑCðô.DஹÃᐝÎḄËÉõö÷øÛÞß.ᦑD┯ç.ᦑ⌱ÑC.ÐúÑû⚪ᐵý⌕þÿᵯ
ஹa
ᦣஹᐝᵯᦔஹ
ᐝḄ⌕Ḅ.2.᝞ᡠᨵ!Ḅᓫ⁐ᐝaஹbᚖ%&AB'ᐭῪ*+ABC,,ᐝᙠAB☢/Ḅᐭ0ᑮOCḄ2345ᐝᢚ748&9ḄP0:;ᑨ=>?Ḅ@ACA.ᙠDE9aᐝᐝFᜧ&bᐝᐝFB.ᙠDE9aᐝHIᜧ&bᐝHI

18C.aᐝJK*+ḄLMᜧ&bᐝJK*+ḄLMD.aஹbᐝN!OPQᐭDEKRLaᐝSᐰUḄVWXᜧ&bᐝSᐰUḄVWXὃ0ZᐝḄᢚ[\.]⚪ZᐝḄᢚ]⚪.ᑖ᪆ZJKᐝaḄbᢚRcdeaஹbᐝḄᢚ᳛ᜧgᙠDE9!Ḅ⁐ᐝhiḄFc4!᪷k1denᐝᙠPQ9hiḄFcNmdehiḄLM.᪷ksinCTdeVWXḄᜧg.nnoZnZAஹᙠDE9!Ḅ⁐ᐝhiḄFc4!.ᦑA┯r.Bஹᐝᢚ748&9ḄP0saᐝbᢚᔍuv!JaᐝḄᢚ᳛ᜧ&bᐝḄᢚ᳛ᡠ:aᐝḄ⚣᳛ᜧ&bᐝḄ⚣᪷᳛kᐭᵨsaᐝḄHIg&bᐝHI.ᦑB┯r.CஹaᐝḄᢚ᳛ᜧ&bᐝḄᢚ᪷᳛kkz{aᐝᙠ*+n9hiḄFcg&bᐝḄhiFcᐝᙠ*+9hiḄ|}4ᑣaᐝJK*+ḄLMᜧ&bᐝJK*+ḄLM.ᦑC>?.Dஹ᪷ksinCT,saᐝSᐰUḄVWXg&bᐝSnᐰUḄVWX.ᦑD┯r.ᦑ⌱ZC.

190Zn⚪Ḅẚ{JKᐝaḄbᢚRcdeᢚ᳛ḄᜧgNm:de⚣᳛ஹHIஹᙠPQ9ḄFcஹVWXᜧgᐵ.3.᝞ᡠaaᑖᵬஹ
Ḅ.ᑣACA.Lᵬ
Ḅ|}d
Ḅ|}ᜧB.Lᵬஹ
Ḅᔣ4!C.2ᑁᵬஹ
Ḅ¡Fcᙳ>£D.¤2¥ᵬḄFc¦ᑮᐸᨬᜧḄ¡Fc¦ᑮᐸᨬᜧὃ0ZḄ.]⚪Z]⚪.ᑖ᪆Zᵫª%«¬|}Ḅᜧgᔣ.ᵫᑗaᔣᑖ᪆Fcᔣ.ᵫḄᱯ¯a°-²ᑖ᪆¡Fc.mnoZnZAஹU᧜´
Ḅ|}µLMḄᐵsᵬ
Ḅ|}ᨵLd
Ḅ|}ᜧᨵLd
Ḅ|}gᦑA┯r.

20Bஹ᪷kᑗaḄ¶᳛&FcsLᵬஹ
Ḅᔣ4UᦑB┯r.Cஹᵫa°-·ᑖ᪆s2ᑁ
Ḅ¡Fc>£IDᵬ
Ḅ¡Fc¸£ᦑC┯r.Dஹ¤2¥ᵬḄ|}&JK¹⊝|»Fc¦ᑮᐸᨬᜧḄ|}¦ᑮᨬᜧ¡Fc¦ᑮᐸᨬᜧᦑD>?.ᦑ⌱ZD.0Z⚪@ᓫḄ¬⚪᪷k:%«¬¼ஹᕜ¾ஹFcஹ¡FcḄᔣ¿ÀÁḄÂᓄÄÅ.⌕ÆÇḄᱯ¯a°-U.4.᝞OᑡᔣÉhiḄÊHᙠËLḄHÌᑣ;ᑡÍÎ9>?Ḅ@AA.Q0bÏLᔣÉB.Q0bÏLᔣyÐ>ᔣC.ÏLQ0adQ0bḄFcᜧD.Q0adQ0bḄ¼ᜧὃ0ZÊHḄÑHIஹ⚣᳛HFḄᐵ.]⚪ZÒµHÒ]⚪.

21ᑖ᪆ZÊHhiLÓᨵªÔÕᜫᔜQ0Ḅ¼4!.᪷kHḄhiᔣᑨ=Q0Ḅᔣ.᪷kLMµᕜ¾ḄᐵᔜQ0MḄᐵᑨ=F᳛ᐵ.ËLᑖ᪆Q0Ḅ|»ᑨ=ᐸFcÂᓄ.noZnZABஹQ0bÏL|&¹⊝|»ØÏFcᨬᜧ,᪷kHᔣÉhiᔣsQ0bᔣyÐ>ᔣᦑA┯rB>?ÑCஹᵫsQ0adQ0bḄFcgᦑC┯rÑDஹᡠᨵQ0Ḅ¼ᙳ@4!ᦑD┯rÑᦑ⌱ZB.0ZH@OÚᳮÜḄÝÞᙠhiKR9ÓᨵªÔÕᜫPQ9ᔜQ0Ḅ¼ஹᕜ¾µHß4!.5.àáâãäᨬåᜧᾯçèéiKᔧëìᵨ“îïð஻◫óôᴻöḄ⊤øù⊤øúû´üýþÿḄ
.ᨵᐵᕒᙠ.ᵨᢣᴻᑮᾪḄ"#$%&"#Ḅ⚣᳛)500Hz,*&ᴻ+ᙠ,ᜧ.᳛Ḅ"/0"ᘤ234ᕒ567᦮ᐸ0:Ḅ"/;<ᴻ=ᣵ.?ᑡABCDEḄFGIA.34ᕒ⌕K"/0Lᘤ0:Ḅ"/⚣᳛7ᑮᨬᜧB.34ᕒ⌕K"/0LᘤN:Ḅ.᳛7ᑮᨬᜧ

22C.34ᕒOPQRK"/0LᘤN:Ḅ.᳛S0:"/Ḅ⚣᳛7ᑮᨬᜧD.34ᕒOP*"/0Lᘤ0:Ḅ"/⚣᳛7ᑮT)500Hz,U〉WXᜧᐸN:.᳛ὃZ[\Lᐳ^Ḅᩩ`aᐸbᵨ.ᑖ᪆[ᵨ"/*⏀◫=Fᑭᵨ⏀0Lᐳ^hijᱥl0Lᐳ^Ḅᩩ`FmnoḄ⚣᳛pqᱥlḄrᨵ⚣᳛.st[s[ᵫ⚪ᵨᢣ⏀$%&"#Ḅ⚣᳛)500Hz,wF⏀Ḅrᨵ⚣᳛.Wᱥl0Lᐳ^Rᱥl^nḄ^xᨬᜧyz;⌼ᡂᱥlsl*&⏀+ᙠ}ᜧ.᳛Ḅ"/0Lᘤ~34ᕒ567᦮ᐸ0:Ḅ"/*⏀◫=Fᐳ^hij0Lᐳ^Ḅᩩ`FmnoḄ⚣᳛pqᱥlḄrᨵ⚣᳛j⏀Ḅrᨵ⚣᳛)500Hz,ᦑ34ᕒ⌕*"/0Lᘤ0:Ḅ"/⚣᳛7ᑮ500Hz,<⏀\Lᐳ^j;*⏀◫=.ᦑDDE.ᦑ⌱[D.Z[ᱥᳮᡠ᧜Ḅᱥᳮ;DEs⚪.ᦑ⌕56ᱥᳮhiᢕᱥᳮ`Ḅ.

236.WindowsMediaPlayerFWindowsḄ⚣+`¡"#Ḅ/¢.£¤)¥"/Ḅ¦§¨ᦔbª᝞?¬ᐜᙠ¯°±²ᱯᑴµ¶ᗓ¸ᯠºᙠ»¼ὅ¾ᙶḄÀÁ±²Ã#ÄᜓWÀÁÆnRÃ#Äᜓ*ᗓ¸0:ḄrÇ⚣᳛Ḅµ¶ÈÉÃ?ÊᵨWindowsMediaPlayer*µ¶ÈÉ¡)/¢.ËaஹbஹcᑖÍ)»¼ὅÎϵ¶ᗓ¸ஹе¶ᗓ¸ÑÒ☟Ôஹ☠Öµ¶ᗓ¸RÃ#Äᜓ×ᦈᑮḄµ¶"Ù᦮Ḅ/¢Ë᪵.ᐵq?ᑡABDEḄFGIA.»¼ὅ☠Öµ¶ᗓ¸RÃ#Äᜓ×ᦈᑮḄ"/Ḅ⚣᳛Û"Ü⚣᳛ÝB.»¼ὅÎϵ¶ᗓ¸RÃ#Äᜓ×ᦈᑮḄ"/Ḅ⚣᳛Û"Ü⚣᳛ÝC.»¼ὅ☠ÖᡈÎϵ¶ᗓ¸R"/ᙠßàCáḄâãä᪵D.»¼ὅ☠ÖᡈÎϵ¶ᗓ¸R"ÜåḄ⚣᳛滼ὅḄÆn0LçᓄὃZ[¦§¨ᦔbé"/.

24ᑖ᪆[W"ÜÏ»$ὅjêR"/Ḅ/ëXì#7ç%íîW"Ü×Ö»$ὅR"/Ḅ/ëï£#7wçÝ.#7ḄçᓄQ"Üл$ὅḄÑÒâãS"âḄÛðᨵᐵ.&Ûðñᜧᦋçwñ℉ºKô)“¦§¨ᦔb஻.st[s[AஹW»¼ὅ☠Öµ¶ᗓ¸RᓫøRᑁ×úᑮḄ^nḄûᦪXìᡠÃ#Äᜓ×ᦈᑮḄ"/Ḅ⚣᳛Û"Ü⚣᳛Ý.ᦑADEéB┯þéBஹ»¼ὅÎϵ¶ᗓ¸RᓫøRᑁ×úᑮḄ^nḄûᦪïÿ
ᜓᦈᑮḄḄ⚣᳛⚣᳛.ᦑB┯CஹᙠḄᵫḄᱯឋ"#Ḅ$%&ὅḄ(ᐵ.ᦑC┯Dஹ*+Ḅ⚣᳛ᵫ*+"#Ḅ,-.%&ὅḄ/0123ᓄ.ᦑD┯.ᦑ⌱6A786*⚪ὃ;<=>?ᦔAB⌕DE“GH⊤J☠LM⊤JNO஻ḄQRSTU⌕V⍝XḄ⚣᳛ஹᙠḄY$Xᔲ[0\]%&ὅᔲ[0(ᐵ^Ạ⚪.

257.\aᐵbᐝdᘤfghiᳮḄkl,mnḄopqrᑁtA.᝞vᵬḄ᯿yz{ᜮ}~ᨵ\ᐝḄᐸiᳮᐝḄB.᝞vr▾Ḅ(Aᵨ<ᐝḄ\T2▢C.᝞vᶭ;ᵨḄᑁ{Ḅ᪶¡¢fᐝ£¤¥¦ᡠ\¨©ᐝª«¬ᑭᵨᐝḄᐰ¯D.᝞vt°±²Ḅ³´T*+,1ᐝµᙠ¶·¸²T¹☢Ḅ»²1¼Ḅᐝ᯿ᑮ³¹³°+½-1ᐝ¾¿»²ÀzÁÂᑮὃ76ᐝḄᐰ¯.ᑖ᪆6<ÅÆÇᨬÉÊËḄÌᐝↈḄÎÉÌᐝᙠÏnÐÑↈÒ¹⊤☢Ḅ¯ᐝyÓ4ÔÕÖ12<(AᵨᐝḄ×Øᐝ£¤¥Ù$°±²Ḅ³ᑭᵨᐝḄᐰ¯iᳮѾᓽÛÜÝ.ÝÞ6Ý6AஹvᵬḄ᯿yz{ᜮ}~ᨵ\ᐝḄᐸiᳮᐝḄↈᦑAmn

26Bஹ(Aᵨ<ᐝḄ\T2▢ᦑBmnCஹᐝ£¤¥Ùᑁ〈vØᑭᵨᐝḄᐰ¯iᳮᦑCmnDஹ¶·¸°±²Tѹ☢àᩭḄ»²1¼Ḅᐝ᯿ᑮ°±²³¹-ᨵâḄᐝã1äå¾æçÀzḄÁÂÖᑭᵨ<ᐰ¯è{ḄiᳮᦑD┯*⚪⌱é,mnḄᦑ⌱6D.786ὃ;ᐝḄஹᢚ$ᐰ¯Ḅiᳮ]ᐸ12ᩩfÁÂḄiᳮᳮÝ⁐ᦣ$ᢚ⁐ᦣḄ,S.8.ẆïᐝᵯᦔAḄñòóô᝞vᵬᡠJ\⚣᳛ÉviõV2Ḅö÷ᐝᑖø᯿ᐝᵯù▢᩽KTYᨵᐝᵯû2.ᙠᐝᵯùḄö᩽KஹA¦·¯ᔣᵯýTᐝᵯûÑ▢᩽K1¼ᩭ¹ᔣ□᩽Aÿ
.ᵯ⊤Gᦪᵯ⊤VḄᦪᔣᵯ.ᙠᐝᵯKஹAᔣᵯ,ᐝᵯ▢᩽K#$%ᩭᔣ□᩽A(
ᵯ⊤GḄᦪᨬᜧ+Ḅᵯ⛳-ᐝᵯ.ᵫᵯ⊤V-ᵯ⊤GḄᦪ/0%12ᐝ᯿$ᐝᵯḄ45ᱯឋ89᝞;<ᡠ>.?@ABCḄD

27sA.12ᐝḄ⚣᳛HIB.12ᐝḄJKHIC.12ᐝᑖM᯿$ᐝᵯ▢᩽KḄ⚣᳛HID.12ᐝᑖM᯿$ᐝᵯᐝᵯ▢᩽K⊤☢⍎%ḄPQHIὃSTᐝᵯᦔV.W⚪TᐝᵯᦔVW⚪.ᑖ᪆TᔣᵯU-⚣᳛Z[#\ᐝᵯᦔV]\Ḅᐝᵯᦪ^ᐝJᡂ`ᑣᓫcᑮe▢᩽AḄᐝᵯᦪ^ᐝJfᡂ`ᵯUo^⚣᳛vD9ឋᐵhHD`ᐵhᐝJI^⚣᳛vZ[ᐝᵯiiᔣᵯḄjᜧkl.mnTmTAஹᵫ;

28Bஹᵫ;ᑣA.ᙠᑣᵯᘤᙠᐙᵯᵯsᔣᵫNᢣᔣMB.ᙠᑣᵯ¡ᙠjᜧᵯᘤ¢£¤¥ᵯC.ᙠjJᑣᵯ¡ᙠ¦ᵯᘤ¢£¤¥ᵯ

29D.ᙠjJᑣᵯᘤᙠᐙᵯᵯsᔣᵫNᢣᔣMὃSTᵯ§Ḅ]\.ᑖ᪆T;LC₩ᵯᵯᘤᐙᵯ¨^9ᙌpªᵯᘤ⌕¬ᵯ9ᙌᵯᨵ®¯°ᵨ²³Q´´¦kB᠒᠒jᡠ?ᵯ¡¶ᓄ¡.mnTmTAஹᙠᵫ¸¹[º/³9ᙌ¢»᩽ᵯᵫMᑮNzᦑA┯yzBஹᙠzᑣ¡ᙠlzᵯ¡ᙠjᜧzᵫAḄᑖ᪆/o¢£¤ᵯzᦑB┯yzCஹᙠjJzᵯᘤᙠ¬ᵯᵯ¡ᙠlzᵫ¼½[ᑣ/oᵯsᔣᵫMᑮNzᦑ¢᩽£¤¥ᵯzᦑCCzD┯yzᦑ⌱TCST¾¿9ᙌÀÁÂᓄ]\ÃVᵯÄpÅᵯÆÇḼᵯᘤ.᪷rsᔣVᵨ5É[ᑣᑨË%ᵯᵯsᔣஹ᪷rᵯsᔣᑨË%ᵯᘤ¤ᵯ}~DCm⚪Ḅᐵ.10.᝞;ᡠ>⊤>1ᑡI⚣᳛pÍΧᙠt=0ḄÏ}~;Ð9⊤>§ÑÒ9⊤>§ÓÔo1ᑡ§ḄÕ

30ᙳ1cm,§
2m/s,§P0.2m,@ᑡABCḄDA.BஹD1SDJS×cØÙÚᜐÅᨬᜧB.AஹCSDSC.BஹD1SᙠÜḄÝÞßKà2cmD.á0.025sASâã⊝cå2cmὃST§ḄÏ.ᑖ᪆T⚣᳛pIḄ1ᑡΧḄÏT§Ñ^§Ñஹ/§Ó^§Óp⍗DJḄz§Ñ^§Óp⍗DḄ.çSḄcØ{Å1èéêcØḄëÁ-.mnTmTAஹBSD§Ñ^§ÑDSD§Ó^§ÓÏSᓽJSᑣESᙠJSª9¢fDJSícØᜧl.ᦑA┯y.BஹSA-SCᙳ§Ñ^§ÓÏSᦑBCzCஹDSᙠܧÑ^§ÑÏJîïã⊝cåḄcØ2cm,BSᙠܧÓ^§ÓÏJ,îïã⊝cåḄcØ-2cm,ᑣDஹB1SᙠÜḄÝÞßKà4cmzᦑC┯y.

31Dஹ§òóḄᕜõT=2=ùù=0.1s,ýþ¿t=0.025sᓽv22ᕜA⍗ᡠ⊝Ḅ4ᜧ!0.ᦑD┯%.ᦑ⌱'B.)'Ḅ*+,-./0ᑣ234567ᑣ+34568ᑣ9:;ᑡ=>?᡾.A᝞2CḄ⍗DᜐF⊝Ḅ3GḄHIJ2⍗DᜐḄK.11.᝞M;ᙽOPḄQRS;STUd,ᵨYZ[n]Zᙌ_ZᙌᵯaR,ZᙌcᨵefgᔣḄijaklRḄᵯaQRS_m⌕o;STp/mஹstᵯ:ᵯ₹/-qḄxyា{ᜐ|☟~.ᑣZᙌcḄiBḄᓄ56i/Ḅᓄ᳛ᜧ!ᑖA.iBefᔣ:,জHdmgAtnqB.iBefᔣ:,9HdmgtnqC.iBefᔣ:9,c=2d1ngAtnqD.iBefᔣ:9,9=2+gAtnq

32ὃ'0ᵯiJsᵯᙠᔠjcḄ4.⚪'ᵯiᵯ¢£ᔠ.ᑖ᪆'ᵯ₹/-qḄxyា{☟~|QRST¥ᑮḄᵯj§¨§⊝ᵫ⊝ᩩ«¬®QRSTḄᵯ¯.Dᵯ¯°|R;±Ḅᵯ¯.᪷³0ᵯi´µ£ᔠ®i/Ḅᓄ᳛ᵫ¶·¸iBḄᓄ56.¹º'¹'ᵫ⚪ᵯ₹/-qḄxyា{☟~|QRST¥ᑮḄᵯj§¨§⊝ᵫ⊝ᩩ«»¼xy¥ᑮḄᵯj§efᔣᑣQRSSs½ᵯSstᵯ.ACஹ¾iBefᔣB½ᙠ᪷³¶·»¼Zᙌc¿ÀḄᵯ4Át½QRSSstᵯSs½ᵯxyÂ⊝ᑣiBefᔣ:B½ᙠ9xy>ÂÃᢝ⊝.᪷³0ᵯi»'E=nÅ…জQRSTḄᵯ¯'U=1E...@⌕oxy⊝ᑣᨵ'qÇmg…ঞdὶÉজঝঞ»'Ì2᯿.ᦑA┯%C┯%.tnq

33BDஹ7ᳮ¬¼iBefᔣ:½>ÂÃᢝ☟~¾iBefᔣ:½9:ᨵᓩH2Ð,xyÂÃᢝ☟~.ᦑB┯%D½¸.ᦑ⌱'D.)'Ñ⚪ᵯiᵯ¢ஹᵯjஹ§Ò°¼ÓḄÔᔠᵨ.F|ᵯiÕ⚪⌕¶·ᑨ×ᵯ4Áஹ0ẆÙᵯ4Áᜧ!ÚᵨḄÛ¢.12.[ÜÝᨵPÞឋ7àAḄáâã¼C7àḄÇ⊦2ᜩ⊦æḄᱥp>ᐹᨵPÞឋ.éᙠᐜë»Cáâcᨵì8x10227àAíîïCáâ᎔ᐭOòó8ᜩæáâᙳᒴᑖöᑮOòḄOc÷øOòcù®1cm3ḄOë»ᒕûì2x1097àAíᑣCOòcéüḄO/ìýþA.1.25xl03m3B.1.25xl06m3C.2.5xl06m3D.5x108m3ὃ'í᪶⊦
⊦ஹ⊦
.⚪⊦
⊦⚪.ᑖ᪆᪷⊦ᑭᵨḄḄ!.

34#$#%8ᜩ'()ᙳᒴᑖ,ᑮḄ./01.23Icn?Ḅ45ᒕ782x1099:;,@AB:;<Ḅ⊦C2ᜩᡠE8ᜩFlcm3Ḅ.ᨵ832x1099:;8ᜩFB.HIḄ!.ᨵ88x10229:;99ᡠEB.HIḄ!8CV=3X1^.,x106m3=2.5xl06m3,32X1Q9ᦑ⌱C.LMN⚪OPQ4!!Ḅ◀QὃT⊦ḄAU᜜W⌕A⍝᝞[\Ḅ!⊦
]ᦪ_ᔠ.ஹ2Eᔣ⌱⚪ᜧ⚪ᐳ6⚪⚪3ᑖᐳ18ᑖ.⚪!Ḅ#$⌱⚗&ᨵG$⌱⚗)ᔠ⚪+⌕-ᐰI⌱.Ḅ/3ᑖ⌱.J2ᐰḄ/2ᑖᨵ⌱┯ᡈ2⌱Ḅ/0ᑖ13.ab@cdHefghijḄklᱥnopqdrsᵯuvᩭxᡂz{|}Ḅ.~ᑡḄdA.abdp9ᵯuvᘤgdᦈᘤB.abdp9ᵯuvᘤdᵯuvᦈᘤC.ὃᵨḄab{ᘤdᑭᵨ☟ᵯḄ=ᳮD.ὃᵨḄab{ᘤdzᵯuvᩭ᡾ab|}

35ὃLᵯuvḄ.ᑖ᪆{ᑮᵯuvḄᑴ¡{1ᵯuv~~ᩭḄ#¡abdp9ᵯuvᘤdᵯuvᦈᘤ.#$#AஹabhEᵯuv¢hEᦈᵯuv,ᡠEabdp9ᵯuvᘤdᵯuvᦈᘤ.ᦑA┯¤B.CஹὃᵨḄab{ᘤdzᵯuvᩭ᡾ab|}q¥¦ᑮ☟ᵯḄ}ᵨ¡ᦑC┯¤¡D;ᦑ⌱BD.LM#¨N⚪ḄᐵªA⍝ᑴ#Ḅ«¬abḄ=ᳮ=ᳮ.14.~ᑡ®¯°±ᑮg:ḄᱥᳮAUᐸ.ḄdA.°ᵬda´>ᦣ¶·P¸°¹º»¼ᙠAஹBஹCஹD.ḄA;¾0₯ᐝᦈᑮḄa´>ᦪᨬÂB.°ÃdÄ=>ḄÅÆP¸°Ä=>1n=3ÅÆᔣÈÅÆÉÊᨬÂÅ2Ë⚣᳛Ḅᐝ>

36C.°Îdᐝᵯᦔж·P¸°¹ᐝ᯿ÒÓ0·ᵯᘤḄᢣ┐Ö×Ø0·ᵯᘤḄÙÚᩚÜḄdᵯ₹D.°Þdᵯ>ßàáâ'Ḅã°᪵B¶·Hå¶ᱥ´>¢ᐹᨵvçឋὃLÄ=>ḄÅÆÉÊ¡ᐝᵯᦔÐ.ᑖ᪆(1)ëìë3pßíîïÙâðᵨº»¼F₯ᐝñòóíḄ;¾Q#a´>ᦣ¶·Ḅ¶·Håᓽh#$¡(2)᪷ᦪõöᔠ,23p÷Ä=>ᜐù!>ᦪn=3nḄú᝱hÅ3Ḅᐝüíᩩᦪ.¡(3)¹ᐝ>Ḅ⚣᳛ᜧù᩽▲⚣᳛ᐝᵯᦔᵯ(4)ᱯᨵḄឋAஹᵬa"#ᦣ%&'()*+,ᙠAஹBஹCஹD.ḄA/0₯ᐝ234ᦈᑮḄa"#ᦪᨬ9.ᦑA<Bஹ=>?#Ḅ@A'(᪷CD=3EFG>?#ᔣI@AJKḄLM.@N3OPQ⚣᳛Ḅᐝ#.ᦑB┯S

37Cஹ)ᐝ᯿VᜫXᵯ#ᵯᡠZ[\]^Ḅ&ᵯᘤḄᢣ┐bcd&ᵯᘤḄᩚḄᵯ₹.ᦑC<Dஹgᵯ#hiLjklḄ᪵ᵫoᱯᨵḄឋᡠZp%&qrst%ᱥ"#vᐹᨵxឋ.ᦑD<ᦑ⌱ACD.z{ᵫa"#Ḅᦣ%&|E?#ᑁ~Ḅ᪀.ᨵḄ᪶ᐰ~ᵯ₹ᐰ~Ḅ.ᙠ☢᜜☢ᵫᵯ#᪶cE⍝a"#Ḅᦣ%&Ḅ⚪ḄᐵE⍝ᐝᵯᦔᨵᐝᵯ#.ᳮᐝᵯᦔḄNᳮᐝᵯᦔNḄᩩ¢Zᐝᵯ£ᜧḄ¥¦§¨@ᙠᐹ©ª⚪.<ᵨ.15.᝞®ឋᐗ§®Ḅ°O±ᙠ²³.Ḅ´xµ¶·ᑡs¹<Ḅº»A.±1ᩭo?#᪶᜜Ḅᵯ#B.±3Ḅᵯ½¾ᵨᨬ¿ÀPᵯ²

38C.±2ḄiÁ⚞ᨬ¿ÃÄ~Å|ᵨᐸÇNÈÉÊD.ᙠËÌͳÎÏÐÑᱥÈḄÒÎÍᐝÓḄ±2ὃzX±ஹa±ஹ0±ஹv±ᐸᱯឋ.ᑖ᪆᪷C×Ø¥ᑣt<ᔜ±Ḅឋᑣ|Zt<ᔜÛO±Ü᪷CᐸÝ⌕ឋßÐᑖ᪆t<ᔜO±Ḅ¾ᵨ.Aஹᵫ×Ø¥ᑣᵫr|E±1àᵯ±2Pᵯ±3ᵯᑣ᪷C±Ḅឋ|E3a"#2v±1ᵯ#ᐸ.Y±iÁ@áᨬ¿a±ᵯ½¾ᵨᨬ¿ᦑA┯SBC<DஹᙠËÌͳÎÏÐÑᱥÈḄÒÎÍᐝÓḄX±;Y±ᵫã¿ḄäP@ᵨᙠͳᩭÎÏÐÑᦑD┯S;ᦑ⌱BC.z{⚪ὃϱឋZ×Ø¥ᑣḄᵨ⌕t<°O±.a±ᵯ½¾ᵨᨬ¿iÁ¾ᵨᨬåV±iÁ@áᨬ¿ᵯ½¾ᵨᨬå.16.ᨴᳫèéᜧêᙠḼOìí“>3(3e)஻ḄᓄñHᐗ§ò᪶óôḄõ⌕?ᧇ.÷ñøùúûüᨴᳫ3ýþ

39ᨵ100ÿᔴ
3He
,᝞ᐵᢈᡂᙢᳫᩭḄ.ᐵ"3e
஻"#᪶%&',)ᑡ+,-./Ḅ0%A.᪶12343He+5He+B.2Hᑁ᪶7Ḅ8ᙳ:;<4Heᑁ᪶7Ḅ8ᙳ:;C.᪶12=ᡂᱥḄ:;ᜧ@A12ᱥ:Ḅ:;D.BeC7᪶"#᪶=&'DE;ὃGH'12I&'12J᰿LMᚆ:34.O⚪⊦'IR⊦SO⚪.ᑖ᪆VA⌱⚗Yᨵ[\]ᨵ^Ḅ⌶`.ᵫ:;-bḄ᪶Ḅcdᔠᨬᜧᦑhi᪶H'jk:;-bḄ᪶ᡈhm᪶&'nh᪶opqrDE;ᦑsk=ᡂᱥḄ᪶7Ḅdᔠᜧsk12ᱥḄ᪶7Ḅdᔠ.ᵫm᪶Ḅ&'tD;᪷v᰿LMᚆ:34w=ᡂᱥḄ:;<12ᱥḄ:;.xyxAஹ{⌱⚗-Ḅ᪶1234|0}I~Ḅ᪶&'Ḅ34ᙠ=ᡂI~ḄtDᜧ;Ḅ;.ᦑA./.Bஹᵫ:;2Hᑁ᪶7Ḅ8ᙳ:;ᜧ^Heᑁ᪶7Ḅ8ᙳ:;JᦑB┯J

40Cஹᵫ᪶12Ḅ4-tDᜧ;Ḅ;᪷v᰿LMᚆ:34E=AmC2,w=ᡂᱥḄ:;<12ᱥḄ:;.ᦑC┯.Dஹᵫ:;-bḄ᪶Ḅcdᔠᨬᜧᦑhi᪶H'jk:;-bḄ᪶ᡈhm᪶&'nh᪶opqrDE;.ᦑD./.ᦑ⌱AஹD.G⚪⌕ὃ:;-bḄ᪶Ḅcdᔠᨬᜧᦑhi᪶H'jk:;-bḄ᪶ᡈhm᪶&'nh᪶opqrDE;ᳮxs⚪|ᑓxᦑ⌕VᭆAᳮx.17.ᣵᙠ₝ᙢcᣵᙠ¡ᙢ¢£᧕¥.)ᑡ■§"¨q-"ᐸᐹᨵCᳮḄ0%A.ᥛᩚ®c¯-°ᩚḄ)3Dᨵ±²Ḅ³´µB.᧕¥ᱥ¶·¸⌕ᵨº»ᩞᧇᒹ¿IṹᜮÄᢞÆÇÈC.ᨵᐵÉʨqᵨËÌÍÎḄᔜÐÑÒÓÔḄ⚣᳛×Øᜧ20ÙᐻD.ᙠÛÜÝ¿ÝᐰßàὃGÒ;qᳮ.

41O⚪Ò;qᳮ2ᵨO⚪.ᑖ᪆á/ᡠãEäåḄCᳮæᑖ^Vᔜ⚗çèᑖ᪆éECᳮḄ⌱⚗ᓽ.xyxᣵᙠ₝ᙢcᣵᙠ¡ᙢ¢£᧕¥0L₝ᙢVëᑮíîÎᵨJᑣᨵAஹᥛᩚ®c¯-°ᩚḄ)3Dᨵ±²Ḅ³´µëᑮíîÎᵨJᦑA./JBஹ᧕¥ᱥ¶·¸⌕ᵨº»ᩞᧇᒹ¿IṹᜮÄᢞÆÇÈᙳëᑮíîÎᵨJᦑB./JCஹᨵᐵÉʨqᵨËÌÍÎḄᔜÐÑÒÓÔḄ⚣᳛×Øᜧ20ÙᐻJ]ᨵᵨᑮíîÎᵨJᦑC┯JDஹÛÜÝ¿Ýᐰßàðᙠñᦑ-ëíîÎᵨJᦑD./Jᦑ⌱ABD.G⚪2ᵨÒ;qᳮᑖ᪆=òäå⌕ᢕ\bḄᩩõçèᑖ᪆.öEᔜ÷äåḄᐳG.18.᝞ùᡠúᙠᐝü8☢ᨵ:;ᑖ^3mImḄAஹBjüᙽÿ
ᜳḼ᪷ᜐ᝱Ḅᵫ᪷Ḽᜐ☟᝱.ᑣ"ᑡ$%&'Ḅ(AH

42A.+,ᙠ./ᙽῃ23AஹB./ᙽḄ67ᜧ9:;PA=PB=1=1B.+,ᙠ./ᙽῃ23AஹB./ᙽḄ@Aᜧ9:;VA=VB=3=1C.+,ᙠ./ᙽῃ23AஹB./ᙽḄ6E:;EkA=EkB=l=3D.+,ᑮ./ᙽῃ2KL
MAஹB./ᙽNO:;WA=WB=1=1ὃR=67SឤUV.W⚪=67UᳮZᵨW⚪.ᑖ᪆=ᐜ᪷_67SឤSឤ`aῃ23./ᙽḄ@A:;᪷_6Eஹ67Ḅ⊤cd`a6Ee67:;᪷_M./ᙽNOf/ᙽ6EḄgᓄ7`aM./ᙽNO:;ij=i=Aஹkl67Sឤmᔣop&qᔣᙠ./ᙽrsῃ2tᵫ67SឤUVu=PA-PB=O,ᑣ=PA=PB=1=1,ᦑA&'zBஹkl67Sឤmᔣop&qᔣᵫ67SឤUVu=3mvA-mvB=O,iu=VA=VB=1=3,ᦑB┯~zCஹ./ᙽḄ6E:;=EkA=EkB=4%ᦑC&'z123

43DஹM./ᙽNO:;f./ᙽ6E:;MAஹB./ᙽNO:;=WA=WB=EkA=EkB=l=3,ᦑD┯~.ᦑ⌱=AC.R=⚪(67UᳮḄZᵨ⌕;ᱥᳮ7:Ḅ;ᐵk⌕7ᵨ7⊤aᩭ;.ஹ⚪(ᜧ⚪ᐳ39⚪19⚪6ᑖ20⚪4ᑖ21⚪6ᑖᐳ16ᑖ)19.᝞1p“¢£¤¥ᘤ஻¨©m¥ª67SឤUVᓽẆ.9ᳫᙠ¯⍝±²³ᑖ¢£´3Ḅ67ᐵk.12(1)¤¥
µ¶⌕`Ḅᩩ¸(BD.A.¹º¯⍝»7ᐝ/m½¾~¿B.¹º¯⍝ÀÁḄᑗõ¶±²C.ᐭÅᳫÆ¢ᳫḄ7µ¶fÇᜧ9ÈD.ᐭÅᳫÉʵ¶Ë¯⍝ḄÈÌÍᵫ☟ÎÏ(2)1
OR(9ᳫÐaRᙠᙢ☢ÓḄᚖᢗÖ.¤¥tᐜ×ᐭÅᳫmiÙÊ˹¯ÓSÌÍ☟ÎÏÛᑮᐸ²ᙳÞᙢRḄÌÍP,ß7²ÐÅLOP.ᯠ3¢9ᳫ

44m2☟ͯ⍝Ḅ±²³ᑖáᐭÅᳫmi˹¯ÓSÌÍ☟ÎÏâ9ᳫm2¢ãÙÊäå.¤¥æ◤⌕èᡂḄµ⌕êë(ACD⌱⚗´Ḅíî.A.ᵨᜩ²ß7.9ᳫḄ7miஹm2B.ß7ÐaRðᙢ☢ḄñAHC.ᑖòÛᑮmiஹm2¢3²ᙳÞᙢRḄÌÍMஹND.ß7²ÐÅLOMஹON3
óʤ¥
uaḄÞRôõ᝞2ᡠᎷø¢£KL
67SឤᑣᐭÅ9ᳫ7miÆ¢9ᳫ7m2:;p41.ὃR=¥ª67SឤUV.W⚪=¤¥⚪.ᑖ᪆=¥ª¢£
Ḅ67SឤᐭÅᳫ7Zᜧ¢ᳫḄ7z¥ª67SឤUV¤¥
7©ßùt@Aú.ûüýᵨþÞᙢñAgḄôõ"±²ÅLᩭÿ᧜
ḄᜧᡠᳫḄ
ᩭ.ᳫ◤⌕ᳫ⌕!.ᨬ#$%&'
()ᩭ*+,-ᔲ/ឤ1231341
Aஹ6⌕ᳫ789⍝;Ḅ
<=ᓽ$◤⌕⌕!9⍝ᐝ@ᦑA┯CD

45BஹFGH+ᳫI
J,KLMNOP
DᦑBQRDCஹF■TᐭᳫVWᐭᳫḄ&XᜧYZ[ᳫḄ&,ᦑC┯CDDஹFH+ᳫ]^
Ḅᙳ<`DᦑXᐭᳫ]^a`bcᵫ☟TDᦑDQRDᦑ⌱3BD.(2)g*;ᐜiᐭᳫmij^aK9kSlm☟T,nᑮᐸ
ᙳqᙢcḄlmP,
OP.ᯠ#tZ[ᳫm2☟mY9⍝Ḅ
uᑖwxᐭᳫmiaK9kSlm☟T'ᳫm2<[yj^z{.
ᙳqcḄlmnᑮ
J,Ḅ
l|}~CD-OPḄC⌕ᙠD.Yᵨᜩ
&ᐜ#ᙳ$.ᡠ2ᫀ-ACDD(3)ᵫ2ᡠ$OP=25.5cm,OM=15.5cm,ON=40.0cm᝞ᳫ[,/ឤᑣ3miOP=miOM+iwON,ᐭᦪ!3mi3m2=431Dᦑ2ᫀF3(1)BDD(2)ACDD(3)431.c3⚪ὃ*+,/ឤ⌕ᙠ<`¡
ᩭyᑭᵨ,£/ឤᩭ1&ᐵ¥.

4620.᝞ᵬF©`ª«Ḅb¬ᐝ®¯Ḅg*°m±ᐝᘤ³Ḅb´µ¶·Ḅ¸⁐ᐝºᐭbN°ᨵ¼½¾bN°ᨵ¿ᐝᱏḄÁᐝ¿ᐝᱏkÃb᣸=ÅḄÆcÇḄÈc⊤ÆcḄlm.[T7------------------------------jτ----------.0I2“”11NÊᐝᱏL"%ᐝ▬U4GFf.•*pnJ11tfrjÍU050ÎÇ41Ð%¿ᐝᱏk<ÑÆcḄÅ7$ÒᐝḄ®¯,Ó¼½Ḅ½Å7Fa,¼½ᑮ¿ᐝᱏḄÅ7FL,¿ᐝᱏk<ÑÆcḄÅ7Fb,ᑣᐝḄ®¯ᐭ×Ø4ᑏ⊤Ú-L-ÛÐ.ÜL=1.0000m,a=0.220mm.᝞Çᡠß`ᵨᓝᑖá᪗ᓱä¿ᐝᱏkå1¬Æcᑮå4¬ÆcḄÅ7-8.5mm.g*ᐝḄ®¯ᐭ=6.2ஹ10-7m4Hᶇ2lᨵᦔᦪîÐ.42Ð᝞g*;x¸ᐝᣚᡂñᐝ¿ᐝᱏk<ÑÆcḄÅ7xò4ó“òᜧ஻ஹ"ò஻ஹ“ò஻Ð.ὃc3ᵨ¼½ö÷ᐝḄ®¯.ø⚪3g*⚪.ᑖ᪆341Ðá᪗ᓱäḄúᦪ=Yûäúᦪüká᪗úᦪ◤⌕ýú.᪷ÿ*
ᐭᐝḄ.d2ᐝḄᐝ᪷ᐭᑨᐝᵯdḄᓄ.

47!"#!#1%&'ᦪ)8mm,-᪗'ᦪ)O.lx5=O.5mm,ᡠ5678ᐝ9ᑮ6;8ᐝ9Ḅ<8.5mm.=)>?ᡠ5d*0-3_xo.22X10~37?#:-----?---------------------=6.2x10m2᪷
ᐭGHIᐝ9ḄdJ
.ᦑ"ᫀ)#1M,8.5N6.2x107
.2L9P#Q⚪ὃTᵨᐝḄVWXYᐝḄ!Z[⚪Ḅᐵ]^_-᪗ᓱ&Ḅ'ᦪab5c^_ᩩe
fd21.
ghijᙠlmnᵨᓫ᤮XqrstuvḄwxyzᨵᔠ〉Ḅ᤮ᳫᑮ7ᙽᜧ
)3cm,᜜ᑣḄᜧᳮᙽ
ᳫ.Ḅwx<#A.Jᙽᵨ9)M,JḄIqO9᝞ᡠB.ᵨ¢v&XYOMḄv1£)᤮C.Jᙽ¥¦785஺Ḅ¨©ᯠ«ᵫ☟®¯°D.²᤮ᳫ᤮ᑮᨬ´9µ¦¶µXᙽ·¸ᨬ´930¹Ḅºµ3ᵫT=_L½ᕜ¿301ᑣQhi5IwxÀᨵ┯ÂḄ

482᪷ᓫ᤮ᕜ¿ÇÈÉÊ˽rstuvḄ⊤ÍÈ)Î12ᓫNÏQhiᵨ0MḄ£)᤮ᐭIÐÇÈᐸ┯ÂÒÓÔÕ᪵n×ØḄÙÂÚJÛrstuvḄXYÜ-
ÝwÜÃᜧஹ
ᡈàNÏQhiᦋ᤮âãä¹XYᐜæ¸ç9b£T2-1èéᑭᵨèḄë᳛ᩭ!rstuvᑣᵨOMḄv£)᤮JÛrstuvḄXYÜ.àÝwÜÃᜧஹ
ᡈà.ὃ9#ᵨᓫ᤮Xqrstuv.î⚪#wx⚪.ᑖ᪆#1᤮àñ9ᑮᜧᳮᙽḄòóḄNᓫ᤮ᙠ᤮©ô
µ
5஺Ëõᡂ÷øùúNᙠᨬ´9uvᨬᜧ²ᨬû9¦¶µÂÚᨬᜧN2᪷ᓫ᤮Ḅᕜ¿ÇȽᑮgḄ⊤ÍÈéᑖ᪆ÂÚḄᜧ
Nýᵨᓫ᤮ᕜ¿ÇÈèḄþᦪ⊤ÍÈᯠ«᪷þᦪ⊤ÍÈᑖ᪆"⚪.

49!"#!#1AஹJᙽᵨ9)M,JḄIqO9᝞ᡠÿ
ᘤᩞ
ᦑABஹᑮᙽḄ᤮ᵨ!OM$%&Ḅ1()᤮᤮!┯+ᦑB┯+Cஹᓫ᤮ᙠ/᤮01Ḅ2345236ᙽ789:;5°Ḅ>0ᯠ@ᵫ☟CDEᦑCDஹG᤮ᳫ᤮ᑮᨬJK8LMKNᙽOPᨬJ30SḄTK$t,ᕜXYT=J⊵_L,ᦑD┯+ᦑ⌱YBC.n^01522b2dᵫᓫ᤮ᕜXefYT=2Tl:ghiYgkᑏ1;ᵨOMḄ()᤮ᡠ᤮1>/ᵫopᡠT2g>/ᵫᓫ᤮ᕜXefYT=2nborYT2=ᗗ1,T2-1vwḄx᳛:gghiYg=®,OM$%&Ḅ()᤮T2-1vkwḄx᳛o}~kḄ!
ᵫᡠopgḄ!k
ᦑᫀ)Yb1dBCb2dgk1/.°T2

50Y⚪ὃᵨᓫ᤮ghi
Ḅ
ஹ⚗ஹghiஹ
+ᑖ᪆p⍝
ᳮ
⚗ᓽo⚪,ᵨᓫ᤮ᕜXefT=2ᐔ¡⚪Ḅᐵ£.#ஹKL⚪ᜧ⚪ᐳ4⚪22⚪4ᑖ23⚪6ᑖ24⚪8ᑖ25⚪12ᑖᐳ30ᑖ⌕-ᑏ!N⌕ḄᦻPQRஹSTUVWLXY'ᑏ!ᨬ[\ᫀḄ2^/ᑖᨵᦪ`KLḄ⚪\ᫀ&NaᑏRᦪ`Vᓫc22.¤¦ᑭᵨ¨©ªᩭ¬ᜐ¯°Ḅ±².³p´¨©ª⚣᳛)1.0xl05Hz,´K¶¨©ªᙠ·¸¹ºḄª3vw᝞vᡠ¼.b1d¨©ªᙠ·¸¹ºḄªi2
½r¨©ª¾¿G¤ᑮ¯°ÀÁ9SᡠᵨK$)4s,¯°¤$ḄbÂᶍį°Ḅ23d.ὃYŪḄvwªஹ⚣᳛ĪiḄᐵÆ.Ç⚪YÈ3vɪ3vÉÇ⚪.

51ᑖ᪆Yᵫ⚣᳛ĪNªiV,᪷̾¿G¤ᑮ¯°ÀÁ9SᡠᵨK$)4s,N¯°¤$Ḅx=3vt.2YYᵫªÑvÒNªᐭ=15x103mᵫªiefrv=Xf=15x103x105m/s=1500m/sজ¯°¤Ḅ)x=lvtঝὶÜজঝfÝᐭᦪÌrx=3000m.:(1)¨©ªᙠ·¸¹ºḄªi1500m/s(2)¯°¤$Ḅ3000m.Y⚪ὃᳮÈ3vwĪ3vwὶÆḄágÄ(vág.ªᙠâ9ãä¸å)ᒴi¹ºḄ.23.çèᐝêᩞᧇᑴᡂḄî0ïðñNB=30஺ᐸᢚö᳛)2,9÷ª)566nmḄᓫ⁐ᐝᚖîAC☢öᔣðñ(᝞vᡠ¼)ᐭö)O,Y(1)ýᓫ⁐ᐝᙠðñ¸Ḅª(2)þᑨᓫ⁐ᐝᔲᙠAB☢ᐰ,ᳮᵫ.ὃᐝḄᢚ.⚪ᐝḄᢚ⚪.

52ᑖ᪆(1)ᐝ&'()*ᐭ,'()*⚣᳛/01᪷3ᐝ456v=£:v=ᐭf<=>ᓫ⁐ᐝᙠ?@AḄBC.n(2)ᵫsinCT<=ᐰJKLC,᪷3ᐝMᙠAB☢ḄᐭnLNCḄᜧP1ᑨᔲᐰ.RSR(1)TᐝBᙠ)*AḄ4UVWWnᵫCWᐭf,VWᐭ'fY>ᓫ⁐ᐝᙠ?@AḄBCᐭZ஽2t=283nmfn(2)ᐰJKLsinC=l=l,C=30°n2ABK☢ḄᐭLi=6(r>C,ᡠgᓫ⁐ᐝᙠAB☢ᐰ.S(1)>ᓫ⁐ᐝᙠ?@AḄBCh283nmi(2)jᑨᓫ⁐ᐝᙠAB☢ᐰ.kl⚪⌕nᐝ&'()*oᐭ,'()*p⚣᳛q/0Ḅ.⌕rsᐰḄᩩu1᪷3ᐭLvJKLḄᜧPᑨᔲᐰ.24.xq'(yឋ{|1}⌕ᩭ/ᔠḄஹᜋẈஹᩞᩞᧇ.ᔾp{{|oᐭ1⊦0py=aM1(MP"஻'᪵1¡¢£1&¤¥¦ஹ§⊈©.ªᨵ'☟Ḅx᪶222Rn86a⊦01y='°4Uhvoஹ*²hmḄa³´v'

53°*²hMḄ¶᪶┐¸஺º>»¼½²¾ឤÀ1ªÁ᪶⊦0p1ÂyḄ²ᐰÃÄᓄha³´v┐᪶Ḅ½.º1Àᑏ=⊦0Ǽiº2À<=¶᪶ÈḄ4UiºÉÊËÌᵨ⚪AÎÏ⊤ÑÀº3À<='⊦0»¼AḄ*²Ò£.ºÉÊËÌᵨ⚪AÎÏ⊤ÑÀὃ᰿ÔÕᚆ*Ǽi×0ØvÙ0Ø.⚪᰿ÔÕᚆḄ*ǼØᵨ⚪.ᑖ᪆º1À᪶Ø»¼*²ᦪN᪶ᵯ₹ᦪ¾ឤ1᪷3*²ᦪN᪶ᵯ₹ᦪ¾ឤᑏ=᪶ØǼ6.º2À᪶Ø»¼½²¾ឤ1ᵫ½²¾ឤÝg<=┐Ḅ4U.º3À᪷3½²¾ឤஹ²¾ឤ<=ÂyḄ᪶1Þ»᰿ÔÕᚆ*Ǽ<=*²Ò£.RSRº1Àᵫ*²ᦪv᪶ᵯ₹ᦪ¾ឤÝß1᪶ØǼ6h4He222Rnà2á0+28684º2À᪶Ø»¼½²¾ឤ1gaä´Ḅ4UÇᔣhæÇᔣ,ᵫ½²¾ឤYmvo+Mv=O,RYvW-ᔳ1ëì⊤ÑÇᔣNaä´4UÇᔣíiMº3À⊦0»¼îḄ²

54ïE-JmvºÀ2+/Mv2=M+m111Vo,222Mᵫ᰿ÔÕᚆ*ǼYïE=Ame2,RYïm=*mô2Mc2Sº1Àᢈ0Ǽh*2Rnà2isPo+'Hei86842º2À⊦0ᡂḄ┐᪶Ḅ4UᜧPhø1ÇᔣNaä´M4UÇᔣíi3'⊦0»¼AḄ*²Ò£h9^^1.kl⚪ὃùúᑏ᪶ØǼ6ஹ<ä´4Uஹ<*²Ò£û⚪1Øᵨ*²ᦪN᪶ᵯ₹ᦪ¾ឤஹ½²¾ឤᓽÝænR⚪1ᐜ<=⊦0»¼ÂyḄ²1ᯠÿᵨ.25.12ᑖ2015᧡•᝞ᡠ!"#☢ᑁᨵ'()ஹ+,ᵯ.Ḅ01#2ᐝ456789ᙳ;L=0.5m,@ABCDR=2QḄGHᵯ.IJKḄLMᑁNᙠᚖ"Q☢ᔣᑁஹSTU9B=2TḄᒴUSY.Zᐰ\]Ḅ0᪷5ᩚ1`2☠ᙠ67@5ᩚb67c8db67Befgᵯ.ᙳ;r=lQ.j5ᩚ1kGᙠSYḄ@lmnᙠoSYᑁ5ᩚ2pSYlq@ho=O.8mᜐᵫ☟yz{|ᐭSY~ាᒴ.glOm*.15ᩚḄm;ᜧ

552
5ᩚ2pSYlq@h0.2mᜐᵫ☟yz{|ᐭSYC~ᒴ.oᵯ.RḄ;0.7J,5ᩚ2ᙠSYKḄ9h2ᙠo5ᩚ☢Ḅᵯ₹q3
5ᩚ2pSYlq@h3ᜐ☟yz{]☟yz{5ᩚ1.5ᩚ19;lm/s,5ᩚ2ាg|ᐭSY⌕¡5ᩚ1`5ᩚ2¢£ᒴᑣ5ᩚ2Ḅz{9h3¥;ᜧὃ§¨6©ᑗᒘSTJḄTᵯ¬ᔠᵯ¯Ḅ°±G².³⚪¨ᵯSTbᵯ¯µᔠ.ᑖ᪆¨1
5ᩚ2|ᐭSY·¸ᵫ©ᵫ¹º»|ᐭSYḄ9v,|ᐭSY~ᒴ¼½b¾¿½#⊝E=BLv,IÁÂஹF=BIL,#⊝ᩩÄR+2rÅm.

56(2)5ᩚ2|ᐭSYC~ᒴ9ᜧÈncÉv.᪷ËÌឤh2,ᵫÎFÐq=*t2ᵯq.(3)ᵫ#⊝ᐵÕÅᵯÖᜧÈ×ᵫ0ØᑗᒘSTJḄᵯ¬ᵫ°±G²Ù9×ᵫ¸ᵫ©Ú²ÅKḄ9.ÙÛ¨Ù¨(1)5ᩚ2|ᐭSY·¸ᵫ©ᵫv2=2ghoÅ5ᩚ2|ᐭSYḄ9v=V2ghO=4m/sJTLm5ᩚ2|ᐭSY~â½#⊝¨mgÁBILdE=BLvm,IÁÂ2r+R09:(2r+R)gÙŨm=O.lkg(2)ç5ᩚ2è|ᐭSYḄ9;vv2=2ghiÙÅêÁ◌:2m/s5ᩚ2|ᐭSYᑮᒴḄç5ᩚ2ᙠSYᑁKîh2.oᵯ.Rஹ5ᩚ1`5ᩚ2ïὶᵯÖ\c.ᦑò¯Ḅ¨Q=2r+R=1.4JQR"RᵫÌឤG²ᨵ¨ng(hi+h2)4mY+Q1122mÙÅh2=1.3m

57öᵫᔳt2øᵯSTG²ùÁߟûR+2rdq=Tt:üý2X0.5XL3=0.65C“R+2r1+2xo.5(3)ᩚ2ᐭᩚ12ḄᑖVIஹV2,ᩚᡠ!⌕#$%ᒴ'(ᑣᨵ:mg=BIL2ᵯ45Ḅᵯ6I78R+2rᩚᑗᒘᡠ;<Ḅᵯ=>E=EI+E2=BLV1+BLV2ὶBCDEV2=mg(')…FB2L2CDEV2=3m/sF2᪷JKᵫ(MNOPDEh3=^2gCDEh3=0.45mFUE(1)ᩚḄVWm0.1kgF(2)ᙠZ[\5][^_`☢Ḅᵯ₹W0.65CF(3)ᩚ2Ḅdefh3gh0.45m.ijEk⚪mᵯngopqrḄsᔠu3vᐵxmᢕzᩚḄ{|}~ḄW◚Ḅᩩᑖ᪆ᩚḄᐵ.