so GD - or Ha ruOr f nU'Oi'lC Tt{pT CllU Vrtr,,l aN DE TFII TH-U DAI I-IQC 1/'ru TFIIJNHAT NAM HOC(2009-2O IO) nd rnl r!{Ac NGr{r0M naON: vAr'r.i Thd'i gian ldm brii: 90 phtit (60 cau triic nghi€rii) Ho tOn:. So brio clanh: Cgs]r Ph6 ron;, ;\. NAng luo-ng B. Khdi luong nghi C. T5e palg D. Di€' tfc5 Cau 2: plrdt bidu naoiau day ching nha.t:' ! tru rrctrEr u A. VAn toc i{nh siing lu6n bang c = 3.10s m/s B. VAn toc rinh sdn[ chi ptrLr rtiuOc vAo nr6i rrtid.ng C. Van tOc zinh siing chi plrLr thLrOc viio rA-n so cua];hO ron D. Va'tdc iinh sdrrg phu thuoc u}o.,cii-moi rrtLtr.n!'vaien ,ocua ph. t6n. caiu 3: Tai thdi didm r, o9 prrong xa cita rnaLr char rir i vrr i"i rrro'i cridrn r, ri y. NeLr crru r<j, biin rfr cua chiir 'ph<5ng x;r li r thi so hat nharipharira rr.orrg r,rroa,rg rr,Ji ainn ,, -,,,, A.x-y B.f*-vl$ q.(x-v)i \^ - r)T - htl D. xr,-yr, cau 4: Czic hat triti (T) vir clotOri (D) than gizr pliein Lirrg nhi€t iinch si,rh r.a hai a vr)r rlotror.r. bic{t ri. htrr khoi cfril naA gtr: t z.z Mev ^, ) nirng ltrclrg toii L- triti lA A,,,1.= 0,0087u, cira dotCri A,,,,r=0,0024tr, cr'ra lrat 1;1: A,,,,, =0,0305u (ltr = 93 l,-5 lii tiL phiin L'lttg tren: ;\. 18,06 (Mev) _ B. 38,73 (Mev) C. t8,06 (J) D. 38.73 (J) CAu 5: F[iQn. tugng quang dAn li hi6n tuong A. Girirn *a'rr cii€n tro s,at ct'ra ctril birn clAn khi bi chieu sring B. Giilm rnanh cri€n tro cira m6r s6 kim roai r.rri ,r,iq.l i€ir siing C. Chat brin df;n khi cluo-c chi6u siing s6 ngiurg clan.ciien D. Dien rro cira kirn loai tang l0n khi bi chieu siing. #',fl:ti,l'?HTl lt3t,fltt' r'ie ioie" rlte U^,. = leee-5 (V) ciien tii bin ra rir ca tor cd ci6ng 'ing rr'' ri,iLr rir A. f = 3.l0r5 (Ilz) B. f = 5,43.10,,, (l-lz) C. l.< 4,g3.lore (Hz) D. f = 5,43. lOri (llz.) cirr 7: Iludc s<lng.cldi nhat cfra quang phd thuoc z aayl-oi,rlan 'i\ Banrne lii' lrro-t lzl: 0.l2lg (lLrr): 0.6.56.r (iLm). Vach tlrf 2 cdra crdy r,airna' c6 LrLrric s6ng rii: r.rr rlrur r(t' virzro \ftrrr/' t ]" = 0,1037 (prm) . Il. l = 0,1038 (FLm) C. l" = 103 (rrm) ' I). i. = o.iozt: (l,n-rt cau {l: Bii' ki'h c1Lr!.ciao Bo l} ri, = 0,53. 10 t"-tyi2. N;;;; j"d cLrc crai cld ion rroii ng,y€n tir. Hycrio rA A = r3,-58 (ev). Khi nguy€n tu mi elecrron 6"qu! clero r,, = D.OS. tO 'fr1mi,iTrl ,lang lLlo. ng 6 rrang thi{i dimg E,, c6 gi/r tr.i lA: A. -2,26 (ev). s. _b,-8+e re;l c. i,-ii-i."1 \ n. _0.377 (evr (lau 9: Chon cAu sai A. Anh sting clon sfrc li iinh si4ng ccl riin s0 xtic tlinh ll' Tia td'i Iaing kirlh cd rniLr naolkhtic xa r-a t,", iing kfnh c6 rnaLr clo, rhi ria tdi lA tinh sii'g clo-n sic. c' chirr-n tia tdi lang kinh lir chirin song song, chr'ru-r khuc xa van song song th) chirrn siirrg niy lh clon sic. D' Mor chirm sr{'[ d6, kh6'g ntrat tt]iet cii re ert*ang'oon si Cau l0:. Phrin fng nhi€t liach le pirail ,irlg lror ,rtran A. Toh ra m6t nhiet lu.ong ld.n I rrr nang iu'ong r,h;;;;;r;'xor nhier cio cao rndi rhrrc hi€n cruoc :^ l{"p thu nrot nlier tu.o:ng ltin ' D' Jl'orls cJ6 hzrt ntran ctrairic nguyen rir bi rrrrrrg nriug chiiy t5.inh ciic pLrclo' Carr Il:.Song si-eu Arn lh sdng c6; 1 Jd. do l6.n hon 340rn/s ' lJ. Tdn so rr0n 2ol{Flz ._ C_ l'oc ci6 nh6 hon 34Om/s O. i.an sd rrho h<rrr l6Hz cau l2: T|ong thf nghi€m giao thoa khe IAng, nq-u6n sting S flriit ra cldng thd.i 2 bfrc xa; 1., = 0.6purr vi\ l-,; a = S,S' = 0'2 (nlrll); D = Irn tllng klroting,0,,g L = ?.2fc111 rr.6n rr1\p rlern cjrrcrc l7 r,iic6 sdng tr.ong iiti cti 3 r,acl lir .'\. 0,4811ni B. O,.l0lrnr (i. 0,.,14pLrrr D. 0,50;L'r **# t.'."ng.thf tlghiern giao tlttla t,t," t^ng a - 2nnr, I) = 2nr ngrron Phrit r.a zinh siirg ilrr' siic.'l'ai 'i rri ciielj \/illl ll'tlilg ilitti o'(l (rrtrtl) cti t.ttot v;rclt siing. [3Lrcic s(lrrg ct'iir iirrh siirrg (loll s^c cri gili Lri: ( Prrec i /5 ) A. l hieu dfr kiOn 13' )', = 0'4 (PLrn) cau 14: lvlot rnacli clao c16ng LC, ti rhbi ciidrn ban rliu clierr tich iien tLr ciien d4t .,-rc cloi Q,, = l0 *c' 'lhdi gian tlil - -tq t{r-6-nglrct-d-rQn tich li 2pLs' CLrdng clQ hiQtl4UIte gi'jt tldng dien tlong-rna-ch lir: ,\'is;'il B'1's?i;'A " c' 7'85rnr\ D' 78'52ntA CaLrl5:r.''ng'"e.'nguydntitBo,trarigtlr6idl.rrglittt.lrrgtlit,ti: rf . fvf,i"to cO tnE t?nh clLro-c clinh xirc nting ltLo-'g cr"ra n6' ts. Nguy€n tit khOng hap thu iiartg lLLgng- ' C Tt?t s ;; "ilv'; tu'c6 nang lirong. xirc ciinh vh khong bri'c xa n. fr4a 'iing tuq'ig nguyert tir l'hong tlr6 thay tlcii cltio-c' cau 16: .rrorg .rerch ciao oong i, C oig,t-ro,r1r,a,ir,.1-,"J,rrriang ki c.Lr-srlu uhlLtrg khoh.g tlibi gia' bAng 0'2'5' lt) , 1s;. rh.i ,ra,-,gT.iq,re ciien tr;o'g1ai bang rr,ng lso.tr-e ttl triLO'nglCh'ky dao c16'g cira mzrch lir: n.t0'(s)B.0,rtl6'l'i';""'='-c'o's'td:u(t)D'2'100(s) **f'#;lrunXi,ftli,'""j'f,Sttfil hl.rlfn rro'g chan $ol'e duoi crang s6rrg, cto rh s6ng cri.n tir B. s6ng cli6n til tan rruydn vdi vln ioc rdt 16". i;';;;; ctian t<trorig van toci16 ba.g 3' 10*rn/l Sl::1,?X':Jl',T,'lf:9,,'flgg,l,1li'i,.",,* q'ir rr).n ran rr:uv€n s6ng dien.tir thi cii0n trtLd'g bierr thi€. vir tir trub.n-e bid#1,iil';;;;0."s;ffiq;il;"i;t,ii,ng u,,ong g6c vdi phLrong trLrvdn s6ng' cirtr 18: d;;;;;;"ii khi"n6i uE iong clio^ tir': b A. S6ng dien tir mang nang luong ^. .r-:A., .,,,A-rr ,.1', rr'rr' lJ. C6 thh'h phAn clie',a fi]Anft p"hrin tir bi€* tlii€rl vt-tOttg pha uhau' c. g;;ic'iit' ta s6ng *gang D. 56rr! cli0n tir c6 th€ phin x4, kliric xtt nh sd'g c = 3.lgsm/s. l1L6c s6rrg clie n cnir 19: m:rch chon s6ng rniiythu gdrn L= 6'76!LIl' c= l-50pF' toc dQzinh sang c = -J'lU rT/s tir m)r rndY thu dr-ro-c lh: r\. 50rn tll'l' 60''.' C' 4orrr D' Torl Cau 20: Dbng c1i0n tro,'g *4t1"' L'.C ly tuong c5 L = 44ll c6 dd thi t f,i't f.rintt vEr trr clien c5 di0n clung lit: A.C=5lLIr I]'C=-5P1tr C. C = 25nF D' C= 50PF L'Au 21: nrachnoi tiep c6 U, R, L' C thong cldi' o thay ddi citrgc' maclt clang cOng hutrng, Ia iiug to rnQt ctrfrt tiL gi6 tri cOng huong' ptiat UieLr uLo sirtt dAy l<hOng chittlr xac-: {. I gitim " B' Un giAm il:,uigiat" *"D. u.,giA'n- 4 , :a -*a ,r.A ,, - rT ,uorrlt*u,iiTli:,,.rien eonrDn ,Y;;illJ'r, ciat hi€Lr cii.' the 11 = u,,cost,rr cudng ci6 dbng cri€' t€ctr ph, so vo'i hieu cli6n the 2 ctdLr ,r,t',"I-, 1 Ll'it .J LJi L'lt r- r,'r - RI r- RJ5 . A. o) - lJ. u) = E C' cl,= RL'J3 D' 'ul = L carr 23: vdi uR,ll,u,, LrR. Lrr:1, r:y Jigie'iip hiQLr lqng,Yetftc thoi cia l{' l'' c' I vh i lit crrdrtg tlo clorrg tlien hiOr-r clLrng vir tfrc UrOi qi^ cli.pildn tir cl6. Bidtr t6ltc khO'g drhng ll: n r-Uo B.i=\ r=9 o.i=* A. l R U.' R Z' Z, Ciu24:l(hi bi€n th€ hoat cl6ng vri'i che clQ-k1iort,* lti;::ltr lt\ rn4ch thtl cap dd ho)' Chon phirt bidu dfrng: -e. Cr.tb'ng t10 liiert clutlg qi:a cuQu so cap l' = U vl lz = u' B. CtLo'ng clO clbng tli6n so citp rAt nl16 c ctLOug d0 cldng soc,ip l, = + r-at l(rn ud'u l,= 0. ruy nhi€n cuou socap khorrg tieu thu coug sttat' 1-l ce,, zs?M:1 l;5, 5"l,Tol,'J ,., !. .b:",.r:,rr* rri0u cri€' rrro 2 rliiLr ru: Lr=U,,cos r0.ooor' c = r Ft-' L bii.g: i\. rO, (l-r) -rqv \r\-DIj. z.rO' (tti "'="'t. +.tO'(ttl' D''i02(ll) s"Zo;r:'iil;:i:iiisT;?,;""r,il:,;1'*:lll;,,,u ,* ( i ,r.rii'g thi:ri crao clo'g D crr*r r<! rrao cl6'g ' (iragc 2/5) {)ttu-27: MQt sgi tliiy dAn hdi cliri l00cm, mot dau clLloc noi vio mcit uhiiuli aur rhoa. rliiu kia glLr.co tlirrli. lilr Iirn thoa dao dong.f =2OOl-Iz thi tao ra sdng cliuig t|en clay. Biet van toc truy€n s6ng r, = -50r11/s. Coi diiLr rrlririlt arn tJroa lI rnot cli€il c6 cjinh. so bLrng s6nglren clay li: ,,-A.8- - B, 10,-_- . c.g _D 6, Carr 2ll:.Chon ra.plri{r bidu dring khi b}n vd tilrrudng.l,iny trong ci6ng cokli6lg cldng bo. $. j.u"truolg qu_ay rrong dong cd clo narn chim-oriay gay ra q qli c6 ddng 3 pha mdi gay ra ctu'oc rir.rrud.ng qr.,iy- ' ! ltri cd ddng I pha rn6i gay ra dLLoc tir.t,.,dn! qurj, I), Cd A, B, C ctdu l2l phrir iiieu kh6ng chfnh xril. ' - Ci:: 29: Vdi mach xoay chitiu chrlra C, L thkldng cli0n i: ,'\. vai diOn iip Lr lrai dziu mach lu6n vuong pha C. vI di€n ilrp Lr hai cldu ntach tirOn cirng plia . B. r,A cli€n zip u hai dALr urach li.ron pgrro-c irha D. s5'm pha lion di6n rip hai ri.iLr nrac.ir 9()'l cirr 30: cho mach R = 100o. L. c= 9,0, rn6c noi rieb. Dar vho2 cltiLr mach hi€Lr dien rhc xoay chiciLr riirr so 1'= -50llz tlr'i U^,,r,,\ U,,r, r,u6'g nn.1;, 'hau. Giei,ri f- fa, ) A. I_ = _(Ij) n t; c. L = ./l(rr) '17 CAu 31: MOt vAt tham gia cldng thdi 2 clao c10ng: x, = r\,cos(c,rr- I ) (cn); Xz = 3cos (ot+I) (crn) rrdio: = 2}radls.Bid[ \,,,,.,, = l40cnr/s. Bi€n ri6 A, cira clao flong tfifr I lz): a '! R. L =:(LI) n I l). L = -(H) 7t (lrru 32: N"ltlt vat clttryen dong theo phuong tr"inh: x = -cos(4nt 4 r(crl). 'lirn ciru tr.ii to'i rtring: J r\. VAt nz\y klidng clao clong tlidLr hoir vi c6bi0n ci6 Arn. IJ. \'et n2iy clao c16ng v6.i bi€n d0 lcrl vh tdn so 4nIlz. c. f:-ri r - 0 r'4t cd ly cro x = 0.5 cm 'i crang cli vd vi tri ca' ba'g D- Tai t = 0 vAt cd ly cr6 x = 0,5cnr vA crang* cli ra x;i vi trf can biing Ciu 33: Chon phr{t bidu chfnh xi{c nhdt: A' Tai .gLrdl l<horrg ngrre cruoc sidu am rir cro tdn so clud cao 1l 'I'ai ngLLd'i khOng nglte ciLroc sdng ha anr vi sdng nay c,i nalg luo-ng qud lho !t-!^i ngu'bi khong,.,gl'," otio,'2li4i ar4 n6i rr€;le vi tai ngudi clii c6rig hrLdng vd.i czic tdn so tiL t6t-i;: den 20.0o0FI2. Si€u am vh haim cd d6 nhiiy bring 0 crtii r,di tai ngud'i. D. Ce A, B, C ctdu ctLlng. L^1u 3a: Dao ci6ng didLr IioA cd phuo'ng trinh: x - Acos(-5nr + n). I(d ril lric r = 0, ldp rlti. 9 nri cl'.g 'ir'g btlrg the nang li: 4.772A G) B. 57120 (s) C 17120 (s) D. Idet qLrA t<hi:rc cau 35: MQt song co lan truy€' trong mdt ur0i r.rd'rig vo'i prruoLrg tr-inh: . (n rcl n\ p r'r =4cosl -r+ aJ(cnr)-Trortgd6: cl tfrrhbnngrn,ttfnhbirnggiay.VAnroctr.Lrydlsdngit\; \6 24 r) A. Bcrn B. lOcm C. 6crn D.9crn A.'4oOcrn/s B. 4crirls CAU 36: VAt clao clOng clidu hoi khi: A' Qrra vi rr-f cAn bring toc rlo bang 0, do rtin gia toc bang krr6rrg. \ozbien'tocr1obeing0,c1ololigizrtocbirrrgklrorrg. C. QLra'i rri ca' birng toc cro bang-khong. cr6 ion gia'ro. crLc ciai. ^_I)- Quo vi rr-i cAn birng roc cio cuclJai, gii rOc bang''0. Cau 37: vat clao rlorrg cii€u tti uoi'.t'ri'k},'T.ihd'i giu,r ,rgan nhat cle var di rir vi rr-i ca' birng rle'ri 'i rr.i co ly cl6 bing ll2 bien cio li: "J ^' ^ ""'b""'rrb("' rrr r\. 't /(r IJ. T/r ( .r./4 D. T/tZ Carl 'l'9: "li'orlg clttii l|irtlt nlot va{ claoclong ciiorr hoi\. tip hcrp 3 riai lrrong ni'ro sau cluy riotr cd gili tr.i l<irong tlOi'l 1) _!l],,tdc. lrrc. ctr-rr-rrq li. Ili€rr rio, ri, s. go., glu roc 5"' (l l'iirr s<j{:(ic, gilr tirc,lr.rc f .r C'1t',,r,,S, bitlir cio. riirr so g(rc (lr1gc 3l_5) IrLc @lp j AI\48 D. ,5cm/s C. .5rr/s carr.xg: Mot song co hoc trr-rydu qua mot Iroi tnrd'ng vtlt.cllat. ket lUAn triio sartclAy lh sai? .=.*,r. Van to. clao c16'g cua cdc phdn tir 'rOi tr-r-rbLrg bang toc dO trtrydn.s6ng' B. Tr.ong t trong t<tri]cac phdn tir khi clao clOng theo plrtrong truydrl sdng - -C. Tr6n ,"Ii tiiia.;l6cplidir tirirLroc clao cl6ng: theophtro'ng vrtong g6c v6'i mlt nttd'c D. Circ ptrdn tir m0i truong dao cl0ng l<lri cd song.tr-uydn qLra cittr 40: Dao clong rli(iLr hoi,L cri phr.roilg tlinh: x = 2cos {2trt + | I tcrnl. Ldn tlll]r 2009 v4t lrl qtrll vi tli cti ly ti<i x (, = -l (crn) lir vho thb'i clidnr: A. 1004,25 (s) pnA, A, ft*" ,ttr'r'rrg tri,rh rh"d" hoac phdn B theo chrto'rzg trinlt rtdrtg ccto ^Plr-(i,, A' TJrno cl,u','''lu ti"l' 'J"'i" (Tt''' tA" 4l '10" ''fi"50' Ciu 4l: Di0n tir trudng sinh ra b6'i: -A. Quii cdu ticli clien khong ddi'.dii,t co dinh 9 c0 l4l . e. Mgt tLr ciiQn xd'c clinh c6lien rich khOng deii' d4t co l4p C. DOng ciien khOng cldi chay qrta ong clAy xhc clinh D. Tia llra ciiOn it Ciu 42: Dirt viro 2 cllirr cloan 'rarch chi c<i rn6t phiin tiL. mot hiOtrcti6n tlte xoay chidLr: rt = Lj,,sitt (trtl + - ) (r') thi 3n clbng clie n chay clua phdn tii' c16 c6 bidLr thric i = I,,cos (tr:t 7 I (A)' Phdn tit dd ll: A. Di€n tto thudt-r IJ''fL't di0tr C. CuQn clAy thuiin ctirn D' CLrOn dAy c6 di6n tro ') carr43:cu6rclayth*rincei'r: L=!(ll)micnoi ticpv6itLrC=3l,BpFclidntlpdatvdo2dducuonday: t-t = 1l Tl ^r- r.',. lO0 cos ( tOOnt + ; ) tui. Ilidu thric clbng dien quir ulerch ll'i b Il. 0,25 (s) C. 2008,25(s) D. (0,25+k) lt r\. i ; 0,5 cos(lOOirt - 5 ) tn) It B. i = 0,-5 cos(lO0nt + ; ) (A) J C. i=cos(l00nt* lltr,l D' i=c(rs(l00nt- {l to' ) cau 44: l-zri s tr.€n mirr nudc .guiin so'g phirt rii ilao c'-ong cliSu hoh vdi f = 50Hz' -fai 2 didm M 'ir N tr€n prrLro'g rruydn s6ng (MN = gcur)dao_crEng cirng pha_vdi-nhaLr (bict van toc tr*ydn s6ng.am tro'g khoting tir lOcrn/i rten 80cnr/s)' VAn toc truydn s6ng tr0n mitt nLtdc llt: i\ 75crn/s B' -g0cm/s C' TOcm/s D' 72cmls cau 45: Trong rhier bi klie la'g ngud. phdt ra bfrc xa clon sirc c6 br-rdc s6ng o trong-k-liorru o7l-Lrn tfd' 0;761-rrn' a = 2rnm. D = 2m. Tai 'i trf c6ch van trung taur l,-55 (rn''r) li\ mot vacl] sr{ng. Budc s6ng ciia virch sii.g d6 li'\: A. 'fhieLr clit kiOn B. 0.55 (pm) Cl. 0 516 (Ptm) D' 0'65 (Prm) . . Criu46: MotvatdaoclOngciidLrhol.tocctQctravAt'9::9d4ikhi: t ^., , ,.it, ri,rolrl'n :.\. LU UO .i o uii & ,iQ l6n cLlc cl4i . 'i B. LU. tiic c'.r'g vtio vAt b.ing kh6'g C. Gia toc cria "ai"O Ao tOn iut tiai D' Pha ban cidu cuc cl:ri cfrr 47:Lf clo.td ,rguoirrinuon thay the ngudn nnng lugng.pian hacir bing nztng lLLgng lhie t hzrch lit Vi: A'Clriphiclduttrtlr{p-I],Ciirthirnhdienrrirrrgre . C. NgLryen iie,, cl6i clno D' De vAn ltlult cAu 4ll; Giir sir saLr 4 gib (kd tir thdiclidm ba' cld.) sd har',rtran "iu, ntnLr chat cldng vi ph6'g xzr l'ri phan rf, l'rarrg 75a/o s|lrat nhAu ban cldr,r. chu k],brin ra cira chat phting xar c16 trang: .r\. 4 gio ''"" -t'-U ') giO C' 3 gid' ' B gid Cirrr 49: Dao clo'g clidu hoi c6 prruo'g rri'h rt\ x = 4cos (l0nt-f l t.,r.,l.'l'ho"i clidm cld* ti.rr (satr thdi didnr t = 0) uiir r,ait lip liri vi tt'i batr tliitr Ii ltic: 12lll z\. t, = - (s) li. [, =: (s) C' t, = lt (t' D t' = - ts) (Pagc 4/-5) 1T 1l Xr =4cos (l0t + - ) (crrr): xr = r\,sirr (l0t - -) (crir) 44 Do-l6nviurtoc-cira\/Atkhi c}rai,i tlicirutranglz\30cni/s. BierrdOdaodQngl\2 l;\: A.3crrr 'B. Icrl ,t' R 12 I. B.' t, Cl. Tcrn T c. 16 l). Tcrn vI .l cm T D 1A L+ f!fu n: f nco cnrcns Carr 51: MOt lLro-ng chat ph6ng xa Rn 222, c6l<lroi luo-ng ban ciAu lI lmg. Sau 15,2 ngAy thi l<hoi luong cuit rt6 cdn lai 6,25Vo (No = 6,02.102r mol-'). DO ph6ng xa cizr chat phdng xii tai thdi didrn nt\y lir: A.'ll = 3.58.tOrr Bq B. I-l = 0,9'l ci C. I-l = 3,,58.10r" Bq D. H = 3-5,8 ci Ciu 52: Bidu rhri'c tidng ciiOn tlong marcli l,ir: i= 4sin l00nt (A) (i do bAng giay;.Tai thoi di€rl tr nao ckl tlt)rtg cli€n clang giarl vd c6 cudrrg dO lA 24.Een thdi cliim [ = [r ]-0,00-5 (s) ctLo'ng c16 cldng di€n biurg: A.2\,5 (A) 11. -2.,6 (A) C.2 (A) D -2 (,'\) Cau 5f: M6t sdng Am c6 ciang hinh ciiu ciuo-c phiit ra til rnot ngudn didm c6 cOng sLr{t lW (n = -1.14) r'ir giii stL rlng rndi trudng khong hdp tiru iim, t4i ciidl ciich ngudn lrn cti cudrrg dO Am bAng: A.0,8 Wm2 t].0,08 wim'? C.0,04 W/rn2 D. 0,4 Wm2 Cau 54: MOt con lac do-n tleo rr'en tharrg nrtiy clao clOng clidLr hoA chu kj,T khi thang n-rtiy cliltrg yOn. Netr tltang nidy di lOn nhiinh clSin cldu i,6i A = 9 tf.ri chLr k! dao c16ng cira con l5c li: l0 D T"E V9 Cau 55: Mot mach clao ciong LC ciang dao dong vdi chu l<| T, thb'i gian ngin nhat lcd tir lLic nzing ltro-ng tir bring 3 nAiig lLr'o-ng di€n, dOn lfrc nang lLro-rrg di€n bang 3 nitrrg luong tit ll: 'r A 6 CAu 56: Gia toc tiep tuyeir clac tlurrg cho bien dtii A. Phuong'cua gia toc g6c B. Phr-rong cira vAn toc C. D0 ldn cira vAn toc g6c D D0 lo-n cira vAn toc dhi Cau 57: Khi vAt rAn clLray ddu clLranh m6t trurc cd dirrh, rn0t didrn tren vat khong ll-ru6c truc cluay c6: r\. Vdc to \/an toc dr\i bien ddi IJ. DO lcn vAn toc dhi bien ddi C. Vic to vAn toc dli khong ddi D. {)o l6'n vAn toc gric bien cldi Cau 5[i: I(hi nrot ci{i thu'dc chuydn clong theo phLtong chiiiu d:\i cira n6 r,6'i toc dO v, d0 d}i ciia tltrL6c: f) ' A. Ddn ra theo ti re ./f - { Vc' B. Co lai ti le vdi rot do cira rhLLdc C. Din ra phr.r thuOc vi\o toc do cira thrtci'c. D. Co lai tlieo ti l€ CAu 59: Anh sdug hLrjrnh qLlang lt\ iinh siing phdt ciuang: A. Tdn tai rn0t thdi gian sau khi tat 5nh si{ng kfch thich ll. I-ldu nhu tft ngay sau khi tit dnh si{ng kich thich C. Cd bLtoc s6ng nhd hcrn bLtcic s6ng irnh siing kich thich D. Do czic Linh rhd phdt ra, sau khi dtLoc kich tiricli bring 6nh sting thiclr hop CArr 6{}: Ilai dia nim ngang c6 cirng trulc quay. Dra I cr5 r.n6 nren qudn tinh l, quay vrii toc do gdc r0,,. Dia 2 cti tt.t6 tretr c1Lri,'ru tiuh lr, lLic riiiu ciring yen cho dla 2 roi nhe xuOng cila L Do circ mlit ti€! xfrc nh/un u€n cii 2 tila c0 sau khi th6i truo-t tr€n nhau thi c6 cirng rnOt roc do gric ro. '['i so -" lz]: (l)^ ,, [, I, I, t I, r l. D. It l,-r- l. v6 PsaA ( Pagc t /.5 ) DAP Ax ui THr rntJDAr Hoc rAx r MOn : VAt Lli gqtl! ('att -1.? (.lu-tt -i.l t:1!;1q -iJ Cau 35 Trubng THF"[ Chu Van An - FIi Nr)i C'1ity I ('titt 2 ('titt -l ('titr .l Cdtr -5 Cau 13 Ctiu l4 (.';rit t I -i ('titt I 6 ('dtt I ,y' Cuu l8 Cau 26 C-titt 27 ('ciir J1l ('<irt.)() ('dtt -j0 D Cau 43 A A l) c: A A A] C (: (: A A a A !) B A D :l t) (.au 44 ('dtr -/.5 ('_ayt.l1i ll'!,!lt :l ,r' Cau 48 Cau 56 (.au -57 ('_c1y 5,j ('!yt 5!,t (.'att h0 A a B (: B Cau 38 v,fr?ffi; . sau khi tat 5nh si{ng kfch thich ll. I-ldu nhu tft ngay sau khi tit dnh si{ng kich thich C. Cd bLtoc s6ng nhd hcrn bLtcic s6ng irnh siing kich thich D. Do czic Linh rhd phdt. 10*rn/l Sl::1,?X':Jl',T,'lf:9,,'flgg,l,1li'i,.",,* q'ir rr).n ran rr:uv€n s6ng dien.tir thi cii0n trtLd'g bierr thi . vir tir trub.n-e bid#1,iil';;;;0."s;ffiq;il;"i;t,ii,ng. rrro'i cridrn r, ri y. NeLr crru r<j, biin rfr cua chiir 'ph<5ng x;r li r thi so hat nharipharira rr.orrg r,rroa,rg rr,Ji ainn ,, -,,,, A.x-y B.f*-vl$ q.(x-v)i ^