nA m1v,rrf xndr roNC F{Kz 20102011 Ltr.4 Thili gian : phrlt lEinh nglfa dsng lu,omq ori+ _l vt , vi6iUi6u th{rc , ph bi6u vA vi bi6u thrtc dyh lugt b6o tdacr dng Xuqng cho h gdrn 2 vflt ? }Hay,n6u d4c didm ro{tg lgc cfia vtrdn. ffidd c}ro bi6tphuong ptrd.p xdc dnh qng tarer qra vgt rdn phfrng ,,rn6ng ? a 3M0t 6tO ed khdi tusng t500kg da4g chuyn dng vdi vn t v30qs .Xde d{nh : aES biem thi0n tfgng nng crea 6m f nO Ui ngnn fi vn tde tr0ms. blT:fnh lge l1fiA eung blnh ,bi6t nfisg dureg mA 6t6 ehpy chgy o,ug i gi hem l n00ma 4MOt vt.c6 kh6i tqrg 0;S kgduqc tle i ft d0 eno z so v6i m ddt Ei6t eo nng ca v6t trd 100J.ICy g:l0n .Ctrqn gdc ttrd nf;ng tar m6t ddr . dTInIx d cao z.? . bD(da di{rh d0 cao ca vt mA tat dd dg,ng rdrig e6p 3 nfu t}ld rrf,g.? 5 Thd nAol qu6 tirft dfurg nhiet ?Fhat Ul6u va vl6t hi6na tht}e eila dinh ur B6rLqyMari6t ?Ve dflng durg dene nhi€t eong h toa d0 (V) e N{0} he g ma A i=r, :lte .ifu tdc eila r6t , cd d0 6mv13nms vd ed anrng kh6ng di .Vqn tda ctia v0t mrz cd d0 til vz= 2nms vdr ed laury nghi€ng gda 500 so vdi vl :Tim t6mg d0ree lwm:e e0a hP 7eA0t dmnag m6y cO khdi luffmg.m:600kg chuy6m dmg dr6ng dng n€n sm.h : 10mm (kh6mg cd rana s6t ) . T{mh cmg aa =dgpgco dB keo thamg m6yl8m mrie Z rrqnmg fiiW . aThaerg mrdy di 6n th6ng dtu, h ThenE dti dlryn nqaqh de dna vOi a = I nn . Cho g : X0 ms2 . She0t thamh AB: ddllgrchdt c6 trqng lddng F = I0 N v AB = nsm. Tharuh AB ed thd quay xunng quarnh tr trqc nguogWe0 vdi. CIA=30crn. Edu Aa6treclvftrmgFr=30N. tsd quru oa ug t 6o ul f+l riAu B moc v4t mme ed rrqmg truo. ras ? hims roul irae r 9 Cho 2 grarm khf chidrm ttrd mah 4 flit nnniet dO flC . Sau khi mwg ndmg 6Ec 6p c6 ffi6 fiurymg ri€ng eua khfl d t3 il . Tlrn mhift d khf smu khi mung mdmg ? nG d0a hi drdp khdi nnrEng ms u dam6g cd vgm t vs= 3 ams ddu va cfiaErm vo nmr hi uhttry rf,mIa damgdtugy0m cdktaIurqe cmz=riahr.SauvacftWrmhidadydnh ehuydmdmgvdiv6m gdp 3 ndn vm t hi rhdp T3m vm ffi efia eda vi8mbi EErr v ehsnna ? r) p Iy ,t ,a\_ s. PH Bf rsr rlec x{, u (z0rr2012) Ar r,{ ro nrAuc cAo , cAu.r : (r cri6m),,.T,:i ptuole t,t1Xlilli;ffJiilr . H6y suy ra vi chime mi,h r.ang zipsudt cria ch6t khi ph rhuc.,;vio,r0t d6 ph6, trrkhi ? CAU 2 :(1,5 ei63) Yqr6 t6 1,5 tiin chuy6n dgng flrfrng dAu vdi vfln (c 54 krMr. Lgc phrit d0ng c6 ctQ lon brng :|%hqTq luqn8 cfa xe vi coi nliu lgc c6n trlc rrg vdo xe Hrong ;6i klri xe chuy6n dQng. Liiy e= tO gVr{ a. Tinh c6ng ctra luc cfln tr€n qrfirlg rlucmg 500 m. l,: f , gtug uong ttr, n6u xe tit m6y mi kh6ng harn phanh, tinh cfgng nng cfia xe sau khi di th€rn 10 m nifa. { . cAu 3 :(1,5 di6m) a. S1r n.dei la gif Viiit cdng thric tinh chiAu dicfra thanh sau khi bi nung n6ng 6u 16 t6n vi dcm v flmg ctpi hrqng trong c6ng thfrc b. Tpi sao gioa hai thanlr ray thmng sit ntii fi,5n nhau nguoi ta kh6ng d{t chiurg thflt s6t vio nhau mi phf,i chlr.a m6t khe h nh6? e I o MoJ thanh v dyfg;iit dai. 11 T gJ,hieJ q0 ?g c. Tinh xgm ptrf,i chrla rnQt klre h rQng bao nhidtr mm t4 rc,;,a,a,il;d;;,i:;tTr1,?fl Hffl;HxTttrs,itT;itr:rf iffi Hlt,ri cAu 4 :(1,5 cti6m) M6J vfllgeir.hie du6i t6c duns d,itr,};Jf,; il c6 crQ r6n B i Fs : Fr:ttNviF2.Choui6tfirfr v Q a. Emh6yvEh6balucniv. b. ViSt bi6u thrlc vC eidu kiftr c6n bE rg cfia vgt ndy. t. Ttuh F.,. cAu s :1i,s diiim) .ryj9t gglrgthric rinh m6men nglu lpc vd ch6 rhich 16. b. PhAt bi6u quy tic m6men Ivl0tthanh chiin tluong dei 7,8 m, c6 treng lugng210 N ye c6tr9ng6m G c6ch dAu b6ntnii ray t) 1,1 t Thanh nnv rg pg ryuyoiisil;irv nam ngang o cach A 1,6m. H6i ;li? flf;|ffifftrd;aiL:T_tT,i tIc d,ng ,ao .tau uoipriu,ror n1;ilffi rir,ae cAuo:(1,5 di€m)MoJbinhkfnttr6tlch 0,4nf ,chakhie zT
t t \' \, tA -r -^ YA m1v,[rrf xndr roNC F{Kz - 2010&2011 nA Ltr."4 T'hili gian : @ phrlt l-Einh nglfa dsng lu,omq ori+ _l ""'- v$t , vi6iUi6u th{rc , ph& bi6u vA vi& bi6u thrtc dyh lugt b6o tdacr d$ng Xuqng cho h$ gdrn vflt ? }-Hay,n6u d4c didm r-o{tg lgc cfia v$trdn ffidd c}ro bi6tphuong ptrd.p xdc d[nh &"qng tarer qr]a a vgt rdn phfrng ,,rn6ng 3-M0t 6tO ed khdi tusng t500kg da4g chuy&n d$ng vdi v$n t& v 30q/s Xde d{nh : a/ES biem thi0n tfgng n#ng crea 6m &f nO Ui ngnn f$i v#n tde tr0m/s blT:fnh lge l1fiA e'ung blnh ,bi6t $nfisg du® mA 6t6 ehpy chgy &o,ug &&i gi@ hem l& n00ma 4-MOt v$t.c6 kh6i t*qrg 0;S kgduqc tle ft d0 eno z so v6i m& ddt -Ei6t eo n&ng c&a v6t trd 100J.ICy Ctrqn gdc ttrd nf;ng tar m6t ddr dTInIx d$ cao z.? bD(da di{rh d0 cao c&a v$t mA tat dd dg,ng rdrig e6p nfu t}ld rrf,$g.? 5- Thd nAol& qu6 tirft dfurg nhiet ?Fhat Ul6u va vl6t hi6na tht}e eila dinh [u&r B6rLqy-Mari6t ?Ve dflng du&rg dene nhi€t e'ong h$ toa d0 (@V) N{0} he g&* m^a *i=r*, ifu tdc eila r6t cd d0 [6m'v13nm/s vd ed ]anr&ng kh6ng d&i "A V&qn tda ctia v0t mrz cd d0 t&il vz= 2nm/s vdr ed lau&ry nghi€ng gda 500 so vdi vl :Tim t6m-g d0ree lwm:e e0a hP 7-eA0t dmnag m6y cO khdi luffmg.m:600kg chuy6m d@mg dr6ng d&ng n€n sm.h 10mm (kh6mg cd ra-na =dgpg-co s6t ) T{mh c&mg a&a dB keo thamg m6yl8m m*rie Z rrqnmg fiiW a/Thaerg mrdy di [6n th6ng dtu, h/ ThenE *dti -dlryn nqaqh de d&na vOi a = I nn/# Cho g X0 m/s2 S-he0t thamh AB: ddllgrchdt c6 trqng ldd-ng F = I0 N v& AB n&sm T'haruh AB ed thd quay = xunng quarnh tr trqc *&*nguogWe0 vdi CIA=30crn Edu Aa6treclvftr@mgFr=30N tsd ? *i g:l0n# :lte e *, : : qu*ru oa* u&*g t* *6o *ul f+l riAu B moc v4t m$me ed rrqmg truo ras ? r hims roul *irae* r) Iy p ,t 9- Cho [2 grarm khf chidrm ttrd mah flit & nnniet dO flC Sau mwg ndmg 6E$c 6p c6 ffi]6[ fiurymg ri€ng eua khfl [d t3 T'lrn mhift d@ khf smu mung mdmg ? nG &d0a hi drdp khdi nnrEng ms u dam6g cd vgm t& vs= am/s ddu va cfiaErm v&o nm@r hi uhttry rf,mIa damgdtugy0m cdkta&Iur$qe cmz=riahr.SauvacftWrmhidadydnh ehuydmd$mgvdiv6m& gdp il ndn v&m t& hi rhdp "-T3m v&m ffi efia eda vi8mbi EErr v& ehsnna ? ,a\_ s.[ P*H Bf rsr rlec x{, u (z0rr-2012) - \Ar r,{' ro nrAuc cAo cAu.r : (r cri6m),,.T,:i ptuole , t,t*1*Xlill*'i;ffJ*iilr H6y suy vi chime mi,h r.ang zipsudt cria ch6t ph[ rhuc.,;vio',r0t d6 ph6, tr]rkhi ? CAU :(1,5 ei63) t6 1,5 tiin chuy6n dgng flrfrng dAu vdi vfln (c 54 krMr Lgc phrit Yqr^6 d0ng c6 ctQ lon brng lu'qn8 cfa xe vi coi nliu lgc c6n trlc &rrg vdo xe Hrong ;6i klri xe chuy6n dQng :|%hqTq Liiy e= t-O gVr{ a Tinh c6ng ct'ra luc cfln tr€n qrfirlg rlucmg 500 m l,: f *, gtug $uong tt'&r, n6u xe tit m6y mi kh6ng harn phanh, tinh cfgng n[ng cfia xe sau di th€rn 10 m nifa cAu :(1,5 di6m) a S1r n&.dei la gif Viiit cdng thric tinh chiAu d&i'cfra sau bi nung n6ng *6u 16 t6n vi dcm v[ flmg ctpi hrqng c6ng thfrc b Tpi gioa hai thanlr ray thmng sit ntii fi,5n nguoi ta kh6ng -e d{t o thflt s6t vio 'I chiurg mi phf,i chlr.a m-6t khe h& MoJ *v dyfg;iit dai 11 T gJ,hieJ q0 ?g' c Tinh xgm ptrf,i chrla rnQt klre h& rQng bao nhidtr mm t4 { nh6? rc,;,a,a,il;d;';,i:;tTr1',?fl Hffl'';HxTttrs,itT;itr#:rf cAu :(1,5 cti6m) M6J vfllgeir.hi"e du6i t6c dunsvd,i*tr,};Jf,; Fr:ttNviF2.Choui6tfirfr ' - Q - il iffi Hlt*,ri" c6 crQ r6n B i Fs : a Emh6yvEh6balucniv b ViSt bi6u thrlc vC eidu kiftr c6n bE rg cfia vgt ndy t Ttuh F., cAu s :1i,s diiim) r"yj9t gglrgthric rinh m6men nglu lpc vd ch6 rhich 16 b PhAt bi6u quy tic m6men Ivl0tthanh chiin tluong dei 7,8 m, c6 treng lugng-210 N ye c6tr9ng6m G c6ch dAu b6ntnii ray t) 1,1 Thanh nnv rg pg ryuy-oiisil;irv" nam ngang o cach A 1,6m H6i tIc d,ng ,ao tau uoi-priu,ror" n1;ilffi rir,a"e t ;li? flf;|#ffifftrd;aiL:T_tT,i*# A cAuo:(1,5 di€m)MoJbinhkfnttr6tlch 0,4-nf ,ch*akhie zTocvi binh 6p sudtkhi I atn vinhiQt eO A O"C 1,5 atm Khim&nap a/ Timtherich tho6t ru trroiuinr, o ai6u kig, chu6, ? b/ Tim khtii luErg ldli cdn lpi binh ? Bi6r'khd -i' irarrg ri6ng uu'f,ruIluul'ur(l' cfial