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(1)S# GD-ST Long An
TR{IONG TIft'T Chm Giur$c
l^x
I flE KlEilrSRA TAP TRUNG NAM HQCI2012-2813
MON: Yg,T Lrf LoP to -tsAN c0uAu
"Thdi gian ldm b:dti 45 phrit, kh6ng kA thdi gian giao dA
P(N/s'
-?
lgc F kh6ng d6i
7p
s.'
Y ,/
DE CHII{TI TT{IIC
Mfr d0:361
.A S'Yqrq*j
Cffu 1: MQt vflt ttrOi tuqng 1,0 kg c6 th6 ning Z,0l d6i vdi mit Aiit.l-dy g:9,8 m/s2 Khi d6, vflt
''
u
$/3'i'0, * fi1,0 m, d o,zo4 m Xe,B m
Cda 2z MQt vfln ttQng vi6n c6 t<tr6i tuqng 70kg dtr4y dAu hiSt quang etudrng l80m thli gian
45 gi}'y DQng ntuig cria vfln ttQng vi6n d6 ld:
' >( 87sJ g 560J NirsJ Wt4oJ.
Ciu 3: Ctri6c xe chpy t6n dudng ngang vdi vfln tdc 20mls va chAm m€m vio mQt chii5c xe k*r6c dang drmg y6n vd c6 crlng t<tr5i tuqng gi6t va ch4m ld va chpm mdm, sau va ch?m v6n t6c hai xe
la:
fftl: Yz= 10m/s
CAu 4: MOt vOt duo c n6m l6n dQ caolm so voi mEt d6t v6i v0n t6c dlu 2 m/s gi6t kh6i lugng
cria vSt baog 0,5 kg &6y e:.10m/s2) Co nlng cria vflt so vdi m{t d6t barg;
{rt Yot -@6I ilst.
Cao St Khi vfln ti5c cria OJ rAt teng g6p b5n, ttrt
A etQng luqng cria vflt tdng g6p hai - B elQng ntrng cria vflt t6ng g6p b6n $ dQng ndng cria vft ting g6p mudi s6u O tfr6 nlng cria v$t ffing g6p hai CAu 6: Don v! cria dQng luqng ld:
-Sdkg.m/s pfNm/s.
)K.vr: Yz:20mls
tffu, :20mls )yz:10m/s
V,N.m.
Ciu 7z MQt vfit chuyi5n,.ilQng voi vfln t6c i dudi t6c dpng cria COng sufu cta lgc F ld:
{P:Fvt. BP:Fv. E?:Ft. >{P:Fv,.
Cflu 8: COng thtic tfnh c6ng cria mQt lgc li:
*t A_ F.s.cosc[ ' Dfl{: mgh .f{7iL=/2.mv2. 4A:F.s.
C0u 9: MQt gdu nudc t<trOi tuqmg 12 kg dugc k6o cho chuy6n d$ng ttAu l€n dQ cao 5m khoalg thdi gian I phrit 40 giily GliV g: l0 m/sz) COng su6t trung binh cira lUc k6o ld:
{.sw Xsoo w ( sow p.6w.
"Chfn phEn mUdi c0a nEn ting thinh c6ng ti srJ tt/ tin vi dem hdt ngh! lt/c thr"fc*riQn" , Trang 5/9 - Me AA tii ioi
D6nh df;u X
SO Th*Tu
f "+'-teq
rifi
ig 6*
S0 Phdch
(2)Cf,u 10: Tlong c6c cdu sag ddy cdu nlo li sai? D.OnF ndng cria vflt kh6ng eOi Wri vflt i #chuy6n itQng co.ng et6y ffchuy6n ctQng trdn d6u
i( chuy6n dQnE thirig dAu lD+chuy6n dQ"g vdi gia t6ckh6ng d6i
Cflu Ll: DQng n[ng cria mQt vat ffing
*"0n tOc cta rr6t gia* Dfvfn t6c cria v$ty; const :
.{4 c6c luc t6c dUng 16n rr6t sinh c6ng dUong [ c6c ltrc t6c dpngl€n vft kh6ng sinh cOng
C0u 12: Khi vflt chiu t6c dpng cria lgc din trOi 6O qua'ma s6t) thi co ndng cria vflt duu c xdc ttinh
theo c6ng thrlc: t
w*L*u'+ I k.LJ E
Si lr ={, *r2!*sr.
Cffu 13: Khi mQt t€n lta chuySn dQng'thi ci vfln t6c vd t*rOi tuqng cta n6 d6u thay AOi ffri ttr5i lugng giarn mQt nta, vfln tiSc t[ng g6q hai thi ctlng ndng cria tOnltta:
a ftrOng AOi B giim Z tAn C; ttuig g6p Gn D t[ng g6p mn
Cf,u 14: Qua eAu e mtOi lugng m1 chuySn elQng vdi v$n tOc i, va ch4m vlo qui cAu B t<*r6i tuqng
m2 d(mg y€n Sau va chgm, ci hai qui ciu c6 cirng vfn t6c l Ta c6:
A ffitVt = -ffizVz
C, mri, = (mr + mz)i,
C0u 15: MQt v$t c6 khdi lugng kg ru tU xuting d5t khoang thdi gian thi6n <tQng luErg cua vflt fiong k*roing thli gian tt6 li bao nhi6u ? Cho g: 9,8 m/s'
4 A 9r8 kg.m/s B 10 kg.rn7s C.4,9 kg.m/s D 5,0 kg.m/s Cf;u 15: Chgn c*u.9,zr-dr6-nfurg c*a hrroiTg tupiig lirp uo Ui6u
fmc=-A Wt:mga B Wt:mg(4-z) C Wr:mgh. Cfiu 17: Chgn cdu,sai:
}(co* thrlctinh th6 nrng dan hdi ry
fl)n|nrng Aan ndi phg thuQc uao eQ'.,ing cla vflt dnn hdi K m6 n[ng'dan trdi t<trOng phu thuqc vdo chi€u bi6n dang
B COng thric tinh ttriS nang Aan nOi kN'.
nh6 khOi tuqng m : l00g giin vdo dAu m6t ld xo Aan nOiqO dQ cung k : 200
C0u 18: MOt vOt r
N/m(ktr5i lugng l$6ng ril*ng k6), diu kia cria tO xo dugc gan c5 dinh He duqt\d{Lr0n mQt mat
phdng ngang ktr6ng mi s6t K6o vflt gi6n 5cm so vdi vitri ban ddu r6i thd nhe nhdng Co ndng B mri, = ffiziz
ffirir= + (m, + mr)i,
D /,
cria h0 vat tai vi tri d6 li:
A 25 10'2 J B 100.10-2 J c 200.10-2 J
0,5s D0 bi6n
D Atz: mg(21 - zz)
D 50.10-2 J
,
ndng stng, dAn c6 vfln t6c
f) 6mls
Ciu 19: Va chpm nio sau tHy l| va cham m6m?
$" Vi€n d4n xuy€n qd6 mQt tim bia fipn ctuong bay cria n6
E Vi6n ct4n <tang bay xuy6n vio vi nim gqntrong bao cdt S Qua b6ng dang bay tlfp vdo tudrng vd niy ra
X Qua b6ng tennis etflp rui5ng sdn thi d6u
C0u 20: fh6i toq * rG fa +tg vi cria itan ln 50g Lric tho6t kh6i
800m/s Van tOc giflt liri cria sfng td:
A l0m/s B.7mls C lZmls
Cf,u 2L:NQi dung nio sau ttdy khdng phf,i ln tinh ch6t cria'ch6t ? {Chiitkhi e6 tinh dE n6n
(3)fl^"lalkhi c6 ttrtii tuqmg riOng nh6 hon so vdi chdr t6ng ,
gc!ilkhi c6 kh6i luqng ri6ng l6n hon so v6i ctr6t tOng ,
Y!C!:q!e" fir, ludn chuy6n A6ng h6n lopn kh6ng netog
Ciu22: N6n dnng nhiQt tir the fich l2ltt tttin tit tt i tu tTriiy ap sudt tAng mQt lugng b6,g
48kpu Ap su6t ban itlu cria.khf ld :
ciu 23: HQ thrlc ndo sau cldy phri hqp vdi qu6 trinir oang nilQt q' W.PrU = PzVz
{'44 = PzT,
DD
g.a=2
'V, V,
DD
xt=t
9Z:?!,99 i0, yams $ Aqq binh N6u thc uctr cta tE ,e g6p ltu , cdn nhiQt ttQ,giim tri
mQt nta.thi 6p sudt cua lugng khf ndy s€ :
)egiam dt 616n , V.ta"g g6p d6i EGtrong d6i t(ta"e e6p a Hn.
cflu 25: MOt kh6i khf dpg.trong binh kfn e nhiet dO 670c c6 6p su6t l,i it".Ap suSt rong binh 16
bao nhieu ktri nhiet
d6n27o-A.0,68affn B.4,Zatm C.l,9Z atm tl,S ut n
ciiu 26:M0t xi-lanh q6 th6 fich 2 lit.,chua o nic cd 6p su& ram Nguoi ta nung n6ng klri ctiSn
_^#.lQo atm ! )(,81 arn e0,45 atm g4,22 atm cfia}TzEuong bi6u di6n nair sau d6y khOng phni ctia aeng qua finh
C
;
C.Au
?s]YQt vit <t1vc ndm t4i mEt d6t, ftFg a*g.l6n cao vdi vfn t6c 9mls ,cho g=l0m/s2( b6 qua lrrc can cua k*rong l&f ).D0 cao cria v0t k*ri th6 nang bang nua d6ng ndng ld :
A.1,45m 8.1,35m - c.I,25m' - D.0,g0m
cla29z cdc ttlnh luflt ch6t chi ctung ch6t khio s6t ld:
firkhi tro' X tt i don nguycn tii- V.khi litutug / fixatc6 kh6i luqng ri6ng nh6 mudi crja nEn t6ng thinh c6ng li sr/ trf t
TrangTl9 - Me d6 thi 361
(4)\
C6u 30: Bii5t kh0i lugng ri6ng cua_ ktr6ng khf & 00C 00c
vd l,0r.1Ospa le l,zgJ0-3glcm3 Kh6i lrrgn*-ri.ng
t\ I
ct
)t
cira kh6ng O 1000C ,ra Z,OO, l05pa li :
A nv I ,87 .1 0-3glcryn' /
C N 0,0255g/crn3 B
nv l,8g/cm3.
D nv 1,87$cm3 {-o d '
uot d ru kf
^**4' ,,qql*l tff?
,/"i
/ t {;Y"L-'o
I ,t$;
L*-f*
'1
{
s
at|
,.,
"Ch[n phEn mudi c0a nEn t6ng c6ng Ie sf ttJtin vir
dem hdt nghi lgffin"