<span class='text_page_counter'>(1)</span><div class='page_container' data-page=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
<sub>Lrf </sub>
LoP
to
<sub>-tsAN </sub>
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 trong
thli
gian
45 gi}'y. DQng ntuig cria vfln ttQng vi6n d6 ld:
'
<sub>>( </sub>
87sJ.
g
<sub>560J. </sub>
<sub>NirsJ. </sub>
<sub>Wt4oJ.</sub>
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 0 dQ caolm so voi mEt d6t
v6i
v0n t6c
dlu
2 m/s.
gi6t
kh6i lugng
cria vSt baog 0,5 kg
<sub>&6y </sub>
<sub>e:.10m/s2). </sub>Co nlng cria vflt so vdi
m{t
d6t barg;
{rt
Yot
-@6I.
ilst.
Cao St Khi vfln ti5c cria <sub>--OJ </sub>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$t ffing g6p hai.
CAu 6: Don v! cria dQng luqng ld:
-Sdkg.m/s
pfNm/s.
)K.vr:
Yz:20mls
tffu,
<sub>:20mls )yz:10m/s</sub>
V,N.m.
Ciu
7z MQt vfit chuyi5n,.ilQng
voi
vfln t6c
i
dudi t6c dpng cria COng sufu
cta
lgc
F
ld:
{P:Fvt.
BP:Fv.
E?:Ft.
>{P:Fv,.
Cflu 8: COng thtic tfnh c6ng cria mQt lgc
li:
*t
A_
F.s.cosc[.
' Dfl{:
mgh. <sub>.f{7iL=/2.mv2.</sub>
4A:F.s.
C0u 9: MQt gdu nudc t<trOi tuqmg 12 kg dugc k6o cho chuy6n d$ng ttAu l€n dQ cao 5m trong
khoalg thdi gian
I
phrit 40 giily <sub>GliV </sub>
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 ra thr"fc*riQn"
,
Trang 5/9 - Me AA
tii
ioi
D6nh
df;u
X
SO
Th*Tu
f "+'-teq
rifi.
ig
6*
S0 Phdch
</div>
<span class='text_page_counter'>(2)</span><div class='page_container' data-page=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.
<sub>ffchuy6n </sub>
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 khi
*"0n
tOc cta rr6t
gia*.
Dfvfn
t6c cria
v$ty;
const.
:
.{4 c6c luc t6c dUng 16n <sub>rr6t </sub>sinh c6ng dUong.
[.
c6c ltrc t6c dpngl€n
vft
kh6ng sinh cOng.
C0u 12: Khi vflt chiu t6c dpng cria lgc
din
trOi
<sub>6O </sub>
qua'ma s6t) thi co ndng cria vflt duu. c xdc ttinh
theo c6ng
thrlc:
t
w*L*u'+
I
k.LJ E
Si
lr
={,
*r2!*sr.
Cffu 13: Khi mQt t€n
lta
chuySn dQng'thi
ci
vfln t6c vd t*rOi tuqng cta n6 d6u thay AOi.
ffri
ttr5i
lugng giarn mQt nta, vfln tiSc t[ng g6q hai thi ctlng ndng cria tOnltta:
a.
ftrOng
AOi.
B.
giim
Z
tAn.
C; ttuig g6p Gn. D. t[ng g6p 2 mn.
Cf,u 14: <sub>Qua </sub>eAu
e
mtOi lugng m1 chuySn elQng vdi v$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 2 kg
ru
tU do xuting d5t trong 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
<sub>ry</sub>
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 ra 5cm so vdi
vitri
ban ddu r6i thd nhe nhdng. Co ndng
B.
mri,
= ffiziz
.
<sub>ffirir= </sub>
<sub>+ (m, </sub>+
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
<sub>- </sub>
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
<sub>* </sub>
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 khi ?
{Chiitkhi
e6 tinh dE n6n.
</div>
<span class='text_page_counter'>(3)</span><div class='page_container' data-page=3>
fl^"lalkhi
c6
ttrtii
tuqmg riOng nh6 hon so vdi chdr t6ng ,
gc!ilkhi
c6 <sub>kh6i luqng ri6ng l6n hon </sub><sub>so </sub><sub>v6i </sub><sub>ctr6t </sub><sub>tOng </sub>
.
,
Y!C!:q!e"
fir, khi ludn chuy6n A6ng h6n lopn kh6ng netog .
Ciu22:
N6n khi dnng nhiQt tir the fich
l2ltt
tttin 8
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 trong binh .N6u thc uctr cta khi tE ,e g6p 3
ltu
, cdn nhiQt ttQ,giim tri
mQt nta.thi 6p sudt cua lugng khf ndy s€ :
)egiam dt 616n
,
<sub>V.ta"g </sub>g6p d6i.
.
<sub>EGtrong </sub>
d6i.
<sub>t(ta"e </sub>
<sub>e6p a </sub><sub>Hn.</sub>
cflu 25: MOt kh6i khf dpg.trong binh
kfn
e nhiet dO 670c c6 6p su6t
l,i
it".Ap
suSt khi rong binh 16.
bao nhieu ktri ha nhiet do
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 khi 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 <sub>).D0 </sub>cao cria v0t k*ri th6 nang bang nua d6ng ndng ld :
A.1,45m
<sub>8.1,35m </sub>
-
<sub>c.I,25m' </sub>
-
<sub>D.0,g0m</sub>
cla29z cdc ttlnh luflt ch6t khi chi ctung khi ch6t khi 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
</div>
<span class='text_page_counter'>(4)</span><div class='page_container' data-page=4>
\
C6u 30: Bii5t <sub>kh0i lugng </sub><sub>ri6ng </sub><sub>cua_ </sub><sub>ktr6ng </sub><sub>khf </sub><sub>& </sub><sub>00C </sub><sub>00c </sub>.
vd l,0r.1Ospa le l,zgJ0-3glcm3. <sub>Kh6i lrrgn*-ri.ng</sub>
t\.
I
ct..
)t
cira kh6ng khi O 1000C ,ra Z,OO, l05pa
li
:
A.
nv <sub>I </sub><sub>,87 </sub>.1 0-3glcryn'
/
C. N 0,0255g/crn3. B.
nv <sub>l,8g/cm3.</sub>
D. nv
1,87$cm3
{-o
d
'
uot
<sub>d </sub>
<sub>ru </sub>
kf
^**4'
,,qql*l
tff?
,/"i
/ t
{;Y"L-'o
. I .,t$;
L*-f*
'1.
{
s.
at|
,.,
"Ch[n phEn <sub>mudi c0a </sub><sub>nEn </sub><sub>t6ng thanh </sub><sub>c6ng</sub> <sub>Ie </sub>
<sub>sf </sub>
<sub>ttJtin </sub>
<sub>vir </sub>
dem hdt nghi
lgffin"
</div>
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