<span class='text_page_counter'>(1)</span><div class='page_container' data-page=1>
',
"-v
:-rW
,r,*
.-
; ,:
sG
cncrBT
TiNH
siNH
PHLIdc
x?
rnr
ruyfN
sINH
l,oP
ro
rHPT
crruvtx'quANc
rRUNG xana
qQc,
zott-20r2
Mdn
thi:
VAT
LY
Thdi
gian
ldm
bdi
:
150
phrit
la khdi lugng
cta
quir
t.r
'ii:l
Bhi
1: (2 diem). MQt con ldc dcm c6 chiAu cliii
l:
lm
(khdi
lugng ddy treo kh6ng d6ng.k€),
qui
n4ng c6
kr6i
lugng
,n:
1009 . K6o cho ddy hqP vcri phuong theng dring goc
a:45o
(nhu hinh v€ b6n) r6i tha
tg
do (bo qu3 ma sdt),
'
a. O nhirng vf
tri
ndo con
lic
c6 th6 nang
lclr
nhAI, c6 dQng
nlng
lcrn ntrAt
r
Giii
thich.
b
Hay
tinh
dQng ndng vd tht! ndng
cta
vft
r;Ai
<sub>vi tri A </sub>
vd B qua d6
xic
dinh
vin
t5c cua qua
n4"g
o di6m thAp nhdt.
n:iit:
z
-
Bi€u
thtio
tinh
dQng ndng
cira
con
llc
ld
Wd
:
<sub>? </sub>
<sub>fO </sub>
Trong d6
m
ndng,
<sub>^: </sub>
v ld vdn t6c cua
qui n{ng
tei
vi tri
dant; x6t.
ErAr
,rl,i-ia
,t"fr
tn6
narj"t
"
con 16c ta
w,
:
mgh
(f
.
Lay
vi
tri
cAn
bing B
ldm mdc
tl
r)
ning
(m6c Oe
tinh
c6c dQ
"uo),
.*
le.kh6i
lucrng cua
qui nilrg,
g
= 10 m./s',
h
ld dQ cao
cia
q:1;i
nang tai
vi
tri
dang x6t so
v6i
m6c thti
ning.
iai'2,
(2
di6m). MOt nhiet loq.trg
t6
Uang ,16ng c6 khOi
luqng i00g
dwg
738g nudc
o.nh.it
dO 15oC,
ina,rao
d6 mqt mi6ng d6ng c6
ktt6i luqng
2009 b nhigt
d')
100oC. NhiQt d0
khi
b6t diirt
cO can
bAng
nhigt
la
17oC ( b6 qua trao d6i 'rhiQt
voi
mg! <sub>1ruong) </sub>.
Tfnh
nhiQt
dung ri€ng
cria
ddng,
favJfrlet
dung
ri€ng
cira
nu6c lit4l?6Jlkg.K.
F0'l+
Biri
3: (2 diCm).
Vat
AB
duqc
d{t
<sub>V</sub>
u'udng g6c
r'6i tryc
chinh cria mQt thAu
kirdi
<sub>I</sub>
i;hffri
ki
(nhu hinh
v€.
b€n)
c6
tiOu
cg
i'=
*
(crn).
Ri6m
;\. nam tr6n
tryc
chfnh vd
-
c,6ch-
ouang
..-JA&*'
.A-".-
glQ! elga
*::.
G,rl:
2a {cmS.
a)
HE.y
vd
enh
A'B'
cira
v{t
boi
th6u
kinh da cho.
Tir
B
hf,Y
chri.m tia s6ng qua thAu
kinh.
A
b)
Dichihuy€n
v{t
AB
dqc theo t4rc ch;nh
vi
trudc thAu
kinh
(b6n
tr6i
thAu
kinh).
Em l;;iy
nhan x6t vA
vf
tri
tinh
ch6t cua
itrh
A'B'.
Biri
4: (2 di6m). Cho nhirng dgng cp
sauio,."
|
" '
-
MOt c6i cfin
c6
gi6i
h4n do phir
h{ir,
mQt c6c
(ly)
nudc du dung. mQt
hinh
chia d6
':o
<sub>\ </sub>
<sub>^ </sub>
,
gi6i
hAn
do
100cin3 ho4c lon hon. gi6y lau hr-rlc
khin
lau kh6, birt chi hodc birt
d4.
<sub>"o; </sub>
<sub>/</sub>
15 hdn s6i cung lo4i c6 duong kinh iCroing
lcm,
soi
dl
dugc.rira sach vd lau
kh6.
--
<sub>\</sub>
I{ay
x6c dfnh
kh6i
luqng ri6ng cira nhirng'vi€n
s6i.
},r>--
i
gi,i
<sub>S, (2 di6rn).</sub>
Hai b6ng ddn c6
<sub>qli </sub>
D'!gY:r{}
va.
:l??,sY.-.1,?sw).qYq:
<sub>1; </sub>
-*qa-1--
-micvdomQtngu,5ndiQn'c6hiQudiQnthfiU:9Vcungv6ihai^&CD,
bi6n tro
Rr.Rzih*o
rcr eO
uen
,r
+, ^l
-
R,
L-ff1 -g;if
;;{---l
A
AB
tao
ve
mQt
?)
Eieu chinh
R1
vd
Rz. Tim
gi6 tr1
cia
R1 vd R2 d6 clt':r
E1 vd E2 sang binh thucrng.
b)
Gift
nguy€n
gi6
tri
d6
cira
Rr
v l. diAu
chinh
Rz d0
c'i
gid
ffi
R'2:
1
f).
Khi
d6 dO s6ng cira c6c ddn thay
ddi
nhu thd
ndo so
voi
trubng hqp tr€n?
H6T
</div>
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