SAMPLE
TEST 10.10 FOR
FIRST PROGRESS
TEST
-
SECOND
TERM
-
1OTH
GRADERS
Complete
the passage
with
the correct
alternative
given.
Write the
appropriste
letter
A,
B, C or D
on the answer
sheet.
When'man
first learned
how to make
a fire, he
began to use
fuel
forthe
first time.

realized
that
production
_(24)_
if
coal
was
used instead
of
wood.
Nowadays,
many
of the
huge
factories
and electricity generating
stations
_(25)-to
function
if
there
was no
coal.
In the last twenty
or thirty
years,
however,
the
use
of coal

next
two hundred years
if
our use
of coal
-(29)_,
.
Unfortunately,
however,
about half
of the
world's
coal
-(30) *
Mining
much
of it would
be
very
expensive
even if it was possible
to use new
equipment.
Question
21. A.
passes
B.
used to
pass
C.

doubled
C. will
double
D.
would
double
Question
25.
A.
were
unable
B. would
be unable
C.
will
be unable
D.
are unable
Question
26. A. has
declined
B. will
decline
C.
declines
Question
27. A.
believed
B. is believing
C.

never
be used
D.
may
never
use
There
is one
mistake
in
each sentence
below. Find it
and write the
appropriate
letter
A,
B, C or D
on the
answer
sheet:
Question
31. Erosion,
which
(A)
washes
away valuable
topsoil,
(B)
can
prevent

(B)
much
of a
teenager's tirne
is(C)
spending (D)
chatting
on the Internet.
Question
34.
(A)
For seveml
centuries
(B)
no real changes
(C)
made
in
the
basic
rnethods
(D)
used for printing.
Question
35.
(A)
Huricanes
from
the Gulf
of Mexico

now/faced/
problems/
environment.
Question
37.
erosion/
soil/ result/
when
/
forests/
cut/
carelessly.
Question
38. polluted/
air/ be/
chiefly/
city
problem.
Question
39. plants/
species/
many/
animak/
be/
danger/ extinction.
Question
40.
laws/
must/
some/

Truhrg
THPT
Chuy6n
Khoa
hgc
Tr;
nhi6n
NGAN
HANG
cAu
HoI
KIEM
TRA
C6NG
BANG
LAN
3
-
NAM
Hgc
zoto_zott
MON
vAr
LV
lo
c6u
1'
MQt
tdn
lua

Hdy
xdc
dinh
v4n
t6c
cira
t€n
luu
sau khi
phut
khi?
ciu
2'
MOt
t6n
lua-c6
kh6i
luong
15
t5n
.dang
bay
thing
dung
l6n
cao.
I
.ric
v6n
t6c

einh
van
i6.
.,iu
t6n
luu
sau
khiphet
khi?
ciu
3'
MQt
t€n
lta
ld6i
luqng_2000
kg,yit,ohat
theo
n1"*g
thsrg
dring.
N6.phpt
ra
m6i
giay
m
:
100
kg
khi

MQt
nguoi
c6
kh6i
lqons
m=50:kg
dimg
o dAu
mfri
thuy€n
co
kh6i
lugng
M:
200
kg,
chidu
ddi
6
m
ddu
tr€n
m1t*nyoc
h6
y€n
lpng.
sau
d6
nguoi
di tirdt;;;;;;6;^rh#n,

bo
vd
cra
ngudi
aoi
voi
bo
khi
nguoi
d6
di
d6n
dudi
thuyOn?
CAu
5'
MOt
hat
nhdn
nguy6n
ttr
ban
dAu
dimg ydn
phdn
rd
thdnh
ba
hat:
electron,

vecto
dQng
lucmg
cua
har
nh6n
mdi?
ciu
6.
M6t
vat
ci
t<tror_luTe
50-kg
dat
t16.n
m4t
phang
nghi6ng,
g6c
nghi€ng30o,d6
cao
2m.
Nguoi
ta
kdo
vdt
trucrt
ddu
l6n

m4t pl6ng
nghidng
ld
0,5;
g
:
10
m/s2.?
b.
Tinh
hi6u
suAt
khi
kdo
vflt
trugr
rr-6n
mat phing
nghi€ng?
cf,u
7'
MQt
vi€n
d4n
kh6i
l*q.tg
200 gduqc
tdng
to.
tting

h/c
khf
ch6y
ldm
tdng
r6c
dan?
b.
Tinh
6p
lyc
trung
binh
cria
khi
ch6y
t6C
dung
l6n
dan?
ciu
8'
MQt
vi6n
dan
khdi
luqng
0,5
kg
bay

c6n trung
u;n
cuu
96
l6n
dan?
Ciu
9'
MQt
qui
nang
khdi
lugng
1.
kg
treo
vdo
soi
ddy
ddi
lm,
dAu
kia
cria
ddy
duoc
git
c6
dinh.
Ja1.a,uvc

vfln
t6c
cira quii
ndng
vd
luc
cdng
cta
soi
ddy
<y hai
vi
tri:
a.
O vi tri
ddy lQnh
so
vdi
phucmg
thang
dung
g6c
F
=
300
?
b.
O vi
tri
cAn

cua
ddy,
dQ
gidn
cria
ddy
vd
moi
ma
s6t
Ha'y
tin';a;;;;
ctra
qu6
"nAng
vd
lgc
cdng
cira
scyi
d6y
o hai
vi
trf :
a.
O vi
tri
cdn
bing?
b.

c6
ma
s6t
vdt
chi
l€n duoc
d6 cao
bing
nria
dQ
cao
n6u
kh6ng
c6
ma
s6t.
Hdy
tim
cdng
do
lgc
ma
s6t sinh
ra?
(
i
r* 12. MQt vat th6 trugt tt dinh
m6t mdt bin
cAu nhAn ban kinh 3
i

nhi6u? L|y
g:
10 m/s2.
C6u
13.
Hai vi6n bi co
kh6i lugng
lAn luqt
rnl,rn2,
vdi m2:2mr. Bi hai dimg
y€n,
bi mQt chuy6n
dQng
t6i
v6i vfn t6c 6
m/s
tr6n
mQt
mat
phdng
ngang nhin. Tim vQn t6c ctra
hai vi€n bi sau
va
ch4m
tror.g hai
trubng hqp:
va cham mAm
vh va
cham ddn
h6i truc diQn?

todn mAm.
Tim nhiQt
lugng
t6a
i'a trong
qu6
trinh
va ch4m?
Ciu
16.
Mit
hon
bi
dugc
tha
tir
mQt
vi
tri tren
mdng
cong c6
d6
cao
h:3R
Xu6ng
chdn
m6ng
cong
n6 sE
trugt

di6m
cao
nhat
g
md
khdng
roi thi
phii
thi bi tt
dO
cao
t6i thi6u
ld bao
nhi€u?
Ciu
17.
MQt
thanh
AB
d6ng
cn6t
ti'5t
diqn
dCu
m:4
kg, dAu
B c6 the
quay
quanh mQt bdn
tA

phdn lqc
0 tryc
bdn
16?
Cffu
18.
Mqt
t6m
96
mong
hinh
vu6ng
cpnh
a
bi
kho6t
mQt
mii5ng
hinh
ru6ng
canh
ali.
Hay
tim trong
tdm
phAn
con
lpi cta
mi6ng
96?

gFlp
nhau
cua
hai bi
tr6n
b6n
cAu?
b.
i.'im
v6n t6c
cria hai bi
sau
va ch4m
trong
hai trucrng
hqp:
va cham
mAm
vir va ch4m
ddn
h6i
trgc
diQn?
c.
'iim
d0 cao
cuc dpi
md m6i
Ui
l€n

lQo.
Hdy
x6c
din4
6p
lgc
ctrayat
nine
l6n mdi
m?t
phdng
nghi€ng?
(
Bo
qua ma
s6i,
ldy-g:10
m/s2)
V
V
t\ r-1 ,n f A-^ 2
cau
20'
Mot
vfit
khdi
luqng
1 kg
nim y€n
tr€n

bing
t
thi
g6c
nghi6ng
cgc
dai
bing bao
nhi6u
d€
v6r
kh6ng
bi
rrugr?
cayz!'
c6
5 qui.c*
Sui
lugng
.^.2^,3m,
4m,
5m gin
lAn
luqr
rr€n
m6t
thanh
nhe.
Khoang
cdch giira

C cria
thanh
(AC
:
60crn)
mQt
trgng
v{t
J6
kioi
tnqng
6 kg.
X6c dinh
lgc
ndn
l€n
hai
gi6
dd.
Ciu
23.
Vft
d4ng
trp,
kh6i
lugng
m:
100kg,
b6n
kinh

tren
bAc.
Ciu24.
Qu6
d4n
kh6i
luqng
l0
kg.dang
bay thing
dimg
xu6ng
dudi
v6i
v6n
t6c
100m/s
thi n6
thenh
2
mdnh.
Menh
thri
nhAt
c6
khoi
lusng
6kg
bav
theJphucnig

d0
lcm
lm/s
vd
c6
phuong
kh6ng
ddi.
VAn
t6c vdt
2 co
dQ
lcrn
ld zrrls.
fintr
dO
luqng
cria
hQ
trong c6c
trucrng
hqp,
a.
vt,
v2
cung phucrng,
cdng
chi6u.
b.
\,

dQng
nguoc
chi6u
nhau rr6n
cirng
mQt
qu!
dao
vd
va
cham
vdo
nhau.
Bo qua
ma
siit.giira
c6.c vi€n
bi va
m4t
phing
ti6p xric.
Van
t6J.,i;
"ia;
bi
I la
3mls.
Sau
va
cham

l6n
theo phucmg
thing
drmg
v6i
v6n
t6c
l00m/s.
hoi
mAnh
to
bay-thei
phuong
ndo?
Vdn
t6c
bing
bao
nhidu?
Ciu
28.
Qu.u
datt
kh6i
luqng
2
kg dang
bay thang
dring
l€n

bing
bao
nhi6u?
Ciu29.
Nguoi
co
kh6i
lugng
50 kg
drmg
ydn
tr€n
mdt
toa
tdu
khdi lugng
250
kg
dang
chuy6n
dQng
thing
d6u
trdn
duong
ray nim
ngang
v6i
vAn tdc i
:

c.
{
vu6ng g6c
voi i
Cf,u
30.
Mot q
tO
kh6i
lugng
m
:
lt6n
chuydn
d6ng
thing
dAu
tr€n
m{t dudng
nim
ngang
voi
vdn
t6c 36km/h.
Bi6t
cdng
ru6t.ul
d6ng co
6 t6 la
5kW.

Tinh
cdng
suAt
trung
binh cua
dQng co
O t6
tidn
qudng
ducrng
ndy
vd
cdng
su6t tirc
thdi cua
dQng co
o cu6i quang
ducrng.
Cdu 31.
V4t
dugc k6o
chuy6n
dQng d6u
tr6n mdt
phAng
ngang
ntrO
ly" f'
:
jgN

100g
dang
bay ngang
v6i vAn
t6c
kh6ng
d6i 100m/s.
a'
Vi6n
dan
d6n^xuydn
qua
mQt t6m
96
ddy vd
chui
sdu
vao
96
4cm.Xirc
dinh
luc
c6n
(trung
binh)
cira
g5.
ir,
N€u
tdm

khi. Tinh
^
a.
"
c6ng
sudt cria d6ng co.
ir.
Trgc thdng bay l€n nhanh
dAn dAu kh6ng
vdn
t6c dAu, l6n
cao 1 250m trong 50s. Luc cAn
cua kh6ng khi
bang 0,1
trpng
lugng truc thdng. Tinh
c6ng suAt trung binh vd c6ng
suAt
cuc
d4i cua dQng co trong thoi
gian
tr€n.
Cir:
'i',{
Vat kh6i lugng rrr
:
1 kg
ndm trdqtdm
v6n
ddi n5m ngang kh6i

vOl
tdm vd:
Cffu
35.
r;6t
th6i luqmg 100g
roi tp do kh6ng
vOn
tdc dAu. Ley
g:
10m/s2.
a.
rlao
ldu sau
khi roi vflt
co d$ng ndng
5J? 20J?
b.
;i.r.u khi roi
qudng
duonp
bao
nhi6u, vdt
c6 dQng ndng lJ? 4J?
c.
r
inh v{n t6c
tai thoi di6m
md
W6: 3Wi.

a.
Tirr,,
;X6
bi6n
dpng cira
mdi
ld xo t4i
vi tri cdn bang.
b.
K6*
'
,it
xu6ng
dudi
vi tri
cdn bang
mOt
doan x
=
2cm. Tinh th€
ning cira
hC
tai
vi tri d6.
Chgn
gilr iinh thd nang
t4i vi
trf cdn
b5ng.
Cffu

cua kh6ng
khi
n _
-
n
a.
Tinh t6c
;10
cria
qud
cAu bi6t
a =
300, 600
vd
tdc
d0 cuc d4i cua
qudr
cAu
khi chuy6n
b.
uon?rnn
luc cdirg ddy
bi6t
a:300,600
vir lr,rc
cdng
cgc
dai cua
quA
cdu

k:0,*1.
Dtutdinh
luit bio
toirn
ndng lucrng, tinh
gia
t6c
cta xe tr6n d6c vd
cniAu
Aai
ddc. L6y
q
:
l_0,!t'
. . !. .
Cffu
39.
QuA
cAu thf
nh6t.
c6
kh5i
lugng
mr
=
3
kg chuy€n.dQng
voi
vin t6c
1m/s

hdi
(va
chpm
mAm).
Tinh nhiqt lugng
tba
ra trong
va
cham,
coi
l
rang toan
od
nQi ndng
cua
hQ dAu
bi6n
thanh
nhiet.
Cfiu
40.
dua
"Au
.O t
frOi t,rqg
m =
50g
g.in vdro
ld
xo

qud
cAu
t4i
vi tri
cdn bang.
b.
Tim
d0
gi6n
cgc
dai
cua
lo xo
trong
qu6
trinh chuyOn
dQng.
Cflu
41.
MQt
nguoi
dimg
irn o
vi dQ
600
cria
Trdi
dAt co dQng
lugng v6i
d0 lcm

Chu
42.
MQt
v4t roi
tg-do
vdi
vfln
t6c ban
dAu
20 nt/stir
dO cao h
so
vdi
g4t
dat
Tim
h
dd
dQng
lugng
ctra
v{t lirc
ch4m
Aat
g6p
3
lAn
dQng
lugng
cria

lcrn bang bao
nhi6u,
hufng
nhu ndo
?
^r-A
t^)
^.a^,
l^:: ,^^A,^ I.', I n f A^ 2
Ciu
44'
MQt
lsc
96"9
doi
60
N
tang
t6c
cho-mQt.vQt
n4ng
5
kg,chuyen
dQng
thing
tu
t6c
d6 2
m/s
tdi

cao
xu6ng,
hic
cham
m6t
nudc
c6 v6n
t6c
25
m/s.
unuyen
dong
o trong
nudc
dugc
3 s thi
drmg.
Tinh
lgc
trung
binh
do
nu6c
t6c
dung
l6n qud
b6ng?
c."i4q'
IvlQtchitic
xe

Ti;-il.
;;g
binh
tdc
dung
l6n
xe
trong
thoi gian
n6i
tr6n
?
Ciu
47'
MQt qud
b6.ng
ryng
0,3
kg
chuy6n
dr6ng
tr€n
m6t
duong
thing
vdi
v6n
t6c
5
m/s

la
0,05
s. Tim
van
toc
cua
qu6
uong
nguy
sau va
cham
vdi
tuong?
,C^"" 1s' .
MQt qud
bolg
th6p
ndng
0,3 kg
va
ch4m vdi
buc
tucrng
vdi
tdc
d9 10
m/s
o
g6c
600

do
tucmg
t6c
dlrng
l6n
qud
b6ne?
,C^"" 19.
"
MQt
qudb6ng
th6p
nSng
0,2
kg va
cham
,roi
bit"
i"^"n*
uol
to"
ad
ro
m/s
o
g6c
300 so v6i
!C
mat
cria

tiung
binh
do
tuong
t6"
dung
l€n qu6
b6ng
ld
bao
nhiOu?
Cfiu
50.
M6t
quA
b?ng.niLg
1
,0
kg va
cham
voi
sdn nhd
voi
t6c
d0 4
rrls
cr
g6c
450
so v6i

siin nha
tac
apng
tcn
qia
Uoig
1it
S,i7N.
Tinh g6c
e
c6
mi qud
b6ng
bQt
ra?
Ciu
51.
MQt
qui
b6ng
chdy.ndng
0,15 kg
bi
ndm
vdi tdc
do 40
m/s.
Sau
khi
bi cAu thu

t6c
dgng
l€n
qud
b6ng
ndng
2
kg
bicn
d6i
d€u
tu
0 d6n 4
N.
Trong
I
s ti6p
theo
lgc
ndy
giir
gi6
tri 4
N vd
giAm
vA
0 trong
2
r.
Xung

4 N.
Trong
1
s ti6p
theo
lg.c
ndy giir
gi6
tri
4
N vd
gi6m
vd
0
trong 2
s. Ndu
tuc
AAu qud
b6ng
chuy6n
dQng
theJ
truc
0x
v6i
t6c
dO
-
2
m/s thi

MQt
ddng.co
diQn
cung
cAp c6ng
suAt tSrW
cho
I
cAn
cAu
n6ng
vdt
l000Kg
chuy€n
dQng
cl6u
l6n
cao
30m.
Ldy
,g:lOm/s2.
Thoi
gian
de thr,rc
hi€n
c6ng
viQc
d6 ld
bao
nhi€u?

mflt
d6t
tai
noi c6
gia
t6c
g:l0m/sr
ld
bao nhi€u
khi
chon g6c
th6 ndng
tai
nl4t aAtZ
CAU
58.
MQt nguoi
kdo
m$t
hom
gd
trucrt
trdn
sdn nhd
bang
1
ddy
hqp
vdi
phucrng

LAy
g:1Om/s'.
86 qua
sfc
cdn.
Khi v0t
di
duoc
8m thi dQng
ndng
cria vAt
c6
gi6
tri
bing
bao nhi6u?
9au.90._MQt
gdu
nu6c
kh6i
lugng
1.0 kg
dusc
k6o d6u
lCn.uo
5*
trong
kio6ng
thdigian
I

va cham
vdo
m6t
bric
tulng
thing
dimg theo
phuong
lu6ng g6c
vdi
tucrng,
Sau
va
cham
v4t
di
nguoc
tro lai
theo
phucrng
cfi
voi vAn
tdc 2 rnls.
Thoi
gian
tuong
thc 1d0,2
s. Luc
F Co
tucmg

tdc
gdp
3
lAn
vdn
t6c cua
bi
th6p,
kh6i lu.ng
bi thdp
g6p
3 l6n
khOi tuqng
bi thuy tinh. VQn
t6c
cua mdi
Ui
,uu
uu
cham
ld bao
nhidu.
Ciu 63
Mdt con
ech
kh6i lugng * ng6r
d dAu mdt t6m
vdn
kh6i
lugng

f
ftu
64, MQt tOn
lua
g6m
v6 c6
t<hOi tuqng ft10
:
4 tAn
vd
khi
co kh6i
luqng m
:
2
tAn.
TCn lua
5;
,,;
bay v6i vdn
t6c vo:
100 m/s thi
phlrt
ra
phia
sau tirc thdi
khdi luqng
khi noi trdn.
Tinh vdn
t6c

v1
:
400
r,
: ,n/s.
Hoi mAnh to
bay theo
phucrng
ndo
vdi vdn
t6c
bao nhi6u?
86
qua
sfc cdn
cria kir,\
,F:
khi.
Ciu
6{r,
Mqt
khi cAu c6 kh6i luqng M
:150
kg, treo
m6t
thang day kh6i
lugng
kh6ng d:,rii: k6, trdn thang c6
mQt
nguoi khOi luqng

vd ngudi d6u
dirng
ydn
trOn nu6c
y6n
l[ng.
Ngudi di v6i
':An
t5c dAu ttr dAu ndy
d€n dAu kia cia
thuy6n. Bo
qua
sfc cdn ctra
!,h6ng
khi. Xa'"
:tinh
chiAu vd
d0 dich
chuy0n cta
thuydn.
Cffu
68. Tir mr)1 tdu chi6n c6 kh6i lugng
M

400 t6n dang
chuy6n d6ng
theo
phucrng
^
. .1

69.
MQt t6n lira kh6i lugng 12 tdn
duoc
ph6ng
thang
dimg nhcr lugng khi
phgt
ruphia
sau
v6i
v4n t6c
y
:
1 km/s
trong
thdi
gian
tucrng
d6i dai. Tinh kh6i lugng khi
md t6n lua dd
phqt
ra trong I s
d6 cho tdn
lua
d6:
a) Bay l6n r6t ch{m
b) Bay
l6n v6i
giat6c
a

tdc v2:2ttils. Gi6 thi6t
b6
qua
ma s6t.
Tinh v{n t6c
cira toa
godng
sau khi
nguoi do nhiy l6n,
n6u ban dAu
toa
godng
vir ngudi
chuy6n
dQng:
a) Cung chi6u
b) Nguqc
chiAu
C6u 71. MQt tOn
lua kh6i lugng t6ng
cQng m:
I tdn dang
chuy6n
dQng theo
phucrng
ngang vdi
v4n tdc v:200 m/s
thi d6ng co ho4t
dQng.
Tir trong t€n lira, mQt lugng nhi€n liqu

100 kg t6ch
ra khoi t6n
lira, v6n
chuy6n
dQng theo
hucrng cfr
vdi v$n t6c
giAm
con
1/3. Tinh
vAn t6c
phdn
con
lai cria t6n ltra.
Chu
72.
MQt vi6n dgn
ph6o
dang
bay
ngang
v6i
v4n
t6c vo
:
25 mls o dQ cao
h
:
80
m thi n6, vd

^f
,4 t :
Cf;u
73.
MQt
vi6n
dan
kh6i
lugng
l0
g
dang
bay voi
v6n
t6c
600
m/s
thi
gap
m6t bric
tuong.
Ean
xuy€n qua
tudrng
trong
thdi
giur,
;!s.
Sau
khi

bay
v6i
vpn
t6c v
:
20 m/s
thi
dpp
vdo
bric
tuong
thing
dimg
theo
phuong
nghiOng
m6t
g6c
a so v6i
mdt
tucrng.
,
Bi€t
ring
v6n
t6c
cira qua
b6ng
ngay
sau

tubng
n€u
thdi
gian
va
ch4m
la
a/=0,5s.
X6t
trucrng
hgp:
a)
a=300
b)
a
=900
Ciu 75.
T?i thdi
di6m
ban ciAu,
mQt t6n lira
kh6i
lucmg
M c6
vdn
t6c
v.
Cho
bi6t cu
cuji m6i

gidy,
bo
qua
inh hucrng
cia trong
luc.
Cfru76.MQtqudcAunh9ddnh6ichuy6nd6nggiirahait6mthdplcrrrd4t
song
song
vdi
nhau.
MQt
trong
hai
t6m th6p
d6 nim
c6 dinh,
con
tAm
thu
rrR
hai
chuy6n
dQng
voi
vdn
toc
u huong tdi
t6m
thri nhAt.

1
thdp
nhu
hinh
v6. Bo
qua
su thay
AOi van
t6c cua
qud
cAu
do t6c
dung cua
-
trong
luc.
Ciu
77. Thd
mQt
con
lic don
chuyiSn
d6ng
tq do tu vi
tri md
d6y
hqp
v6i
phumg
tling

duong
th6ng
nim ngang
v6i
vdn
t6c v.
Eo4n dudng
ndy duoc
n6i v6i
m6t
doqn
dOc rOi
n6i vdi
mdt
doan
ducrng
thdne kh6c
c6 dAt m6r
qua
cAu thu
hai
dimg
y0n
thOi
tuqng
M, hai
doan
c6 dQ cao ch6nh
nhau ldr
H. Hdi

79. M6t
xe 16n nho
khdi
luqng m
=
5 kg chay
tr6n ducmg
ray
tu trang th6i
nghi, thopt
dAu tr6n m6t
doan nim
ngang BC
=lm,
sau
d6 theo mQt ducrng
cong CD l6n cao.
Xe chiu
t6c dgng cua mdt luc
kh6ng
d6i ,F
=120N
cung chidu vdi chuy6n
dQng.
a) Tfnh
dQng ndng cta
xe tai di6m
C.
b) Tim
dQ cao cuc

kh6ng
dring k€ vit
qua
mOt rdng roc nhu hinh v€.
Vat A
d trOn
mqt
phang
nghi€ng
d
=3A"
IJ
s,'
vdi
phucrng
ndm
ngang. Tinh cdng cria trong lgc cua
hQ v4t
khi v{t A
di
chuyCn
trdn mdt
phdng
r,1rhi€ng
ducyc m6t
quang
ducrng
(.=2m
vd v6n t6c cria
m6i v4t

Dirng
dinh ludt
b6o
todn ,'iing lugng tinh
gia
t6c m5i v4t
vd
suy
ra v4n t6c m5i vat
sau khi
chuy6n dQng
mQt thdi
gian
t=4;
CAuS.\." V4t
trucrt tt dinh d6c xu6ng
mat
phing
nghi€ng AB
vdi
goc
nghiOng a=30o
so
vcri
':
phucmg
,-im
ngang," sau d6
ti€p tuc chuydn d6ng
theo

phdng
ngang BC.
m
Ciu
83. MQt sr,,,i
ddy cimg vd m6nh
dugc
u6n
gdp
thdnh hai
doan vu6ng
goc
vdi nhau vd,'ir.roc
giir
cO Ainn sao
cho
mQt doan
nim thang
dimg
vd m6t doan nim
ngang. Tr€n
x' I
'
r'r
ii mQt 6ng nh6
khOi luqng
m.
Cdc
6ng dugc n6i
vdi

ma sdt,
hdy tim
v4n tdc cpc dpi cira m5i 6ng.
Cffu
84. MQt vi6n
bi kh6i
lugng m
ldn kh6ng
v6n t6c dAu
kh6ng
ma s6t tir
di€m
A c6 d0 cao
h dgc theo
mQt dutrng
cong
n6i
v6i
mQt hinh
tron
b6n
cho OM
t4o
vdi
phucrng
thdng
dimg
mQt
goc
d

md
m2 eo
th0
len dugc.
Ciu
86.
Cho
hQ
nhu hinh
v€, v6t co kh6i
lugng
m=2kg,
g6c
a=3A0,
I6y
g
=I\m
I
s',
luc k6o F c6
phucrng
ngang
rdng
roc co
khdi lugng
khdng
dang
ke. Tinh
F
dg

86)
d
Cffu
88.
Thanh
BC
c6
khdi
tuong
m:
6
kg
,
dAu
C nim
tr€n
sdn,
ddy
AB
c6
phucrng
ngang, g6c
a
= 600.
1)
Tim
c6c luc
t6c
dung
lOn

chiec
thang
AB
nang
10\6
kg tr,ra vdo
tucrng
vi
hqp
v6i
sdn
nhd
mdt
goc
d
=
600
. Gia
su ma
s6t
giira
thang
vd
tucrng
kh6ng
dang
k6,
gita
thang
vd

Van
t6c
vi€n
d4n
khi ra
khoi
ndng
sring ld
v6
:
600
m/s.
Tim
v6n
t6c
cria
s&ng.
Cf,u
91. Hai
toa
tAu
chuyOn
dQng
nguqc
chi6u
c6 vAn
t6c
ld
yr:4mls
vd

80 kg
cho m6t
ngucri
co
kh6i
lugng
m2
:
50 kg,
xe
dang
chuy6n
dQng
vdi
vdn
tdc v
:
3
m/s
thi nguoi
nhdy
rakhoi
xe.
Bi6t
v?n
tOc
ntray
AOI vOi
xe ld
vs

nl1
:
0,1 kg
chuy6n
ddng
vcri
vdn
tdc v1
:
l0
m/s dtin va
cham
vdo
mdt
hon
bi thri
hai
co
kh6i
lugng tr12:0,2
kg.
Sau
va
cham,
hon
bi thri
nhdt chuy6n
d6ng
nguoc
chiAu

ldm
hai
mAnh. M6nh
thri
nh6t va
thf hai
chuy6n
dQng
hqp v6i
phucrng
thing
dimg
l6n lucrt
c6c
goe
d
=
300 vit
p
=
6go .
a) H6i
kh6i
lugng
cta
cdc
mdLnh. Bii5t
mAnh
thri nhAt
c6 vAn

ti6n lai
gAn
nhau
cho
d6n khi
ho
ch4m
nhau.
Hoi ngudi
40
kg dd chuy6n
d6ng bao
xa.
Cffu 96.
M6t
qu6
bong
d6 c6
kh6i lugng
400
g,
chuy6n ddng
v6i
v4n
t6c
l0 m/s
tr6n m6r
sdn nim
ngang
d6n va

phucmg
ngang
m6t
g6c
a
=
6A0
Ae teo
mQt v{t
cO
kh6i
lugng
m:1kg.
Tinh
c6ng
md
luc dd
thgc hi€n khi
v4t d4t
duoc vdn
t6c
v:2
m/s,
ciu
98. Treo
mdt
vflt nflng
viro
mQt sqi
ddy ddi l:50cm

hai
minh.
Manh l6n,
chi6m
60%
kjrrdi luqng cria
qud
lgu
d4n, tirip
tpc
bay theo
huong
cfi nhrmg vdi
vfln
t6c 25
m/s. X6c
dinh v{n
t6c
ctra
m6nh
thir hai.
cau 100.
MQt v4t
khoi lucrng
m:2kg
rcvi tir
d6 cao h=40cm
xu6ng
m6t lo
xo