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(1)iu ffse sink irsc w ua oufl;Yo}X,::;Xnu:'10
NC (2010 -20,)
MA PHON(
tu
ejig-l: MQt ng6u llrc gdm-hai lpc {
"a 4 c6 F1 = Fz:F vi crinhtay ddn d Momen ng6u lpc nAy li : *.:( l,_- Fz)d B.2F.d c F.d D.Chua bitiid"qff.fri ffi e -'-z "*r
Ctu Z:Trqng tdm cria vflt ran h gi Z - - -r-$-ra"'
M 9ll* ghinh giEa vflt B.La6m d6i xung cta vflr c.Ld di6m.d{t cria trgng luc cira vflt D T6t ci A,B c iau a,ing.
efrgll:This ndng cria tn0t rAt n{ng 2kg & d6y gicn! rdo lilr"-;;i;4t c6t ,tai noi c6 gia t6c g:t0m/s2 la bao
nhi€u?
A.-.200J B -100J c.200J
#'iKS: VI0t vat c6 kh6i luqng I ke roi tu dp rpi ncri c6 g*lOm/s2
A 0,6m/s E.A,Zmls C.g,ghmis
q$S-Si Ftrai vAt c6 cirng kh6i lugng m
,chuy6n dQng voi v4n t6c co ctra h$ hai vat sH dugc tfnh theo cbng thrlc :
D.l00J
t* d0 cao 6m vfln t6c ctia vAt & dO cao Zmla : D.0.4mls
dO ISn bdng nhau v1 : yz.E$ng lugng p
* p = 2mi, B.i = 2*i c.i - *O, *i) D.ce A,B vd c aAu ilung
C.s!r 6: Hai ngucri
\tri-enq mQt cO m6y n{ng 1200N oi6m treo c6 mdy c6ch vai ngudi thr? nhdt 60cm vA c6ch vai ngudi thti hai 40cm .86 qua trgng lugng cria gfly Hoi vai njuli tt,i nt 6i
"friu *Oiru, birgt-;
nhi6u?
A 180N B.72oN c.6o0N D.8ooN
gAg-A Khi c6ng hai lgc sinh cirng khoang thli gian Uing rttu, tfri-'
A E0 lcm cria hai tpc bang nhau n.Cong,i6t
"tu'.[,iie ii;s **
c.-Eucrng di th&i gian
$o c6ng bing nhau n caiadu d A,B,c cfe, d,i"t
-C6u 8: Khi mOt rcil[^ h:l61,uPng tli ce v6n t6c ktriii lusng r,i" no aA, tr,iy aoi
.rcri uroi luqmg giam m$t nria,vfn t6c thay d6i nhu thti ndo ?
A Khdng ddi B.Tdne e6p 4 tAn
C Giam + mn D.Tan-s;do ZAn.
ciu 9: Ph6t bi€u ndo sau d6y ld sai khi nolTa ia June ldm quay vft ?
t yI mQt tay don cho rru6c , lpc cturg lon thi tr,i ta aung iam quay lon
B T6c dUng lnm Qq4V cdng ldm khi crinh tay ddn vi lpc cdng lon. C Tdc dgng ldm qriay cdng l6n khi momenluc cang i6n
, - D Cdnh tay d6n cang lcm thi t6c dpng larn quay cang b6
Cfiu 10:M0t vft rcri kh6ng v$n t6c dAu ttr aO
"uo obm .o6 cao z md t4i il6 dQng nrng bing y3 con6ng td :
A.30m 8.20m C.40m D lom c -: o
CtUll: 'Th6 nang den h6i ld mgt d4i lusng :
A.Lu6n lu6n ducrng
B.Lu6n lu6n duong hoac bang kh6ng
C.C:6 th6 ducrng,6m ,hof,c b6ng kh6ng .
D.Lu6n ludn kh6c ldrdng
C4r ilZ: MQt hQ g6m ha'i vflt c6 khdi tuq,g m1
=3kg ,tn2:2kgc6 vgn t6c c6 vfn t6c v1 =2rnls ,v2 =4mls Bi6t
hai-vft chuydn dgng theo hai hu6ng vu6nglg6c nr,ui .'od too cqrrg lugng
cria hQ rd :
A .!lkgm/s
- .B.l4kgm/s C.t0kgm/s
'
6.gkgJ,
aaq-E: Khi mQt v{t cdn bang mnli ffi trgng tdm th6p ri6t ro vdi c6c vi tri ian can,c6n bang d6ln c6n bang gi?
A.Cen bing b6n B.Cen bang l&6ng bAn
(2)
'-
sa" u: Dudi
'ui^#'rq# T,Y: ,|,kh6ns doi lrat * khdng vfn t6c dAu sau di dusc mQt qufr,g rrucr*g
-
l'fmwd
g.y =W- D.Mot
aao ro r.rra
FF,.
*+lf, M$tnguo'i nh6c mQt vft c6 klg l".*g IOkg l€n dQ cao r* ,5i mang v4t tti
ngangmQt dQ doi 20m 9"_rg *_0"e cQng mi ngudi d6 dA thuc hiQn [
:-A.200J 8.2000J C.t000J D.t00J e ,
c.f,u 16, MQt vi€n tt4n dang bay thang dimg l6n cao v6i ,4"
dr rdd;/s thi n6 hai mdnh c6 kh6i luqmig bdng nhau.Manh I thary drlnsle, rui voi-vAn t6r sooJrld"iO,,irffi z ra ,
A.200m/s .8.300m/s C.tO0mls
D.400m/s CAn 17:Chgn c6u dring :D0lg n,ng cria *Ot riita"e
g6p <t6i khi :
A.m giim n@t nua,v t6ng g6p d6i
B.m khdng.d6i ,v giem cd;mQt nrla
9.* Png gdp.d6i,v gi6m,conm0t ntia
!.-m kh6ng dtii,v tine eepddi
cfiu 18: I(hi c6 mQt lyc t6c dgng vio mQt vft'riin ,y6u ti5 nio ki5 sau cria lgc cd th6 thay d6i md kh6ng ldm_6nh
huong toi tec dgng cua rgc '- )l Av esB vue ruv I A Di0m tlat B.phuong C.ChiAu
D.D6lon
eas 191chqn d6p 6p thing .v6t kh6i llq*g 1009 roi ttr d0 cao zom xuonia7i,"rro g= l0m/s2 .c6ng su6r trung,
binh ctra hqng lgc quri trinh d6 le
A.20w B.t00W C.ISW D.t,W
cflu 20' chqn ttrip rin ttung Mdt vft dang di voi v4n ttSc.l0urlr tr,iie,
d6c nghieng^300 so v6i phuong ngang
.Tinh doan tluong
e!nh6t mi vflt I6n Juqc tren mat Jdc .86 qua *u.,it ,!riom/s2
4.20m B.l0m Cj*r D.7,Sm
Wl:9hqn ddp rin ttung .Khi *0t
".?t ktr6iluqng foog y?lroi'ru do tu dQ cao z =100m xudng d6t ,l,.iy
q:191t' .Donq n6ng cria vft khi & {g cao som ia uao"nrrieuz
a -rvv,r
^uu'g s A 500J B.2s00r c.roooJ - "
D.2sol
c4u22 chqn d6p rln dung MQt con llc c6 chiAu ddi lm .Kdo lQch d6y kh6i phucrng tha,e dtng mQt g6c 600
r6i dri nhe .ffnh v6n tiSc cta con lac khi qua vi tri medttig;h ;;;;dr;; rdlph.rong
rh6ne duns s: r
'm/s?
A.l,9mls B 2,7m/s C.1,7 mls
D.l,lm/s
9ayll chen ddp 6n dring Khi do bi6n d4ng ,y"i eiiooi trti t+re narle ai, llr cira rd xo
:
A Kh6ng.thay d6i B.rane;6o "4"-' ' 'e rE uq, L\
C.Tdng gAp 8 n.ranE iirp z
9*l?.4; c]lgn tlip 6n ttung .M$t vft duo c l*
ll*g drmg rir dg cao l5m (so v6i m4r ddt ) v6i van t6c t gm/s
'Khi the nang vi itQng ndng cria vft bine n!ry trri vit o ao"-.r"la, srr-o#ifno
qua msi sric c6n )
A 12,5 m 8.20m C.l0m
D.7,5m
C"tu 25 Chgn d6p 6n sai :
4.D0ne n6ng ld m9t $et luqng v6 hu6ng ,lu6n duong
I.?Op ndng phir thuQc vdo.h€ qui chitiu
: $? ndng trgng truong phg thuQc mric kh6ng cria thi5 ndng
D.'l'he ndng ld mOt tlai luqng v6 huone , lu6n duonp
c6u 26: chqn d6p to 9]"g .Xe chuy€n tlQng thtuglA, trcn ducmg nim ngang v6i vfln t(:cTzk.n,lh.luc
ma s6t
400N C6ng su6t c,ia ttQnfccl ld : e -' -Q eEvu6'4,'EGrB
A.8KW B.ow c.800w D.1600W
cffu 27:cho.n d6p an ttring .M0t v4t dugc ndm thing iltmg tir mat adi;;t;a" t6c 36 km/h L6y g=l0m/s2.Eo
cao cgc dpi vflt tt4t dugc ld bao nhi6u?
A.36m B.36km C.64,gm D.5m
9a*r:?8 ch-",, qT an-d.ung.T1ong.qu6 trinh nao sau d6y dQ.ng lu'gng cfia 6t6 duqc bdo todn
I ?P 1huvin {gns t8nq.ui6n aoi-adu B.Ot6 ;i,ry6., ddfi"* ffi:-'
9 ^o,: c!u10n dQng trdn ctau D.0t6 rr,uy6o;or,!;a;;5u ,rc, ducrng c6 ma siit
QB.2P:Mric vfrng vang cria c6n b6ng du-o c x6c dinh bdi ;tfrd;8, ffiJi -'
* P? cao cta trsng t6m B-DiQn tich m6t ,nao OB
C.E$ cao cria trqng t6m vd diQn tich cria m{t:chen
d6 '
PPi:"::Iu.{grg tdm.,diQn tfch cria m4t ch6n tt6 vi kh6i tueng crra vflt
cf,.u.3J:Ei6u ki0n can b6ng cria vft ran chiu t6c dgng
",iu rrui luc ld :
A'E-4=o B.F1*F2:0 c.4*Fr=g D.Fr-Fz=0 {:j'',htr-}'t''-t\
'[*'
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