[r]
(1)sd crAo DUC vAEAo rAo LongAn
ni chfnh thr?c
Cf,u I (1,5d): Ph6t bi6u vi chdmg minh dinh lu0t Hric?
DE rcnyr rRA ryac Ki rr NAM HQC20L1,,- 2012
vronr: vdT Ltl6p lb &
Thdi gian ldm bdi : 45 phtit
-wg
.,t f ,1
'a€ ,,
Cfru 2 (l,jd): Vi61
9O1g thyc tfnhlcOng co hsc, s6u rd t6n crla c6c dai lugng tong c6ng thtlc C6ng cria lgc
dugc ggi li o6ngphrit dQng hay cdng cin l*ri nio?
94"_l $,Id): ?h6t bi6u dinh lu4t.S 6c -lo VE duong tlang tfch hQ trrrc tqa d0 O, T) T4r & gen g5c tqa d0 dO thi kh6ng dugc vE ndt li6n?
9?" 4 (1,5.d):,M91 vft c6 ttr6i tuqng z}ls danechuytin ttQng voi v6n tdc 10 m/s thi tang ti5c chuy6n dQng th6ng nhanh aAn 06u vd sau khi t6ngldc di dugc iOm tfri vflt dat vfln t6c 15 m/s Tinh :
a dQng n5ng cfia vflt tpi thli tti6m tnng tdc vd t4i tfrU qi6m vflt rti duo c 10m sau khi tang t5c \
b d0 l6n cta hgp lgc t6c dgng l€n vft 0 qu6ng dudmg tiing ttic rOm tr6n
-Ciu 5 (1r5rl): T,i ryFt d6t, mOt vOj c6 ttr6i tuqng m= 200gdugc ndm l6n theo phuong theng drmg v6i vgn ti5c 30m/s
86 qua srlc cdn cttakh6ng khtvdlAy g: 10ms-2
2 x6c ttlnh rtQ cao crrc Aai fia i6t dpt doq 4t * tt ^ n Tpi vilrf nio vft
"'o
epng nlng b[ng *E
"x,e{di;dinh vfn t5c cria vat tai vi rf tt6 ff - ?l ) fh , Ul,, a.Taivitrlniov6tc6ttQngn[ngbangbatAntfr6n6ng?X6crtinhvOnt5ccriavattaivitrf d6 -/ t'/ t r^.1
Cffu (1,5d:cho.10g
ti,%i,q av y61177nhi9t dO l0oc, ,g,Iti ta ttun n6ng ttdng 6p khtSi diSn t0 lit {'Yt
l fi*r ttrti ti,ch ttrtii tt i truO" ttri tlun n6ng; - \ n
-z-ri^hnhietdOkhSikhisaukhictunn6ngl \
lnU= ll,tf (
^l ,
{0i )T rf&
cia 7 (ltl): MQt oA doqs ch6t c6 khoi lusng I kg MQt aar.o cria r\e" le, # *#r uaoe *-J,
-
' ben 16 (b6 qua ma s6t cria ben lA), cdn dAu A du-ot tiro uio t"Ong.bang*Oirqi d6y AB Thanh duo c gil c6n
rJ J
bdng ndm ngang ve
$e1tre9 hgp vcri mQt g6c a =300 Ldy g: 10 m/s2.Tinh llrc clng d6y vi phan lgc
cria tuong t,5c dgng l6n