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(1)BE TEXI ErgC Kt 2 NANI X{QC 2013 - 2014 naOm vAr lI- L(FF to rEAroG cAo
Thdi gign: 45 phrtt " ,
Cffu 1:(1,0 Aiem; Cho bii5t nhu thii ndo ld b"i6n aqngco cta vdt.rfin? So srinh sg kh6c
gita bi6n dang co vdr sy n6 vi nhiOt crp v{t rfuy ? Dinh nghia su n0 dfl{ va vi6t c6ng thric ? Ciai
thfch tpi giiia ray d&ong sit nOi 1i6n nguOi ta kh6ngtfit chring s6I ?
Cfiu 2: (1,5 di6m) e ' -. o
a Vi6t bi6u thric tinh c6ng trudng hgrp t6ng qu6t ? I(hi nio thi cdng cria mQt l*c c6 giit tri
ducrng? $hi ndo thi cdng,cria mQt lgc c6 c6ng 6m ?
b cong cria ngira k6o xe vi clia xe kdo ngua ld c6ng duong hay dm?
c Khi k6o vflt kel
ryql$opn dulng,s nh6t d!nh, git cho cdng A khOng thay ddi vd mu6n giem
lyc kdo thi c6n chri y eti6u gi nhu th(S ndo ?
Cflu 3: (1,5 di6m) MQt l6c cton gdm sqi ddy dni 50 cm vi vflt nh6 4009 rreo dAu d6y
Kdqvftnh6sao9hosOiddyhgpvdiphuongthAngdringmQtg6c600r6ittarng .L y g:10 Em hdy n6i16
-d.q"e nflng, thiS nEng vi co ndng cria v4t nh6 bi6n dOi nhu th6 ndo
v4t cti tir v[ tri cao nh6t rt6n vi tri th6p ntr6t t
b/ Tinh dQngnlng cria vflt taivi txi thdp nhdt .t
C4u 4: (1,5 iti6m)
a VitSt bi6u thric iilrn e6"g lugng? Gqit6n vi dcrn vi cdcd4i tu-ong bi6u thric?
q ryft y0t nhO kh6i tuqn eT.ketruqt xu6ng mQt d6c nhEn, t4i mQitfrOi Ei6* x6c dinh c6 v4n t6c 3m/s, sau {6 4s c6 vgn tdc 7m/s Tinh <tgng lugng cria vflt tirippgay sau d6 3s?
9?u,5j (1,5 eti6m) MQt qui d4n 1,8kg tlang biy tna"g dring len cao voi vfln tocz,+onls rhi n6 thenh hai minh , mirnh thir nh6t c6 khSi [ons - lkg bay xi6-n ten v6j v4n tbcZ40m/r tt *
phuong lQch inQt g6c 600 so v6i dutrng ttrfing-OmJ '
al vc c6c vecto dOng lu-o ng ?,ff,ffcria qu6 dan vi cria c6c manh v0 ?
blTfnh ttQ lon vfln tric cria manh thrf hai Z -Ciu 6: (1,5 rli0m)
Mqt oan
Bhdng c6 th6 tich 40m3 Kh6ng phdng c6 nhigt dQ Z70C vd 6p su6t latm
a Tfnh sd ph6n ht l&i c6 ffong binh ?
b Dd ap sudt t[ng th6m l0% iryr"At U* dAu thi nhiet dO khf ti-Uao nhi6u ?
cAu z (1,5 diem) MOt binh kfn c6 th6 tich 0,4 m3 , chta & 270 Cvi 1,5 atm Khi m& n6p
binh 6p su6t cdn latm vi nhiQt dO h 00 C
a/ Tim thd tich lihi th6at kh6i binh tliau ki6n chuAn ?