   ( Đề thi gồm có 02 trang)   !"#"$!"##  %&$ #'"()*+(không kể thời gian giao đề) #',!,!"##  #/(3,0 điểm)   !"#$%&' ( v uur )*&+, - /0 12314 56)*78!9:;<%;=:>; ?@AB!BC'D>;<4 EF0)-GHD !"#$% &'H !IG&4&B'JKGC'@ L55#)  !/(2,5 điểm) <A5#>?@>&B!H 5%A3M F  N HD!3M5  E N0)* 5O>K>*H@P5%A3M5#&4 'LQ5#A#3,)R8'L 8ANS ( *E @B 5O>K>*H D#31@ATA#>UA#FA#)V'HW8 L8 !IE HI!#X&4)6" HY Z K [NY Z * )-\< I8D#Y Z O @ 8)  0/(3,0 điểm) *:83EU) !H'88!,!L']^ F [^ N [_Y>! F [F`>! N [N`a:Hb F [T`>b N [S` 8!,ba5+Ycd>TY)efg8C':H h'3Eia5+H8!,!A)# Fj-8'8+k OK  !I8!,b) Nj*'8''Ll'])  1/(2,5 điểm) -'5#G; F >; N !55#>H 9AA3Mm F >m N  '5lQ!9#) $?GOK!3'5#; F  ES0> 3M%H:'%QC'8A5 F )eP$% I>nn'5#E%H:C'8A5 N ) FjE8@AB8Pm F >m N >5 F >5 N l)  NjK+5 F  [F>5 N [S>l [NT'5#!BA &4QH+'a3M:&, ?o'A]& 5#'L; N A F>NTA& 5#'L; F )# 9m F m N ) !FjN  -EF -EN -EU -ES  2/(3,5 điểm) *:83ET ( ) OK ' [k Np Y > p n3M> N 6 b [ * ) Fj*@!48 ' 5+' ') NjY8%'L:>% p H !I A F p  N p  0E8@AB8P F p  N p ) &0E8%'L:&+%cL 5+ F Y > N Y AA3MA F k  N k ) qg9 F>_ 6[ - r a sU F( *[ t ur a F k [FT(Y a N k [N((Y) KGC'8!,gX%>8!, 5+!A)   3/(3,5 điểm) *A<6Hh'gvB ( STl cm= $GH5% A3M  F((g= >5#3$5 5D) Fj!2A<231?@>'!B%I>'g3!2$>5 X&4>A<Hh'g T(l cm = )E@LA<) Nj*=A< F 6 > N 6 Hh'gAA3MA F FTl cm= > N U(l cm= !]="231?@!2$3E_)OKA D%I):D&'>P$A<5&+g:> 'Hw$g) 0*@$gh') &0Y+31!Eg.7%AA" A<5&I &+g:>%7,I!#X&4>h'g313<'%0) 0#AvAG g9ABDK) 6 N F( jg m s= &GC'7 )   4/(2 điểm). ef2Ag'x!9 '<'%A:QHLE+ 8< I$$!'&E!BH)-G 2+3+>+' 3!HMgXHh'g\&+>C'g7]]&XJ* 2x \&+!3h'g3<#:LH!35: <'%) $$$$$$$$5$$$$$$ -7B7)))))))))))))))))))))))))))))V%& g))))))))))))))))) e IF)))))))))))))))))))))))))))))))))))RyB))))))))))))))))))))) e IN)))))))))))))))))))))))))))))))))))RyB))))))))))))))))))))) -ET -E_  z-{*N(F(sN(FF 678 %&s-| F}j(NjN(FN 9 6:;$678 <=>  # ?0@"AB s*78!9:;<%;=:>;?@AB!B C'D>;<43Ei) se7 α AHM&, ( v 31) s|31!E'DL  ( ) ( N ( .F0  .N0 N x v co s t g t y h v t α α =    = + −   s|31!EC'~:L  [•< α s N N N ( N x scov g α .U0 sR!"#    = = Hy Lx .U0 3M6 N  N α sN ( N 6 α •6 N •N ( N o0[(.S0 €D31!E.S0A'H8 α E • ∆ ≥ () - ( S oN o0 ( N o N 6 N  ≥ ( V'! ( N  ≥ ‚ o0• NN 0. LhH +− ƒ Y$ ( ) ( ) { } N N (  g H h H h L= − + − +  (>T (>T (>T (>T (>T (>T  ! ?!@2AB „8&' ( H  F [. K o O 0V.0  N [. * o K 0V.&0  O Y O [ K Y K [ * Y * [b ( .0 (>T !Fj_ 6.0.&05+M.03M F N  F  T =  .F0 „8A"'H  F [.Z K oZ O 0V.g0  N [.Z * oZ K 0V.20 Z O YZ O [Z K YZ K [Z * YZ * [b.…0 6.g0.205+M.…03M • F K • N O  Y F  Y = − .N0 .F0.N0 • K • O Y S Y T = K+YZ O •YZ K •YZ * [uA# #3M • • O K ST U_ Y † Y FF FF l l= = qg931!E!: 5#A#3,5O,!: ' ' • • O O O O (  Y  Y   = Y. K o O 0V[.Z K oZ O 0VV'! • O O  }  U = R+C'[_S}R (>NT (>T (>NT (>NT (>NT (>NT (>NT  0 ?0@"AB FjH‡[‡ F •‡ N .F0 qg9IA'$; ::@'] k OK [^ F o‡ F .! F •b F 0.N0 k OK [^ N o‡ N .! N •b N 0.U0 k OK [‡b.S0 V'!‡ F [‡ N [ ‡ N 2h%c5+Ad>T.Y0)H k  [k K •k K !Hk K [^ N o‡ N ! N [^ N o ‡ N ! N k K [‡ F b F [ ‡ N b F ) V'!k  [^ N o ‡ N ! N • ‡ N b F [_•F>T)‡[d>T Y$‡[FOa‡ F [‡ N [(>TO R+C'k OK [^ F o‡ F .! F •b F 0[U.Y0 2.S0#3Mb[U`) Nj*'Ll']8 | F [^ F ‡ F [Uˆa| N [^ N ‡ N [Uˆ -8'' ']8 - F [ F F F F F F k ^ ! ‡ uF>d‰ ^ ^ − = = ) - N [ N N N N N N k ^ ! ‡ }U>U‰ ^ ^ − = = ) (>NT (>NT (>NT (>NT (>NT (>NT (>NT (>NT (>T (>NT (>NT !Nj_  1 ?!@2AB Fj!3M; F !3; N g F [<H • F F F <… g <s… =  • F F F N F F F <… < … <… g g <s… <s… l l l l − − = − = − = V%Hg:L8 F N F N F F N N F N F F N … … … … 5 ) <s… g s… <. … … 0 … … …l l     = − − =  ÷  ÷ − − − +     V'!5 F <.lo… F o… N 0[5 F l… F o5 F … F … N •… F … N .F0 31v!3M; N ,!3; F H 5 N <.lo… F o… N 0[5 N l… N o5 N … F … N •… F … N .N0 *.F0.N0'D5f<&+n3M 5 F 5 N A.… N o… F 0[… F … N .5 N o5 F 0 R+C'm F om N [ N F F N 5 5 F ) 5 5 l   −  ÷   Nje7bA& 5#'L; F) Y& 5#L'L; N A F>NTA& 5#'L; F H m F [.oF0 F b m N [.oF0 F F>NT)b c% F N m F>NT m = .U0  %A8'hm F om N [U.S0 e8.U0.S03Mm F [FTgm N [FNg (>NT (>NT (>NT (>NT (>T (>T (>T  2 ?0@2AB Fje7HA8P8 L:O*>*Kg8AA3MA F ϕ > N ϕ F  C Z R ϕ − = > N  L Z R ϕ = ⇒ F N N N   F C L L Z Z C R R ϕ ϕ − − = = = − ⇒ N8 '5+'') Nj 0H ( ) ( ) N N N N F N F N N N  F F N N R R R L R L C C ϕ ω ω ω ω = =     + − + −  ÷  ÷     N N F N F N F F L L C C ω ω ω ω     − = −  ÷  ÷     ( ) ( ) F N F N F N F N F F F ( F F F ( L C L C ω ω ω ω ω ω ω ω    − − − =   ÷    ⇒     + − + =  ÷     (>dT (>NT (>NT (>NT .A:0 Trang 4/6 !Uj_ F N F N F N F ( F F L C LC LC ω ω ω ω ω ω  + =   ⇒  = → =   &0sH N N N FR C U U U+ = > N N N NR L U U U+ = > N L R C = N L C R U U U→ = S N N F N N N R R R U U U U U → + = − ( ) N N N N N N F N F ) R R U U U U U U→ = − → F N N N F N R U U U U U = + s5  N N F NAB U U U= + F N N N F N N N  (>u_ R AB U U U U U U ϕ → = = = + (>T (>T (>T (>T  3 ?0@2AB Fj •:Y*K ( dh P F+ = ur uuur r ⇒ mg k l= ∆ N( jk N m ⇒ = Nj •e7 F k > N k A @L A< F L , N L - Tại Y*K; dh P F= ( ) F N mg k k l⇒ = + ∆ ( ) F l CO AC l∆ = = A.\0L N L ( F L ) sY$,YHAx . 0x OM=  d P F ma− =  F N P F F ma− − = ( ) F N ••k k x mx⇒ − + = *@G$gh'%H F N k k m ω + = .0 N&j •|31!EgHg: ( ) x A t ω ϕ = + •+' g9 A< F L , N L QAvtE F F N N F k l k l k l= ∆ = ∆ = ∆ > F N l l x l x l x∆ = ∆ = ∆ = ∆ . x ∆ A&+g:@ 1Ih'gLA<0 (>T (>NT (>NT (>NT (>NT (>NT O  C ; K F F uur N F uur Trang 5/6 !Sj_ F F N N kl k l k l⇒ = = F _( jk N m⇒ = > N U( jk N m= mH F N U( j k k rad s m ω + = = sEO ϕ   ( ) F N mg k k l= + ∆ .F0 F N (>(FFF mg l m k k ∆ = = + :[(6<5&+g:>@,*H7 ( x  ( F>FFx OC l cm= − = −∆ = −  (v = V'! F>FFA cm=  ϕ π = Y$ ( ) F>FF U(x t π = +  Nj •6vG g9ABK5$,*  (F = •6vA g9KA5 N L &I: < N )N (>__dF k A N= = (>NT (>NT (>NT (>T (>T  4 ?!@"AB s6A= 7&4MgXC'!7)mQ]]& X< I'5ELA=)V'H>gQ@A=>HD<  I3M Š g s%!7!3LA: N Š N S l g T π = ,Xh'gALA=\3M!3 s2IA'$g‹x!9 Š Š N P M g G m R = = M A5%A3ML>R A& 5#LHGA4%g‹ x!9) s*+L31!E!B&4'3M N N N S R l M GT π = sK 5#L&D'gŒC'h'g<#:CL N C R π = (>dT (>NT (>NT (>NT !Tj_ sb"!5%A3M!B!'&ED L N N _M l D V GT C π = = H#m) (>T C)*D/  ! "#$%& '( )* !"+,(- )*',(. /012$3456  7 )892$! "346 & :'( "2" ;<' => '',(.(!?1 @ '(!>,(63A! B"C( &   !NjN !_j_ .    ( Đề thi gồm có 02 trang)   !"#"$!"##  %&$ #'"()*+(không kể thời gian giao đề) #',!,!"## 