Đề thi thử đại học môn vật lý (phần chung)

N O O’ M x l l/2   Dao động cơ ( 8 câu)  ! "#$%&'()*+,-* ).&/%!0%1).&/%!2-23/$(0* 45.678/8 "#,9%&%*+-2:*;*<%&/=<.>/?@9(A.9BC/67* "#%9,9%&2-;1,DE %F*)/*G-*H>/ "#/F*21/=8C23/.&/%F )(*%$/0%&,9%&E%F*I923/ -J  HD: 7* "#;1,DE%F*/K*+,-* I9 "# -J 7**H>/ "#/F*21/=8C23/ .&/%F /K L&,DI9 "# - L*+,-*/E*<I9 !.:*  &'I9 !.:*J M1/=8N;O.:*PQCJ R*<%&I9,9%&.:*J 2K S-T23/0I923/;OUJ  V*2 -/0%&,9%&E%F*I923/J W&/ ! "#X. "#$%&'(YZUU[.2-23/>(0* 45.Y\UU)%45/=]2-/= I9.&//9.CT67*23/%9%'T<^21/=8N;O/K/9.CT%&/&/T_%&9 ,%+%* <2:**9/09Y`.[B a 2-B9/b**9cB(_/d(*;!/%T_%&9,%+/K /9.CTT_%&/@%+6eC%1;*<%&,9%&I923/(*/9.CTT_%&/@ %+f  \ a.  g a. \. g. hJ !"#$#$  !%!&'()*'(#+#%,-!./ !)v khi thang my chuyn đng đu a=0, ngha l không khc g khi thang my đng yên. *+,4i4:#07* !%9%'T<^MR/K "#*D%F U \ mg l cm k ∆ = = R9%(j,9%& !JYU)\B67*%$/9.CT%&/&/T_%&9,%+ < /=<k9 -23/.1/C,lF* EmC/8$;*_/' 6 qt F m a= − uur r  4i/=KT_%&23/4B9J ( ) 6 nn 6 nn 6 nn U nn U nn 6 U 6B a a ) n U)\ qt dh Dat ma X x k F F m x m x kx ma kx ma m x k ma k x x X X X A t m k m A cm T s ω ϕ π ω = + + = ⇒ = − − ⇒ + + =   ⇒ + + = + = ⇒ = +  ÷   ⇒ = = = => uur uuur uur  "#*D/<.%F U n a ma l cm k ∆ = = Yo !/E*p,9%&%*+"9#m9 MRPQ/F*%$ "#*9q.)(*/YU/K a a U x cm A cm v =  ⇒ =  =  )(j,9%& !(A/9T %r*6s9/b**9/YcB !^21/=8;*<N.)#Ya.)23/0(*-T2YU<$CMRP;9 %%F\.YotQY\. W&/23/,9%&%*+"9,V/]/=lP#2:*?4i/=KJ#Y`Buπ/Laπ[vw.6D%4b23/%*%45 /d/b*%*_./ Z YauBw%G/b*%*_./ a Yax[quBw -J t6ag)v. R6v`. 6ac)`. h6\`. HD: W&/ ! "#%9,9%&%*+"92:*;*<%&t/K1/C,lI9 Ey2-,9%&/!/,6s9.&/ (K/K23/0m921/=8N;O*y.ZUzB2:*23/0E%F*(*,9%&%*+"96s9.&/(Ki {I9 !B2:*i{;9%|;OJ ZUz6 aUz6 gZz6 Zgz6 HD: i{I9 !(*,9%&%*+"9J i{I9 !B9.&/(j,9%&J ];-*=9J h%$J VN%Sf*9/0I923/,9%&%*+"9 t6 A}?92:* E(~2+6 R6;*G/*<%+/]/b**96 6 -%F* 452A4:6 h6/| p/32:*/B06 hJV%C?Ct 9*23/t)R! *+9. 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#9T*+67**+,-*I90,NT -/K%*pC?9*%&,NT p?9π[vB2:*,"%*p6 *pC?*p,la%/l;O%*pC?*p,la%&,NT2-4b%&,"%*p*p,l /=.F -67*/{*+,-*0,NT <a /K,"%*p*p,l/=.F -J a6 U)qg`66  HD: S49/{4h , Y   ⇒ ‘  Y‘ , Y aa L Zr + /9ϕ  Y r Z L Y/9 v π Y v  ⇒ ⇒ ‘  Y‘ , Ya= 7*/{*+,-* <€?a/K%&/Ey.I9&,NT*y.%*a J h%$J 7*%$J duZw2-uaw/9$J W!2-9*%%F.F0*/*G?X..&/X%*p#9T*+$/B0Š/9T%r*%4567* /B0Š Z YqU†)pB0AB€/%F/E%F*BŒ Z YZ67*/B0Š Z YZaU†)pB0AB€/3*C /=1BŒ a Y a a 67*/B0Š v YxU†/KpB0AB€/I9.F;O U)gc\6 U)\gq6 U)qa`6 U)cgZ6 HD: /5/ L7* L7*2-  L7* 9**G;-I*aaUMZZUUŽ%45.!2-9*?9I9 4:*%*p;9?9\,NT)$  YaaUM6W&/X* i.%*paaUM``UŽ%45.!2-?9/'vI9 4:*%*p-T)/Kyv,ll%+F/%&;K /4bu%S%1.'w67*%$,"%*pFT/=,NT/="9$*C/=1;O  a)`t6\)Zct6 Za)`t6 c)`t6 HD: /5/ π/3 q π A M B β α R9,"%*p;9?9 p?9969;*_,*ƒ;9,"%*p/=<*y%X2]/i4K;<6 h"%*p/=,NT/="9J  WF%*ptRX.%FtW2-%FWR6*pC?^9*%.Fr %1  6  *p C?^9*%%FtWB:.?9i4b%&,"%*p.&/$6F WR  |  $ .&//l%*p$%*p,/9T%r*%456|%_/r%*pC?*p ,l $*C /=1 :€/67*%$%*pC?*p,l^9*%/l%*p -  \\UM6 aaU v M6 aaUM6 aaU a M6 HD: /5/  CAMAB UUU  += 678 ’?,l%1 „B*/9.*CtWR/9$J M- W>/(CJ h%$J%F/*C/=1 :€/(* 7*%$/9.*CtWR%+J WR Y tR YaaUM *<C?*H9aEI9.CT?C/%*p/{ <;9*< %_AB€/9?8*y.ZUU 2:* %*+(*pAB€//=T+%G/y*/*</(A%r*6R*G/(*49/{/K%&*y.%*pC?/=<%4b ,NT;O`z%*p*H99*E.CT?C/6*4b%&,"%*p A}?92:*%*pC?6  ZU 6 x)`U` 6 ZU)`Z` 6x)c 6 HD: Chọn B V* -AB€/i*/*</)%*p/=^%4b,NT6 AB€/9?8(*49/{%*pC?J∆ Z Y a Z a Z R P U M:* Z YL∆ Z “ Z Y Z 6 Z AB€/9?8(*/{%*pC?J∆ a Y a a a a R P U M:* a YL∆ a 6 &*y.%*pC?/=<%4b,NT(*49/{%*pC?J∆Y Z YU)U` Z  a Z Z U)U`U R P ⇒ =  a a Z Z a a a a a a a Z Z Z ZUU ZU P P U U P P P U U P ∆ = = → = ∆  Z YL∆ Z  a YL∆ a YLU)UZ∆ Z YL∆ Z U)xx∆ Z Y Z ”U)xx∆ Z W>/(C a Z a a Z Z Z Z Z a a Z Z U)U` U)U` U P R P P P P U U ∆ = = =  h%$J a a Z Z Z Z Z Z Z Z U)xx U)xx6U)U` ZU ZU ZU x)`U` U P P P P P U P P P − ∆ − = = = = M3T a Yx)`U` Z rmC/J AB€/9?8*y. )%&*y.%*pC?;O9z %*pC?9*%X>;O;z%*pC? 9*%i*/*</l n a n Z  9 uZ 9w     + − =  ( ) a Z Q  ;   Q   Z ; + = + >/%*pC? U Bu U t ω = 2-a%&y./$ HL π v Z = 6•/b*%*_./ Z C*C/=1/'/b*I9 2-*  45/ -ZUUM2- a)` v− t6•/b*%*_./ a $*C/=1 - ZUU v M2-a)`t6K.‡ ZaUˆu=9,[Bw6 ZUUˆu=9,[Bw6 `Uˆu=9,[Bw6 Z`Uˆu=9,[Bw6 HD: /5/ h.F|$<2- A2A?9964i/=8I9*$,FJ tItIi ω π ω B*w a Bu UU =−= u–w U Bu U t ω = u––w A B M α β UR UL UC du–w2-u––wBT=9 Z a U a U =         +         U u I i 9$p          =         +         =         +         Z vZUU`)a Z ZUUv`)a a U a U a U a U UI UI sT=9    = = VU I aUU ` U U Mà w[uZaU aUU ` U U srad LZ U I L πω ω =↔=↔= >/  %*p  C?  #9T *+$*C/=1*p ,l tR  YvU a M2-9*%%F .F tWR6  R*G/ %F  .F  tW X.%*p/=^/ 0*/*G?2:*/l%*p) %F.FWR| '9  &  ,NT /  y.6  R*G/ &,NT$%&y.   /9T  %r*  %456 7*  %*p  C? 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