Tải bản đầy đủ

Phân loại Chuyên Đề Dao Động Cơ Học

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PHÂN LOẠI BÀI TẬP CHƯƠNG DAO ĐỘNG CƠ
Dạng 1: Vận dụng các đặc điểm của dao động điều hòa, so sánh pha của dao động.
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5
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Câu 2: !"#)+,>!?6@34-.5%)=0'(.!+AB!,-.=0'(
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Câu 3: Một  !" .7?FB 2!".!=&G0H)*!I6JK%&G0H2+
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Câu 4: !,0P+  !" . J!-7 B89K%:G0H.-.0 Q>R,
P?$!+%/&&G#'SH)9T?0U!0(V)>L .+AB!,S!-.M
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Câu 5: !"#$!E(+2
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Câu 7: D!]0 !"#7?FB 2!".!/&0. > X!!5S2A!^O=&
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Câu 8M !"#$!SZP1MJK:(!Gπ`HG0H)C!.+,IX!!]0K(-.M8)JK
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Câu 8M !"#$!3!7O0N>!2-!JKa5012+=π0'()E(+ -.M
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Câu 9:  !"#2SZP1
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Câu 11Mg,0 !" .2BZ1hM
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Câu 12Mg3!]!(A3!e!7,+b -!  !" .21B. (@M
A. ZXS3 -WB. ZX#WC. ZXb-!SWD. ZXSb3 -
Câu 13. !" .>!2-!
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Câu 16: !" .N>!2-!J
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%
=& 5 'v cm s
π
= −
W>!2-!
/
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π
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Câu 17:  !" .$!SZP1-!JK%&(!G;πaπ'5H0)*!?62-!:01
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Câu 18:  !" .
8)+3!el!!" .mS( $!-!) 9)+3!el!!" .Z[S( $!-!)
%
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)+3!el!!" .($0Sπ'/( $!-!)<)+3!el!!" .0Sπ'/( $!-!)
Câu 19:   !" .
8)!+3!el!!" .mS( $!-!) 9)!+3!el!!" .Z[S( $!-!)
)!+3!el!!" .($0Sπ'/( $!-!)<)!+3!el!!" .0Sπ'/( $!-!)
Câu 20:   !" .
8)!+3!el!!" .mS( $!+)9)!+3!el!!" .Z[S( $!+)
)!+3!el!!" .($0Sπ'/( $!+)<)!+3!el!!" .0Sπ'/( $!+)
Câu 20:D!]0 !"#)*!!?6@34N+,D!]0-.=&0'(NB!63!7!
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/
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Dạng 2: Viết phương trình của dao động điều hòa
Bài 1M !"#$!>LK%(.3!78K%&0)!eSZP1 , VZX
[S(M
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3HU+X!!K&-2-JKa8G63!7@0H
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HU+X!!K&-2-JK
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A
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bHU+X!!K&-2-JK
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A

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±
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±
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)b !"ZP.!"@0
HY10?-,!^!eSZP1 .3!]!27QU)
Câu 2. !"#$!
O
ω
=
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ZP1 -.M
8)JK&N5(!GO`π'/H09) JK&N5(!GOH0 C. JK&N%O(!GOaπ'/H0<)JK&N%O(!GOH0
Câu 3. !"#$!
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=
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5
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6@34$!+&N/
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8)JK=(!G%&
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/
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Câu 4: $!3!7:G0H)CK&N -o?62-!JK5
/
G0Hb !"ZP$!!+2
-$
5
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8)JK: (\G0H9p)

J : (
5 =
π
 
= −
 ÷
 
G0H)

J : (
5 =
π
 
= +
 ÷
 
G0H<)
J : ( 5
5
π
 
= +
 ÷
 
G0H
Câu 5: D!]02>+!-Z[0K%& !"#7 Bd.!=0NE(+O_)CK&ND!]0I
6  @  34  .  3o  E  !  b  Z$  ZP  ,  ?F  B )  9!]  f  U    ,    b  X!  !M
8)JK/ (G%&iai'/H0 9)JK/ (%&i0 )JK= (G%&i`i'/H0 <)JK= (Oi0
Câu 6: 2>+!-Z[0K%> !" .$!>1K/()?6@34$!+
&
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/
K%&)ZP1 ,-.M
Câu 7M ! !" .mSZPNm>1K/()< fD2-!IX!!]03EGK&H34
3!7 .34%0)< f!23!734
5
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8HJ
%
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/
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5
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%
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HJ
%
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%
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/
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Câu 8: -o-#J g0?ET.2f>K;&'0) -oA!^%&& e5%N=()U+X!
!-.-?E2-!/0.]b !"ZP,QU$!+2-$
=& 50 ' (
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SZP1 ,?E-.M
/

A.
J = (G/&a '5H0
= π
B.
J : (G/&` ':H0
= π
C.
J = (G/&` ':H0
= π
D.
J : (G/&a '5H0
= π
Câu 9: 2>+!-Z[0K%> !" .$!>1K/()?6@34$!+
&
K
5%N=0'()*!K&N?62-!JKO0Z[!"ZP?B )CDπ
/
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!" .,-.M
  
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U+X!!-?6@34b !"@0)ZP1 ,-.M
A.
; (G/ H
/
x c cm
π
π
= +
B.
; (G/ H
/
x c cm
π
π
= −
C.
= (G= H
/
x c cm
π
π
= −
D.
= (G= H
/
x c cm
π
π
= +
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>!-#J !Y%&0)*s b SZPdf $!>!-#J 2!".!=/0Ng!" +/&0'(
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8)JK
t%& (//
G0H9)JK
t%& (/
G0H)JK
H
=
5
%& (G//
π
−t
G0H<)JK
H
=
%& (G/
π
+t
G0H
Câu 46: !" .>!?6@342+K/&0'(.!+AB!,-.K/0'(
/
)
UK&-.-?6@34b !"@0,Q BNSZP1 ,-.M
A. JK/ (G%&H0)B. JK/ (G%&`πH0)C. JK/ (G%&aπ'/H0)D. JK/ (G%&`π'/H0)
Câu 37: !" .>!?6@342+K/&0'()t!+AB!,-.
0J
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/
)
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A. JK/ (G%&`iH0)B. JK/ (G%&`i'/H0)C. JK/ (G%&i'/H0)D. JK/ (G%&H0)
/)ZP1 .  3!ef$!X!!]0K%NO(2-!JKaOG0Hc
8)JKO(!G5π`πHG0HW9)JKO(!/πG0HW)JKO(!G5π`π'/HG0HW<)JKO(!5πG0H
6.D!]0A!^ !" .b SZP407 Bd89K/$!>1K/()U+
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Dạng 3: TÍNH THỜI GIAN ĐỂ VẬT ĐI TỪ VỊ TRÍ CÓ LY ĐỘ X
1
ĐẾN X
2
Câu 1:  !"#$!>L.3!78)Y6> X!!oD]!u62-
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/
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%
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/
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%
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%
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%
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%
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8)6> X!!oD]!u62-J
%
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%
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Câu 3MMU!%-.X!!oD!u9e-!JK8'/./-.X!!!u6-!JK8'/
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%
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/
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%
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/
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%
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%
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/
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Câu 4M !"#2SZP1JK; (%&i)vVX!!]0!?6JK=-Ef/b !"
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Câu 5: 0 !"#2SZP1]






π
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:
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5
%
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%
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%/
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Câu 6: -o-#J  $!3!78)X!!oD]!u6@34e!]02-!
/
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Câu 7M !"#$!SZP1
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= +
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Câu 24: b SZP1JK/ (GOπ`π':H`%G0H) !@E!7>]u-3oE 
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Câu 26M !"#u9e$!>1-.N6@34-.k)!]0,k9.kb fA-.
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Dạng 5 : Tốc độ trung bình, tốc độ trung bình lớn nhất
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thứ 2 thì con lắc tương ứng dao động với chu kì 0,32s. Nếu mắc song song 2 lò xo rồi gắn quả nặng m thì con lắc tương ứng
dao động với chu kì: A. 0,192s B. 0,56s C. 0,4s D. 0,08s
Câu 9:90
%
K=&&N0
/
KO&&.0
5
Kw&&Z[02+!!eS. 0-#J G0
%
+!$!-#J N0
/
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5
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H)*!3T0
5
!N1^ $!>L
%
K5G(H)T!>L ,^>!Z3T0
5
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H-E-Z[-.3 !7M
A. K/G(HN
/
K:G(H B. K=G(HN
/
K/G(H C. K/G(HN
/
K=G(H D. K:G(HN
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K%G(H
Câu 10Mb 0x. 0-#J N-#J Y%&0N-DK%&0'(
/
)*66  $!3!7T1
>L ,-.MA)&N:5( B)&N;w(C)%N/;(D)/N%/(
Câu 11: -o-#J df !" .$!3!7%&0) ?V1 „(+-A.g!AB!
.A!],-#J -.
%5
5
N-DKπ
/
0'()>1 ,-.MA.%(B.&N;(C.&NO(D.VSV>V)
Câu 12:*!o0?Ex0
%
. 0-#J N2 $!0>L
%
K%N/G(HW>!o?x0
/
. …-#
J 22 $!>L
/
K%N:G(H)*!ogX!/?xG0
%
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8)K
%
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K/N;G(H9)K
/
/
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%
TT +
K/G(H)K
/
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%
TT +
K=G(H <)K
/%
%%
TT
+
K%N=OG(H
Dạng 8: Lực đàn hồi cực đại và cực tiểu, chiều dài cực đại cực tiểu
Câu 1: -o-#J f*b dfNE7+NEZ$!o)!Y,-#J B!6@34-.
∆-)  -o !"#b SZPdf$!3!78G8†∆-H) ?V1 
HCAAB!VQ. !]0b 2-$-.M
A. ‡K*G8∆-H B. ‡K*)∆-`8 C. ‡K*G∆-`8H D. ‡K*)8`∆-
3HCA.g!A!]VQ. !]0b -.M
A. ‡K*G∆-a8H B. ‡K*)∆-`8 C. ‡K*G∆-`8H D. ‡K*)8`∆-
w

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