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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Câu 5: !"#$!E(+2
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Câu 16: !" .N>!2-!J
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%
=& 5 'v cm s
π
= −
W>!2-!
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π
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Câu 17:  !" .$!SZP1-!JK%&(!G;πaπ'5H0)*!?62-!:01
+,2-.M8):=π0'(9)±;&π0'()±:=π0'( <);&π0'(
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'/( $!+)
Câu 20:D!]0 !"#)*!!?6@34N+,D!]0-.=&0'(NB!63!7!
+2-$/&&0'(
/
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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
HU+X!!K&-!?6@34Mb !"ZP.!"@0
HU+X!!K&-2-JK
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A

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bHU+X!!K&-2-JK
/
A
−
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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. !"#$!
O
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=
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ZP1 -.M
8)JK&N5(!GO`π'/H09) JK&N5(!GOH0 C. JK&N%O(!GOaπ'/H0<)JK&N%O(!GOH0
Câu 3. !"#$!
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=

'() +X!!K&-2-JK/
5
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6@34$!+&N/
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8)JK=(!G%&
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`π'5H
Câu 4: $!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
 
= −
 ÷
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G0H)
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J : (
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J : ( 5
5
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 
= +
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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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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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/
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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
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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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  
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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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8)JK
t%& (//
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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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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
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Dạng 3: TÍNH THỜI GIAN ĐỂ VẬT ĐI TỪ VỊ TRÍ CÓ LY ĐỘ X
1
ĐẾN X
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J /NO ( %& 
/
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= π +
 ÷
 

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Câu 21: 0 !"#2SZP1]






π
−π=
:
/%& (J
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%
G(H 9)
:
%
G(H )
5
/
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Câu 22: !"#$!>1N70 BdN!z!!]03!7.)U!"ZPue
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A. K) B. K) C. K) D. K)
Câu 23: -o-#J  $!3!78NX!!oD] -o!]u62-!J
%
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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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A. /-E B. =-E C. 5-E D. O-E
Câu 25:  !"#$!SZP1JK8 (G`H)X!!oD>]u-3oE 2!
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Câu 26M !"#u9e$!>1-.N6@34-.k)!]0,k9.kb fA-.
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Câu 27) !" .$!SZP1JK/) (G/
π
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Câu 28) -o-#J  !" .$!SZP1JK8 (/
π
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5
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k
t
π π
= +
() B.
5
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k
t
π π
= +
() C.
;& =&
k
t
π π
= − +
() D. VS(+>V)
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dao động với chu kì: A. 0,192s B. 0,56s C. 0,4s D. 0,08s
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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-.
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