Review - 69 1 m 1 m 2 T 1 T 2 2 1 m 1 m 2 A.2 1 B.4 1 C.1 4...

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Unformatted text preview: __________ _________ _________ ___________ 69 1. m 1 m 2 T 1 T 2 2 1 m 1 m 2 A.2 1 B.4 1 C.1 4 D.1 2 2. 1 cos( ) x A t ϖ α = + A. 2 cos( ) 2 x A t π ϖ α = + + B. 2 cos( / 2) x A t ϖ α π = +- C. 2 3 cos( ) 2 x A t ϖ α π = +- D. 2 cos( ) x A t ϖ α π = + + 3. T A A/2 A. 4 T B. 6 T C. 8 T D. 12 T 4. x A 4cm T 2s t=0 x= 2cm x x= 2cm A.1s B. 2 3 s C. 4 3 s D. 2 s 5. 1 4cos(2 / 6)cm x t π = + 2 7 3cos(2 )cm 6 x t π = + A. 1cm π B. 7cm 4 3 π __________ _________ _________ ___________ 70 C. 1cm 7 6 π D. 1cm / 6 π 6. cos( ) x A t ϖ ϕ = + 2 T t = T A. sin A ϖ ϕ- B. sin A ϖ ϕ C. cos A ϖ ϕ- D. cos A ϖ ϕ 7. A. B. C. D. 1. cos( ) x A t ϖ ϕ = + m A 2. cos(3 ) x A t ϕ = + t=0 0.04m 0.09m/s A ϕ 3. 4. 5. A T t=0 1 2 3 A/2 6. 7. 5 g=9.8m/s 2 __________ _________ _________ ___________ 71 8. 20cm 1 6 π φ φ- = 10 3cm 17.3cm = cm 1 2 φ φ- 1. X X A 30mm v=6Hz 1 X 2 x= 30mm 3 t 1s 2. 2kg T 1/2(s) A 4cm 1 2 __________ _________ _________ ___________ 72 3. 0.25kg k 25Nm-1 0.06J 0.02J 1 2 3 4. __________ _________ _________ ___________ 73 5. 2kg 2 0.2sin(5 ) 6 x t =- SI x 1 t 0 2 6. 1 1 0.24cos( ) 2 3 x t π π = + SI t 0 x 0.12m v<0 t ∆ __________ _________ _________ ___________ 74 1. X x A.0 B. π C. 2 π D. 2 π- 1 2. λ P S 1 1 ϕ S 1 P r 1 S 2 2 ϕ S 2 P r 2 k P A. 2 1 r r k λ- = B. 2 1 2 1 2 ( ) 2 r r k π ϕ ϕ π λ- +- = C. 2 1 2 k ϕ ϕ π- = D. 2 1 2 1 2 ( ) 2 r r k π ϕ ϕ π λ--- = 2 3. cos ( ) x y A t u ϖ ϕ   =- +     A. x B. x C. x D. ϕ 4. __________ ____________ _________ ___________ 75 A. B. C. D. 5. P P A. P B. P C. P D. P 6. A. B. C. D. 4 λ 7. A. B. C. D. 8. 0.05sin ( 2 ) y t x π =-- SI v Hz u m/s A m A. 1 2 1 2 0.05 B. 1 2 1 0.05 C. 1 2 1 2 0.05 D.2 2 0.05 9. t A.o b d f B.a c e g C. o d D.b f 9 __________ ____________ _________ ___________ 76 1. 0.01cos(250 10 )m y t x π π =- t 0.1s x 2m m m キ s-1 m キ s-2 2. Ox λ P 1 cos(2 ) 2 p y A vt π π = + P O t 1 2 3. 4. S 1 S 2 20m 0.2s 40m/s S 1 1 cos(10 ) 2 y A t π π = + S 2 2 cos(10 ) 2 y A t π π =- S 1 S 2 X S 1 S 2 S 1 S 2 x 5. 1 5cos(20 )( ) 10 2 y t x SI π π π =- + 2 5cos(20 )( ) 10 2 y t x SI π π π = +- 6. 7. S cos( 2 / ) y A t x ϖ π λ =- ϖ S __________ ____________ _________ ___________ 77 8. 500Hz 350m/s 2 3 π m 9. 2 4 00 10 s- ⋅ × 300 m キ s-1 x x 1 10.0m x 2 16.0m 10. 90 ー 1 0.3cos(3 ) y t π = SI 2 0.4cos(3 ) y t π = SI t 1. 1 6.0 10 cos( )m 5 y t π- = × 2.0m キ s-1 1 6.0m 2 2. u 20m キ s-1 A 3cos4 y t π = 1 A 2 B 2 __________ ____________ _________ ___________ 78 3. u X λ 4 x λ = cos x y A t ϖ = 4. A B 100Hz B A ϕ ϕ π- = A B 30m 400m キ s-1 AB 5. x 2 cos2 ( / ) y A vt x π λ =- 1 2 __________ ____________ _________ ___________ 79 6. x A 10cm 1 7 rad s ϖ π- = g t 1.0s x 10cm...
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This note was uploaded on 11/06/2011 for the course ENG 124004 taught by Professor Jianinghe during the Fall '09 term at Tongji.

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Review - 69 1 m 1 m 2 T 1 T 2 2 1 m 1 m 2 A.2 1 B.4 1 C.1 4...

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