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1. , l = l/12, t = T /6. = 0,050 .
(0,043 )
2. 5,0 , 4,0 . .
( = 7,810-2 /; am = 0,12 /2)
4. , =A1sinw1 t y = A2cosw2 t, A1 = 8 cm, A2 = 4 , w1 = w2 = 2 --1. .
5. , x = Asinw t, A=5 , w= 2 --1. , = 0,1 , F=5 . t.
6. n R = 20 , .
7. R == 40 , .
8. , D r =18 v max=16 /.
9. , x = 4 , v =10 /. j , T=2 .
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10. : 1 = 1sinw1 t x 2= = A 2sinw2(t + t), 1 = 2 = 3 , w1 = w2 = p--1, t = 0,5 . j . . t = 0.
11. = 200 , k = 500 /. m = 10 , v = 300 /, . , T .
12. m = 60 T=2 . x = 4,0 E = 0,02 . .
13. y = 0,34×cos(0,20 t 0,40 x), y , . , , , .
( = 0,50 /; l = 16 )
14. = 15 /. = 1,2 . Dj , x 1 = 20 , x 2 = 30 . (200)
15. . : 1) ; 2) ; 3) ; 4) ; 5) ; 6) .
( = 2 ; /c; )
16. = 4,0 ; t = T /8 = 4,5 . . .
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17. , , . : , , , , = 9 ( )