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m J
Mz
dA = Fsds dA = Mzdφ
- l = 1 m = 100 , , 1/3 . (: J = 10-3 2.)
- R = 40 m = 1 , . (: J = 0,12 2.)
- l = 1 m1 = 1 m2 = 0,5 . , , l/3 . ( I = 0,09 2)
- R = 10 m = 5 φ = A + Bt2 + Ct3 ( = 1, B = 2 /2; = -0,5 /3). t = 3c. (: = - 0,1 ͷ.)
- n = 600 /. , N = 50 , . 31,4 . . (: 1) = 0,1 ͷ; 2) I = 1, 5910-2 2)
- , 120 2, n = 240 /. t = 3,14 . , . (: = 16 ͷ.)
- , , F = 40 , t = 5c 2,5 . (: m = 16 )
- R = 1,5 m1 = 180 n = 10 -1. m2 = 60 . , ? (: v = 0,942 /)
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- , , l = 2,5 m = 8 , . ( ) J = 10 2 v1 =12 -1. v2 , . ( v2 =8,5 -1)
- m1 = 10 . , m2 = 2 . , . (: = 2,8 /2)
- R = 50 , m = 6,4 . , , = 2 /2. , . (: J = 6,25,12 2; 2) = 50 )
- m1 = 0,25 , ( ) m2 =0,2, . m =0,15 . μ=0,2. , : 1) , ; 2) 1 2 . (: =2.45 /2; 2) 1 = 1,1 ; 2 = 1,47 ).
- R = 30 m = 3 l = 5 α = 25. , 4,6 /.(: J = 0,259 2)
- , α = 30 , . , , , 30 . (: t = 0,585 )
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