. , . , , .
- i, e r , Y
. |
(1) |
, dt
. |
(2) |
, dA,
. |
(3) |
l, i (.1 )). f, , dx. (3)
. |
(4) |
(5) |
, (5) . dl dx (. 1 ))
d=Bcosb ds=Bcosb dldx,
b - B ds=dl dx, dl . (5)
|
(6) |
. |
(7) |
, , (. 2).
ab ad (6) df1=iBcosb 1dl1 df2=iBcosb 2dl2, b 2 = 90 , bc ad .
b 1 b 1= w t . , ab
, |
(8) |
ab - ab. , ,
, |
(9) |
s - .
(3), da
dA = Mda = idY , |
(10) |
a = w t, da = d(w t) = w dt.
. |
(11) |
- b , , .. Y = Y m sin b . Y (11) , Y m=Bs ,
. |
(12) |
, (9) (12) . , w Y ,
. |
(13) |
, , , (9) (12) b b = w t. ,
. |
(14) |
, , , , , , .
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