, , . μ. , .
, , , . , , , .
, . , , , (. (1.2)) m= IS n,
m = IS = enS, (21.1)
I = e n , n , S . (.21), m, .
.21 , v r m
L e,
L e= mvr = 2 mnS, (21.2)
v = 2πn r, πr 2= S. L e, , . . 21 , m L e, , , (21.1) (22.2),
m= e L e/2 m = g L e, (21.3)
g = /(2 m) . , , ( ), v r .
g s= / m, , g. , , , , m L e L es, . , , . , , . L es ()
ms= g s L es. (21.4)
g s .
. , , ( ). , . , () , ( ) () :
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a = S m + S ms. (21.5)