4
. () , n :
. r , , z.
R (.23).
dr r r+dr. dJ = r2dm ( dr<<r, , r), dm ; 2prhdr. r , dm= r 2prhdr dJ = 2prr3dr.
p R'2h , m = pR2hr,
J = 1/2R2.
, , : J Jc , , m : J = Jc + ma2. (16.1)
1
(. 1) ( , ).
(. 1), z, (. 24). m 1, m 2 ,..., mn, r 1, r 2,..., rn . mi, ri vi. , :
w = v 1 /r 1 = v 2 /r 2 =... = vn/rn. (17.1)
:
(17.1),
Jz 2. ,
T = Jzw2/2. (17.2)
(17.2) (12.1) , (T= mv2/2), , . (17.2) , .
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, , , :
m ; vc ; J , ; w .