, , , R Mo O, , , ..
ΣFk = 0, ΣMo(Fk) = 0 (1.3)
:
ΣFkx = 0, ΣFky = 0, ΣMo(Fk) = 0. (1.4)
(1.4) .
, , .
, , , R Mo O, , , ..
ΣFk = 0, ΣMo(Fk) = 0 (1.3)
:
ΣFkx = 0, ΣFky = 0, ΣMo(Fk) = 0. (1.4)
(1.4) .
, , .
A B Ox, , A B, , ..
ΣMA(Fk) = 0, ΣMB(Fk) = 0, ΣFkx = 0. (1.6)
, , . , .. , (1.6), .
(1.6) , . , , R*¹0 ( 2.2).
2.2
(1.6) x . x (.2) , , R*=0, .. .
, ( ), , :
ΣFkx = 0, ΣMo(Fk) = 0, (1.7)
Ox ,
ΣMA(Fk) = 0, ΣMB(Fk) = 0, (1.8)
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AB .
22
1. , .
2. .
3. .