. . . .
. =0-1
:1) - .
2) -.
.
-.
P(x, y, z) = P(x1, y1, z1, x2, y2, z2, , xn, yn, zn) , .
F(x, y, z) , :
F(x, y, z) = grad P = [(dP/dx)i + [(dP/dy)j + [(dP/dz)k], P(x, y, z) .
. .
. +=const. . : T2 T1 = A12
: T2 T1 = P1 P2, T1 + P1 = T2 + P2
. (, , .).
, .
. , , . =(v2c)/2+(Jc ω2)/2
.
, .
Mxc=∑Fkxe
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Myc=∑Fkye
Mzc=∑Fkze