: " m " .
F1 mg. " ", (F1 + F). " ": F = - kx (1), k - . "-" , . F :
1) ;
2) .
. , , - kx. , , , , .
:
,
" k " " m " - , " w0 ", ..
. . , (1)
.
, : x = Acos(w0 t + a0), (2)
(w0 t + a0) = a - ;
a0 - t = 0;
w0 - ;
A - .
, x .
, , f = - kx, .
.
: . : . n : .