, .
= mu2/2 -
= kX2//2 -
, :
+ =
u = dX/dt = (A sin wt)\ = A cos wt u = Aw
a = d2X/dt2 = du/dt (Acos wt)\ = -Aw2sin wt a = Aw2
:
Ek = mA2 cos2w t
:
= kA2/2 : k = m w2 k = ma /X = mA2w 2/X
:
= mA2 w 2 sin2 w t
= mA2 w2 sin2 w t
2
+ = mA2 w2 (sin2 wt + cos2wt)
, ,
= mA2 w2
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= Aoe-bt sinwt e b -
: