1
1. . ... F = - Dx. : 1. . 2. . F = 0 . 3. x . x. 4. . ( ) . 5.
F. F = - Dx D ( x). ( ) .
.
1
...
2
..
m Bx F
B Bx
By F
x
xo
: .. : F = 0 x - F = 0 x : x Kxo (1) F = x xo x
F = x F F = x (xo + x) (1) F = x ... D = K
. :
.
2
3
yy ... : = x = A x = At =t . : ... q , . : x = At . . x1 x2 : 1.
x1. x1. +
+
x t
-
x
t
-
.
3
4
2. 3.
4. 5.
: ( ) ( ) x2 . . x1 x2 . : . 2 t = ; t = T t
: x1=2 cm U>0 x2 = - 2 3 cm . ... = 4 cm =2 sec. x1 + x2 x2 .
: x 1= 1 1=/6 A x 1= 2 1=/3 A = /3 + /2 + /3 = 7/6 2 t = ; 7/6
.+
x1 2 x2 1
-
t =2 .
7 6 t = 7/6 sec 24
5
. - : x=A t = u = Umaxtu U max x A
t =
2t + 2t = 1
u2 x2 x2 + 2 =1 + U max A2 A2 u2 = 1 u2 = 2A2 2x2 u = A2 x2 2 2
H : 1 1 1 +U= Dx2 + mu2 = DA2 x2 + mu2 = m2A2 2 2 2
. : =-max t = max
2t + 2t = 1
u = umaxt t = u umax2 u2 + =1 2 ax u2ax m m
2 + 4 2
u2 = 1 2 = 4A2 2u2 = 2 2 u2 2 2 2 = umax u2
u = A 2 x2 = - 2x
.
5
6
. : +U= . . : +U=E( + U ) E = t t U U + =0 =t t t t t
, . . . Hooke: F = - x : = x = (...) : ... : () x ... U=1 x2
2
() x1 () x2 : W = -U W = - (U-U) W = U,-U, W =1 1 2 x1 x2 2 2
2
: x1 x2 . . . 6
7
x1 . :1 (xo + x1 )2 2 1 2 : UT = x1 2
: U =
... ..
xo x1
U UT : () F = (xo+x1) () FT = Dx1 = Kx1
: .. ... . : UE+UB=E 1 q2 1 2 1 Q2 + Li = 2q2 + i2 = 2Q2 i = Q2
q2 2 C 2 2 C
i. . VC VL V . : =Vc=VL=q C
q . . i t
: =Vc=VL=q i -L = C t q 1 q = C L C i = -2q t
.
7
8 i t
. .
q t
i,
q = i = It t
.
V t
V=q/C: q q V 1 1 V 1 = C = = i = i t C t C t C t VC VL , VC=VL t
t . UE UB t t
. VCi : U E q = VCi = i C t (U E + U B ) E U E U B UE = UE + UB
= E + = 0 = t t t t t UB t UB q =i C t . - A = Aoe-t 1 1 1 2 DA2 E
= D(Aoe-t)2 E = D A o e-2t E = Eoe-2t 2 2 2 1 2 Eo= D A o 2
=
.
8
9
. F = -bu : W=- W=0- W=1 1 2 2 D Ao D A 2 2
. . : E E = PF = Fu = - buu = -bu2 = -bu2 t t F u . . 1 2 1 . (
) =2-1 x1=A1(t+1) x2=A2(t+2) 1
