, dA=Fds, , F ds.
- (), .
, , .
, =mv2/2, .
F, .
, .
:
1)
2)
3) - .
5.2. .
, , , .
0.
, , .
.
, - (x, y, z, t), .
.
, .
5.3. .
5.4. .
1) : (h)=-gm1m2/r
2) : (x)=kx2/2.
5.5. .
F=-∇.
Fxdx=-d.
z z, .
5.6. .
, , .
, , .
, , .
.
6.1. .
, , .
F=-kx .
.
, F=-kx x=a*cos(w0t+a), .
.
a t0.
.
- , .
|
|
w0 w0=2p/.
6.2. .
, , , .
6.3. .
.
=|2acos(Dw/2)*t|.
.
6.4. .
x=a*coswt, y=b*cos(wt+a), a - .
: x2/a2 + y2/b2 - (2(xy)/(ab))*cosa=sin2a.
1) a=0: y=bx/a - . - w =Öa2+b2.
2) a=p: (x/a+y/b)2=0 Þ y=-(b/a)*x - .
3) a=p/2: x2/a2+y2/b2=1.
, - , .