, t ,
DT=yDT,
DT , ;
y -- , t r.
( )
r3 = vR/2a, = v2 t/4a
( )
, 
.
, , (y1).
y:
. . , , , , . .
D=DT - D
DT = DT y(t),) t
);
DT = DT y(t), t , .. ,
.
DT= DT [y(t) - y(t)].
y(t) 1
DT= DT [1 - y(t)].
. , .
, 0
, . 1, . (,) 1, r1 r2.
,
; 
.
.
. . , , .
.
, , , .
|
|
|
 |
, , . , .
y z .
1. n ti, t1 = 0 .
2. D , = + D. D(x,y,z)
xi = - v ti .
3.
T(t) .
 | |||
| |||
, .
1. Tmax.
2. t1 T1<Tmax.
3. w w 1 2.
w = (1 - 2)/t; w = (2 - 1)/t .
.
