: x= 4 t, ; y= 16 t 2 - 1, . : t 0,5 = 0,5 c.
.
1. t=x /4 x y, = 2 - 1, ( 2).
, t : t=t 0,5 = 0,5 c,
x 0,5 = 40,5=2 ; y 0,5 = 160,52-1=3 .
0 , t : t=t 0 = 0 c,
x 0 = 40=0 ; y 0 = 1602-1=-1 .
0, .
2. , .
() vx vy .
; vx = = 4 /; vy = y = 32 t= 320,5=16 /.
: /.
3. , .
() .
ax= = vx = 4 = 0 /2; ay= y= vy = (32 t) = 32 /2.
: /2.
4.
/2.
+ M t 0,5 .
5.
/2.
6. ρ .
7. K : -1.
(, ), ,
, ρ =R R, ρ =∞ .
: .
2 . , . , . , , .
2 , ,
t 0,5= 0,5 4.
4
, | , / | , /2 | , | |||||||
x | y | vx | vy | v | ax | ay | a | a t | an | ρ |
2,0 | 3,0 | 4,0 | 16,0 | 16,5 | 32,0 | 32,0 | 31,0 | 7,8 | 35,0 |
.3.
|
|
, , . 5, 6.
5 .3
, | w OA, / | w1, / | e OA, /2 | u , / | , /2 | ||||
OA | r | AB | AC | ||||||
1,5 | |||||||||
w OA e OA ; w1 I (); u . |
6 .3
6
6