..
..
260201,260202,260203,260204,260401,260504,260302, 260501
2011
531
Ó .. . . ., , 2011.
" " , , . .
260201, 260202, 260203,260204, 260401, 260504,260302, 260501 .
..
: , , ..
..
Ó , 2011
109004, , , 73.
14
29
3..21
4..32
...39
1
(: )
1.1.
, , .
1.2. 2
1.3.
1. : , , , , , , , , , , .
2. , , . ?
3. ? .
4. .
5. . ?
6. .
.
1. ( ), .
|
|
2. :
- , ;
- ;
- , . ;
- : ) c, , , ; ) .
3. , . .
4. . .
1. , , .1, , F =2, q = 2 /, a = 2 .
.1
:
1. .
2. .
, .
. , RAX RY. , RBY.
Q .
.1, .
3. . RAX, RY, RBY .
Fix=0; RAX=0, (1)
Fiy=0; RAY Q +RBY F= 0, (2)
A (Fi)=0; Q∙a + RBY∙2a F∙3a =0. (3)
.
(3) RBY = (F3a + Qa)/ 2a =(2∙3∙2 + 8∙2)/2∙2 = 7.
(2) RAY = Q RBY + F = 8 7 + 2 = 3.
: RAX=0, RAY=3, RBY = 7.
, .
2. , AB CB , F=8 (.2.1).
.2.1
:
1.
2. .
: (F), (R), (R). .2.2.
. 2.2
3. . .
4.
1) ;
2) ;
5. .
. sin30O , cos30O
sin30O
cos 30O
------------------------------------------------------------------
RBC cos60O sin30O (3)
(3)
RAB (1)
|
|
RAB =
:
R , ..
1. , , .3, F =3, α=300, q = 2 /, =2, a = 1 .
.3
2. , , .4, F =2, α=300, q = 2 /, a = 2 .
.4
3. , A CB , F=10 (.5).
.5