25. 1. m = 300 H = 1,23 . t = 0,10 . F. , , a = 300 ? , ?
: F = 
+ m g = 32 .
F cos a = 28 . F = 
+ m g = 18 .
25. 2. m1, , m2 v2 a . .
: v1 = (m2 / m1) v2 cos a.
25. 3. F , , , v? m, l.
: F = m g (1 + v2 / (l g)).
25. 4.* v0. H . . t, v ?
: t = 
; v = 
.
25. 5. A m = 2,0 h = 1,0 a =3,0 /?
: A = m (g + a) h 26 .
25. 6. A , l = 20 m = 3,0 ?
: A = m g l / 2 0,29 .
25. 7. A S = 75 , m =1,30 t = 10 , m = 0,050?
: A = m (2 S / t2 + m g) S 2,0102 .
25. 8. h l . v0. v , .
: v = 
.
25. 9. v = 60 /. , , . N ? m = 2000 . a = 0,050.
: N = 2 m g v a 33 .
25. 10. M = 600 , , m = 60 . S , v = 40 /? , , N = 1,0 .
: S = 
3,0102 .
25. 11.* . N, , m, v? .
|
|
|
: N = m g v / 2.
25. 12. m = 3 h = 3 , . x , k = 700 /. .
: x = 
0,5 .
25. 13.* k = 70 / , . , , . x , h = 50 ? m = 200 .
: x = 
20 .
25. 14.* m k M (. 59). . . , . h , ? .
: h ³ 
.
25. 15. m = 1 v = 5 /. , v2 = 3 /, a = 530 . 
1 ?
: v1 = 4 /; 1 a1 = 370.
25. 16. M. v0 m , . v ?
: v = 
.
25. 17.* m = 1,0 , F v , F v = P = 50 ( ) / .
) , t1 v1 = 10 / .
) , v = v(t).
) S, t1.
:
) t1 = 
1,0 . ) v = 10 
, ) S 6,7 .
25. 18.* , R, M. m . v , ? x ? S ?
: v = 
; x = 
; S = R (
1).
25. 19. . T . m = 50 , r =
5,0 . .
:. T = 
3,6 .
25. 20. a , a . l, .
:. T = 2 p 
.
25. 21*. m l k (. 60). . . .
|
|
|
:. T = p 
.
25. 22*. 61 aX , x, , . t ? v ?
:
t = 
0.31 , v = 
0,4 .
: a0 = 2 / x 0 = 0,08 .
25. 23. M = 10 . m = 10 , v = 500 / . A = 10 . T.
:. T = 2 p A (M + m) / (m v) 1,3 .
25. 24. k =32 / 500 . , , ?
: x = x0 (1 coswt), x0 = m g / k 15 , w = 
8,0 -1.
25. 25*. M m, k (. 62). , . t x ?
: x = x0 cos(w t), x0 = 
, w = 
.
25. 26. , , . A, m. n ?
: n £ 
.
 |
I ...................................................................................... 3
1. ............................................................................................. 3
2. , 5
3. ......................................................................... 6
II ............................................................................. 9
4. - ............................................................... 9
5. ...................................................... 13
6. , .................................................. 18
7. .............................................................................. 20
8. ................................................................................. 22
9. , .................................... 24
10. .................................................. 26
11. .............................................................. 33
12. .......... 37
III .............................................................................. 40
13. - .............................................................. 40
14. .............................................. 43
15. ............................................................ 47
16. ......................................................................... 52
17. .................................................. 59
18. ..................................................................................... 65
19. ......... 67
IV ....................................................... 71
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20. - ................................................................. 71
21. ..................................................... 73
22. , , ................................................................. 81
23. .............................. 91
24. .................................................................... 98
25. ............................................ 105
,
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..
27.09.04. 60×84 1/16
.. . . 8,0. .-. . 8,0. .
. 100 .
...
, . -, 4. .: 38-19-14.
