-
1. .
2. (1 2, 3 4) .
3. , , (), , , ( ), ( ).
4. , .
5. , , .
6. , , .
7. .
8. , .
9. , . . .
10. .
11. .
, , .
.
1. . , .
2. , , .
3. , , .
4. , , . , . , .
5. , , . ( ), , , . , . .
6. . , . .
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7. , . , .
8. , .
1. U = 0,8 . l . | ||
: U = 0,8 | ||
l =? | ||
, , ( = 5,29 ) | ||
2. , a = 1 /2. t1 =1c t2 =3c. | ||
: a = 1 /2 t1 = 1c t2 = 3c | a(t) t2 - t1 , (2.1) | |
-? -? | a(t) . | |
, (2.2) - . . (2.3) (2.3) (2.2), (2.1), : (/), /. | ||
3. V = 10 1 = 1 1 = 300 . , = 10 , 2 = 290 . 2 , . | ||
: V = 10 P1 = 1 1 = 300 = 10 2 = 290 | (3.1) | |
P2 =? | , (3.2) | |
1 2 . 2 =1 , (2.2) . (3.3) (3.1) (3.3) 2. . : 2 = 0,36 . | ||
4. q1 = 1 q2 = -2 d = 10 . , , q1 r1 = 9 q2 r2 = 7 . | ||
: q1 = 1 q2 = -2 d = 10 r1 = 9 r2 = 7 | , q1 q2 . (4.1) | |
-? | ||
. 4.1 . 4.1 , , (4.2) . (4.3) (4.3) (4.4) , /, (4.5) /. (4.6) (4.4), (4.5) (4.6) (4.2), 2/2. / = 3,57 /. : /. | ||
1 - 2
1
1. , a b . x = x(t), y = y(t).
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2. m1 = m2 = m v. 1= 39,24 . 2 .
3. , . . = 60 , m = 20 . , d , . l = 2 . . .
4. . v t = 4, .
5. , , , , 0 e .
3 - 4
1
1. R1 = 6 R2 = 10 q1 = 1 q2 = -0,5 . , r = 9 , .
2. l = 0,2 , U = 4 ? r = 1 ×.
3. R1 R2. J . . r < R2 .
4. l , Dj = 100 .
5. l = 6 . .
1 - 2
2
1. , a b . y(x).
2. R = 0,2 m = 5 . w t w = A + Bt, = 8 /2. F, .
3. = 240 m = 60 . = 2 /. = 4 / . U , , .
4. m = 5 n = 5 = 3 . v , x = 1,5 .
5. h0 , h h = 3000 . h/h0 = 280 , , .
3 - 4
2
1. +32 -32 12 . , 8 , .
2. Dt = 10 c J1 = 1 J2 = 2 Q = 5 . R .
3. J = 30 , . , r = 20 .
4. l0 = 275 . vm , l = 180 .
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5. 1 = 500 . 2 , n = 5 ?
1 - 2
3
1. - . S, 10 .
2. , , - , . .
3. h = 90 . .
4. , w, l p/4, y.
5. , 1 = 290 , , h . , .
3 4
3
1. d. . .
2. J = 4 + 2t. t1 = 1 c t2 = 4 ?
3. , B = a + bt2, a = 0,1 , b = 0,01 /, a = 20 , . . t = 5 .
4. l , = 1 .
5. , , lm = 580 . .
1 - 2
4
1.
, a b . y(x).
2. m = 10 R = 20 z, . j = + t2 + Ct3, = 4 /2, = -1 /3. z t = 2 c.
3. 1 , , , 2 . .
4. w , 1 2 v1 v2 .
5. V = 2 3 1 = 4 2 = 2 t = 27 . .
3 - 4
4
1. q1 = 7,5 q2 = -14,7 l = 5 . , =3 b = 4 .
2. V = 6 3 t = 1 Q = 216 . .
3. , , . ?
4. 1000 3000 . ?
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5. U , l = 330 .
1 - 2
5
1. - (). 10 .
2. 1 = 10 , 2 = 8 . D.
3. m , , , . , . , , .
4. , . v = 4 ∙ 107 /. = 1 . τ n .
5. V = 10 1 = 1 1 = 300 . = 10 , 2 = 290 . 2 , .
3 - 4
5
1. R1 = 6
R2 = 10 q1 = 1 q2= -0,5 . , r = 15 , .
2. J0 = 0 t = 10 . Q = 1 . , R 3 .
3. , . v = 4×107 /. = 1 . at an .
4. (l = 0,25 ). U = 1 . ?
5. 1 = 300 2 = 293 . lm, ?
1 - 2
6
1. xy : x = at, y = at(1-at), a a - , t . y(x).
2. (3, 10, 8) , 1 (1, 2, 3) 2 (3, 2, 1) . ?
3. h = 3 . V .
4. m = 50 x = Acoswt, = 10 w = 5 c-1. Fx, , wt = p / 3.
5. D = 10 . .
3 - 4
6
1. , l = 4 /. , r1 = 2 r2 = 3 .
2. , R = 3 U0 = 2 U = 4 t = 20 c.
3. l = 20 D = 3 N = 400 . .
4. l1 = 0,35 l2 = 0,54 2 . .
5. W, 1 c 1 2 , = 103 .
1 - 2
7
1. , a = 1 /2. t = 1c.
2. D = 75 m = 40 F = 1. b n t = 10 , r 12 .
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3. = 60 V = 1 / - . 20 . .