1 - 2
18
1. , t j = at2, a . 0 t.
2. m = 10 v0 = 800 /. , t . k = 0,25 /.
3. , . m , , . j . .
4. l = 0,2. ?
5. , 0 a - . , V1 V2.
3 - 4
18
1. d1 = 0,2 /2 d2 = 0,5 /2 d = 1 . .
2. Q, Dt = 10 R = 10 , , , J1 = 10 J2 = 0 .
3. , = 30 a = 30 , , q = 0,5t + 2. , , 150 . .
4. Ԓ = 0,67 . = 2500 , S = 10 2. , ?
5. l = 310 . , U = 1,7 . .
1 - 2
19
1. , . .
2. m t = 0 , w - . , , t.
3. 300 80 . 2 / . ? .
4. x x = 0,1 sin 6,28t (). .
5. n = 4 , DS = 23 /?
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3 - 4
19
1. , q = 3,54 ¼ . .
2. , R1 = 10 , J1 = 3 . R2 = 20 , J2 = 1,6 . - e .
3. d = 0,8 . . , J = 1 .
4. t = 60 ? . = 5800 .
5. l = 150 .
max .
1 - 2
20
1. j = 9t t3,, t - . .
2. m = 500 v0 = 16 /. t = 0 . Fc = 4v , v - , .
3. m1 = 240 m2 = 60 . v1 = 2 /. = 4 / . U . .
4. x = 5e-0,25t sin(p/2×t), . V t = , .
5. = 0,1 1 = 200 2 = 400 . Q, .
3 - 4
20
1. j = - y (2x + 3z), x, y, z - . .
2. J = J0sinwt. q, t, , J0 = 10 , w = 50p -1.
3. , J = 60 , d = 10 . , r1 = 5 r2 = 12 .
4. l0 , l = 400 Vmax 0,65 /.
5. , , p l = 555 ( ).
1 - 2
21
1. j =A Bt + Ct2, = 10 , = 20 /, = -2 /2. a , r = 0,1 , t = 4 c.
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2. v0 = 800 /. t = 0,8 v = 200 /. m = 10 . , k. .
3. 200 50 . 3 / . ? .
4. = 0. w = 4 /. 0 = 25 vx0 = 100 /. t = 2,4 .
5. m = 20 + 500 / . Q, 1 = 200 2 = 544 .
3 - 4
21
1. d1 = 0,4 /2, - d2 = -0,6 /2. , . .
2. Dt = 10 J1 = 1 A J2 = 2 5 . R .
3. = 0,1 , a = 45. = 4 . , .
4. l0 ( = 1,9 ). ?
5. l , u = 60 l¢= 25,4 ?
1 - 2
22
1. , . .
2. m t = 0 , w - . vmax ?
3. 200 2 80 . , , , 2 / .
4. , x1 2 v1 v2.
5. P = aV, a - . h . .
3 - 4
22
1. d = 0,5 . d1 = 0,2 /2 d2 = -0,3 /2. .
2. r = 1 ×. l = 0,2 , U = 4 ?
3. , , = 3 , . R = 5 . ?
4. l = 6 . .
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5. l , Dj = 1 .
1 - 2
23
1. , j = + Bt + Ct2 + Dt3, = 1 /, = 1 /2, D = 1 /3. R , , , , an = 3,46×102 /2.
2. m , . t = 0 . (t) .
3. 60 - 240 . 1 . , .
4. . S, .
5. V1 = 100 3. DU V2 = 150 3.
3 - 4
23
1. R = 10 q =1 . , r1 = 12 .
2. e = 1,6 r = 0,5 . J = 2,4 .
3. , S = 25 2, = 0,04 . , , , b = 30 .
4. U , l = 330 .
5. 0,5 60. .
1 - 2
24
1. , j j = bt2, b = 0,2 /2. t = 2,5 , v = 0,65 /.
2. m, , Fc = kv, k , v . v. v t.
3. 3 4 / . , , .
4. x = 0,1 sin 6,28 t. .
5. , = 80 , V1 = 1 V2 = 2 . DU , .
3 - 4
24
1. , j1 = 300 j2= 100 . v1 = 5×106 /.
2. R = 100 Jmax = 10 t = 30 . Q, .
3. , Dj = 2 , = 15,1 R = 1 . q/m .
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4. = 250 /2. lm ?
5. l = 20 u = 90. .
1 - 2
25
1. , t j = 2p (at bt2/2), a b . N .
2. m x Fx = -kvx, k . t = 0 x = 0 v0x. x(t) x t.
3. 40 60 , 2 4 /.
4. = 30 , , , Fmax = 1,5 . , = 2 .
5. V = 10 3 1 = 0,1 . 2 = 0,3 . DU .
3 - 4
25
1. d1 d2. , , . d1 = - 4d. d2 = 2d.
2. R q, J Dt?
3. j = 2 /2. R = 5 , , a = 30 .
4. lm1 lm2, , Dl = lm2 - lm1 = 500 . 2 , 1 = 2500 .
5. U = 0,8 . l .
1 - 2
26
1. j = at bt3, a = 6 /, b = 2 /3. t = 0 .
2. m, xy, , . , , .
3. vc , h = 1 . .
4. = 5 , = 4 . Vmax .
5. , V , 0 = 6×105 , a = 0,2 -3, V0 = 2 3. , V1 = 3 3 V2 = 4 3.
3 - 4
26
1. j = (x2 + y2) + Bz2, . .
2. 10 . 500 . , 10 .
3. S = 5 2, N = 1200 , J = 2 . = 10 . .
4. l , V = 1 /.
5. 1 = 2900 . , , Dlm = 9 . 2 ?
1 - 2
27
1. Dt = 10 c n = 300 -1. N , .
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2. m . t = 0 - , . t, , k .
3. 300 80 . 2 / . ? .
4. e2 50 . l?
5. n = 2 , .
3 - 4
27
1. R1 = 6
R2 = 10 q1 = 1 q2= -0,5 . , r = 5 . .
2. q, R = 3 U0 = 2 U = 4 Dt = 20 .
3. J1 = 50 J2 = 100 . d = 20 . , r1 = 25 r2 = 40 .
4. 1 2 , , 16 . lm ?
5. l0 = 275 . m , l = 180 .
1 - 2
28
1. n = 5 -1. Dt = 1 . N , .
2. m , - , w - . t = 0 - . t.
3. l = 3,5 m1 = 200 , m2 = 80 ? .
4. m = 5 x n = 0,5 . =3 . Fm, .
5. n = 2 , .
3 - 4
28
1. R 2R d1 d2. , , r. d1 = d, d2 = - d, r = 3R.
2. R = 20 6 Dt = 2 . Q , .