ВХОД | РЕГИСТРАЦИЯ

Задача №10.7

Условие

При соответствующем выборе осей координат уравнения движения электрона в постоянном магнитном поле определяются равенствами x=asinkt, у=acoskt, z=vt, где a, k и v — некоторые постоянные, зависящие от напряженности магнитного поля, массы, заряда и скорости электрона. Определить траекторию электрона и закон движения его по траектории.

Решение





Предыдущая задача №6
Движение точки, описывающей фигуру Лиссажу, задается уравнениями x=3sint, y=2cos2t (t — в секундах). Найти уравнение траектории, вычертить ее и указать направление движения точки в различные моменты времени. Указать также ближайший после начала движения момент времени t1, когда траектория пересечет ось Ox.
Следующая задача №8
Гармонические колебания точки определяются законом x=asin(kt+ε), где a>0 — амплитуда колебаний, k>0 — круговая частота колебаний и ε (-π≤ε≤π) — начальная фаза. Определить центр колебаний a0, амплитуду, круговую частоту, период T, частоту колебаний f в герцах и начальную фазу по следующим уравнениям движения (x — в сантиметрах, f — в секундах):
1) x = -7 cos 12t.
2) x = 4 sin (πt/20) - 3 cos (πt/20).
3) x = 2 - 4 sin 140t.
4) x = 6 sin2 18t.
5) x = 1 - 4 cos2 (πt/60).
Источник: Решебник Мещерского 12 класс
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1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
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2.55
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
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3.10
3.11
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4.1
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5.1
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6.1
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7.1
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8.1
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9.1
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10.1
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11.1
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12.1
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13.1
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14.1
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15.1
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16.1
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17.1
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18.1
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19.1
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20.1
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20.13
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21.2
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22.1
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23.1
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23.65
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23.71
24.1
24.2
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24.4
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24.6
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24.34
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25.1
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26.1
26.2
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26.35
27.1
27.2
27.3
27.4
27.5
27.6
27.7
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27.32
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27.34
27.35
27.36
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27.42
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27.47
27.48
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27.50
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27.54
27.55
27.58
27.59
27.60
27.61
27.62
27.63
27.64
27.65
28.1
28.2
28.3
28.4
28.5
28.6
28.7
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29.1
29.2
29.3
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29.6
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30.1
30.2
30.3
30.4
30.5
30.6
30.7
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30.30
31.1
31.2
31.3
31.4
31.5
31.6
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31.8
31.9
31.11
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31.15
31.16
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31.20
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31.25
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31.27
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31.32
31.33
31.34
31.35
32.1
32.2
32.3
32.4
32.5
32.6
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32.11
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32.13
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32.15
32.16
32.17
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32.26
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32.31
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32.35
32.36
32.37
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32.48
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32.50
32.51
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32.53
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32.55
32.56
32.57
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32.60
32.61
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32.64
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32.66
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32.71
32.72
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32.74
32.75
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32.81
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32.84
32.85
32.86
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32.89
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32.91
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32.96
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32.100
32.101
32.102
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32.105
32.106
32.107
33.1
33.2
33.3
33.4
33.5
33.6
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34.1
34.2
34.3
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34.5
34.6
34.7
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34.31
35.1
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36.1
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37.1
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37.4
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37.11
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37.59
38.1
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38.4
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38.53
39.1
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40.1
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41.1
41.2
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42.1
42.2
42.3
42.4
42.5
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43.1
43.2
43.3
43.4
43.6
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44.1
44.2
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45.3
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45.5
45.6
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46.1
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46.5
46.6
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47.1
47.2
47.3
47.4
47.5
47.6
47.7
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48.1
48.5
48.6
48.7
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48.12
48.13
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48.19
48.23
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48.35
48.38
48.40
48.41
48.42
48.43
48.44
48.48
48.49
49.1
49.2
49.3
49.4
49.7
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49.11
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49.16
53.5
53.12
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53.16
54.1
54.2
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54.4
54.5
54.6
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54.18
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54.32
54.33
54.35
55.2
55.3
55.4
55.5
55.6
55.7
55.8
55.9
55.10
55.11
55.12
55.13
55.14
55.15
55.16
55.21
55.25
55.38
55.41
55.44
56.3
56.7
56.9

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