Колебания и волны (10-11) Flashcards

1
Q

Уравнение координаты

A

x(t) = xmax cos(ωt + φ0)

xmax - амплитуда, может обозначаться А, ω - здесь циклическая частота, φ0 - начальная фаза

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2
Q

Уравнение скорости

A

v = x’ = -ωxmax sin(ωt + φ0)

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3
Q

Уравнение ускорения

A

a = v’ = x’’ = -ω2xmax cos(ωt + φ0)

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4
Q

Связь периода с циклической частотой

A

T = 2π/ω

формула из движения по окружности

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5
Q

Амплитудное значение скорости

A

vmax = ωxmax

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6
Q

Амплитудное значение ускорения

A

amax = ω2xmax

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7
Q

Период колебания пружинного маятника

A

T = 2π√(m/k)

“Мортал Комбат”

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8
Q

Период колебания нитяного маятника

A

T = 2π√(l/g)

“Леди Гага”

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9
Q

Длина волны

A

λ = vT = v/ν (скорость делить на частоту)

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10
Q

ЗСЭ для колебаний

A

Eкmax = Eпmax

mv2/2 = mgh

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