Предмет: Физика, автор: Lora121

Кусок сыра бросили на весы. Три последовательных крайних положения стрелки весов были: А1 = 560 г, А2 = 440 г, А3 = 520 г. Какова действительная масса  куска сыра? Найдите коэффициент затухания весов.

Ответы

Автор ответа: Аноним
0

Сначала определяем положение равновесия весов с грузом. Используем правило Гаусса:

m₀ = (m₁ + 2m₂ + m₃)/4 = (560+2·440+520)/4 = 490(г) - это и есть действительная масса куска сыра.

 

Отклонения от положения равновесия двух амплитуд затухающих колебаний, разделённых периодом

А₁ = m₁ - m₀ = 560-490 = 70

А₃ = m₃ - m₀ = 520-490 = 30

Определим показатель затухания - логарифмический декремент

δ = ln A₁/A₃ = ln 70/30 = 0,847

Для определения коэффициента затухания необходимо знать период колебаний.

Тогда коэффициент затухания определится по формуле

β = δ/Т

 

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