Предмет: Физика, автор: mashykolittlefox

Чи однакову роботу треба виконати, щоб видовжити пружину з 2см до 5 см і з 5см до 7см?

Ответы

Автор ответа: Natashka335
1

Ответ:

Нет, разную

Объяснение:

W = (1/2) * k * (x^2 - x₀^2)

где k - коэффициент упругости пружины, x - конечная длина пружины, x₀ - начальная длина пружины.

По условию задачи:

Изначальная длина пружины x₀ = 2 см = 0,02 м

Длина пружины после первого растяжения x₁ = 5 см = 0,05 м

Длина пружины после второго растяжения x₂ = 7 см = 0,07 м

Мы будем считать, что коэффициент упругости пружины остаётся постоянным.

Теперь мы можем вычислить работу для каждого случая:

Для растяжения от 2 см до 5 см:

W₁ = (1/2) * k * (x₁^2 - x₀^2) = (1/2) * k * ((0,05)^2 - (0,02)^2)

Для растяжения от 5 см до 7 см:

W₂ = (1/2) * k * (x₂^2 - x₁^2) = (1/2) * k * ((0,07)^2 - (0,05)^2)

Таким образом, работа, необходимая для растяжения пружины от 2 см до 5 см, и работа, необходимая для растяжения пружины от 5 см до 7 см, будут различными, так как они зависят от разных изменений длины пружины.

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