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Консультация № 200043
06.01.2021, 20:59
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1
Здравствуйте! Прошу помощи в следующем вопросе:
Шлюпку подтягивают к причалу с помощью легкой веревки, которая наматывается на вал лебедки, совершающий 3 оборотов в секунду. Вал лебедки находится на высоте 2 м, радиус вала 0,12 м.
Найдите скорость шлюпки в тот момент, когда длина веревки равна 11 м.с Радиус вала считайте пренебрежимо малым по сравнению с высотой, на которой он находится .
Буду очень признателен за помощь
Шлюпку подтягивают к причалу с помощью легкой веревки, которая наматывается на вал лебедки, совершающий 3 оборотов в секунду. Вал лебедки находится на высоте 2 м, радиус вала 0,12 м.
Найдите скорость шлюпки в тот момент, когда длина веревки равна 11 м.с Радиус вала считайте пренебрежимо малым по сравнению с высотой, на которой он находится .
Буду очень признателен за помощь
Обсуждение
07.01.2021, 16:35
общий
это ответ
Здравствуйте, maks.zverkov.05!
Дано:
n=3c-1
H=2м
R=0,12м
L=11м
Найти: vл
Решение:
vл - скорость лодки;
vв - Скорость наматывания веревки;
[$945$] - угол между направлением движения лодки и направлением движения веревки.
1. vл=vв*cos[$945$] (1)
2. vв=[$969$]R = 2[$960$]nR (2)
3. [$945$]=arcsin(H/L) (3)
Отсюда, скорость лодки
vл=2[$960$]nR*cos[arcsin(H/L)]
vл[$8776$]2,2 м/с
С Рождеством
Дано:
n=3c-1
H=2м
R=0,12м
L=11м
Найти: vл
Решение:
vл - скорость лодки;
vв - Скорость наматывания веревки;
[$945$] - угол между направлением движения лодки и направлением движения веревки.
1. vл=vв*cos[$945$] (1)
2. vв=[$969$]R = 2[$960$]nR (2)
3. [$945$]=arcsin(H/L) (3)
Отсюда, скорость лодки
vл=2[$960$]nR*cos[arcsin(H/L)]
vл[$8776$]2,2 м/с
С Рождеством
5
Об авторе:
С уважением
shvetski
С уважением
shvetski
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