Предмет: Физика, автор: Dasha271205

Вычислите архимедову силу, действующую на алюминиевую деталь объёмом 1000 см3, помещенную в машинное масло. Плотность машинного масла 900 кг/м3. Плотность алюминия 2700 кг/м3.


89180035052roman: 0,9h

Ответы

Автор ответа: Regent1828
9

Выталкивающая сила, действующая на погруженное в жидкость тело, численно равна весу данной жидкости в объеме погруженной части тела:

        Fₐ = ρgV, где ρ = 900 кг/м³ - плотность масла

                                  g = 10 H/кг - ускорение своб. падения

                                  V = 0,001 м³ - объем погруж. части тела

Тогда:

         Fₐ = 900 · 10 · 0,001 = 9 (Н)

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Если нужно: сила, необходимая для удержания тела в масле:

         F = F(т) - Fₐ = mg - Fₐ = ρ(ал)gV - Fₐ =

                             = 2700 · 10 · 0,001 - 9 = 27 - 9 = 18 (H)

                                     

Автор ответа: ilhaalexandrowich
2

Ответ:

Ответ : 0,9 Н

Объяснение:

V - объем тела ( 100 см³ = 0,0001 м³ )

g - ускорение свободного падения ( 10 Н / кг )

p - плотность машинного масла ( 900 кг / м³ )

F - сила Архимеда ( ? )

F = p * g * V = 900 кг/м³ * 10 Н / кг * 0,0001 м³ = 0,9 Н

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