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Report a translation problem
V = 2 м3
pб = 2300 кг/м3 плотность бетона
pв = 1000 кг/м3 плотность воды
g =10 м/с2
найти
F
Fв
решение
вес плиты в воздухе F =mg =V*pб*g =2*2300*10 =46 000 H = 46 кН
вес плиты в воде Fв = F - Fa = V*pб*g - V*pв*g = Vg (рб - рв)=
= 2*10*(2300-1000) = 26 000 Н = 26 кН
ответ
F = 46 кН
Fв = 26 кН