Предмет: Физика, автор: piupiupiu69

Физика, 7 класс.
Объем человеческого тела 0,06 м3, а средняя плотность 1070 кг\м3. С какой силой человек давит на дно реки, погрузившись до половины своего объема?

Ответы

Автор ответа: Alina2015г

бъём человеческого тела 0.06м куб,а средняя плотность 1070кг на м куб.с какой силой человек давит на дно реки.погрузившись до половины своего объёма? а)400Н б)3450Н в)1920Н г)246Н д)342Н

P1=p1*g*V=1070*10*0,06=642 Н
Fa=p2*g*V/2=1000*10*0,03=300 Н
P=642-300=342 Н - ( ответ д)

piupiupiu69: Извините, а Р1 и Fа - это что? ( вес тела и архимедова сила?)

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