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Alexandra335
Alexandra335
13.06.2020 10:08 •  Физика

Выполняя рывок, тяжелоатлет поднял гирю массой 200 кг на 2 м за 1 сек какую мощность он развил?

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Ответ:
Inna21032002
Inna21032002
13.06.2020

N=A/t=FS/t=mgS/t=200*2*10/1=4000 вот так

4,6(79 оценок)
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Ответ:
1) Масса  ОЛОВА в КУБ1? 
44.5*40%*7,3 = 129,94 ~130 г
2) Масса свинца = 44,5*0,6*11,3 = 301,71 ~302 г
3)ОБЩАЯ масса КУБ1= 431,65 ~432 г.
4) Делаем НОВЫЙ КУБИК. массой 432 г, но из ПОС-60.
Решаем уравнение
(0,6*7,3 +0,4*11,3)*У = 432 - 60% олова и 40% свинца весят 432 г.
Отсюда У =(4,38+4,52)*У       У=48,5. Проверка 212,43+219,22=431,65 - такая же масса.
5) Объем олова - делим на плотность = 212,43/7,3=29,1 см3
Объем свинца - 219,22/11,3=19,4 см3
6) Объем НОВОГО куба = 29,1+19,4=48,5 см3
ПОНЯТНО, ведь ЛЕГКОГО олова стало БОЛЬШЕ.
А ведь этот результат мы получили В ЧЕТВЕРТОЙ СТРОКЕ,ГДЕ РЕШАЛИ УРАВНЕНИЕ РАВНЫХ МАСС.
ответ:  Объем из ПОС-60 имеет объем 48,5 см3
4,4(84 оценок)
Ответ:
ррррр84
ррррр84
13.06.2020

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Хз как правильно это расписать
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