July 2022 1 12 Report
Механизм для забивания свай поднимает чугунную «бабу» массой 500 кг 120 раз в минуту на высоту 60 см. Мощность механизма — 8,82 кВт. Определи коэффициент полезного действия механизма.

Принятьg=9.8Н/кг.

Ответ (округли до целого числа): η≈%.
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