July 2022 1 11 Report
Мотор экскаватора имеет мощность 14,7 кВт. За час экскаватор поднял 200 т земли на высоту 1,7 м. Каков коэффициент полезного действия экскаватора?

Принять g=9.8Нкг.

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