October 2021 1 10 Report
задача для 7 класса. Высота наклонной плоскости равна 1,2 м, а длинна 10,8м .Для подъёма по этой наклонной плоскости груза массой 180 кг потребовалась сила 250 H. Определите КПД наклонной плоскости и силу трения.
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