Physics, 19.10.2020 14:01 erjalinalii

в горизонтальном положении бревно длиной 18 м можно уравновесить на подставке, отстоящей на 3 м от его толстого конца. Если же подставка находится в 6 м от толстого конца, и на тонкий конец сядет рабочий массой 60 кг, то бревно снова будет в равновесии. Определите массу бревна.

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в горизонтальном положении бревно длиной 18 м можно уравновесить на подставке, отстоящей на 3 м от е...