Ответ:
14.9 P=mg=16*10=160H
15.14 Fтр = u * N = 0,3 * 10 = 3 Н
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Ответ:
14.9 P=mg=16*10=160H
15.14 Fтр = u * N = 0,3 * 10 = 3 Н