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Physics, 23.11.2021 14:40 Bidboidipper

Một vận động viên thểhình giữ một quả bóng thép nặng 3 kg trong tay. Cánh tay của anh ta dài 70 cm và có khối lượng 4 kg. Độ lớn của mô-men lực đối với vai anh ta là bao nhiêu nếu anh ta a. giữ cánh tay thẳng song song với sàn?b. giữ cánh tay thẳng nhưng chếch xuống 45° so với phương ngang?

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Một vận động viên thểhình giữ một quả bóng thép nặng 3 kg trong tay. Cánh tay của anh ta dài 70 cm v...

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