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Physics, 22.07.2021 07:20 acamjackie25561
thả rơi tự do một quả tạ có khối lượng 5kg ở độ cao 8m xuống đất thì va chạm mềm với 1 cái cọc có khối lượng 2kg. xác định vận tốc của quả tạ và cọc ngay sau khi va chạm .lấy g=10m/s
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thả rơi tự do một quả tạ có khối lượng 5kg ở độ cao 8m xuống đất thì va chạm mềm với 1 cái cọc có kh...
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