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Physics, 25.11.2021 14:00 steven122048i

Cần trục quay với tốc độ không đổi 1 = 0,25 rad / s; đồng thời, cần hạ thấp cần nâng với tốc độ không đổi 1 = 0,40 rad / s. Biết rằng tại thời điểm thể hiện chiều dài của cần là 6m và đang tăng với tốc độ không đổi u = 0,5 m / s, xác định gia tốc của điểm B.

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Cần trục quay với tốc độ không đổi 1 = 0,25 rad / s; đồng thời, cần hạ thấp cần nâng với tốc độ khô...
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