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13-01-2024
Engineering

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Câu 1: (2 điểm) Cho hệ lực như hình vẽ. Hãy xác định hợp lực R, vẽ biểu diễn R lên hình? biết F1 = 300 N, F2 = 200 N , F3 = 400 N, F4 = 300 N.

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