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phuongnga13524
2 năm trước
Câu 5. Một công cơ học bằng 400J được thực hiện bởi một lực bằng 40N làm dịch chuyển một khối nặng dọc theo mặt phẳng nằm ngang. Quãng đường đã dịch chuyển là A. 1m. B. 100m. C. 10m. D. 0,1m.
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