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Spanish, 18.10.2021 14:00 davidtemple

Câu 4: Phương trình chuyển động của một chất điểm trong hệ tọa độ Oxy là x =2t (cm); y= 3t2 (cm). Khoảng cách từ chất điểm đến gốc toạ độ tại thời điểm t = 2s là:
A. 12, 65 cm. B.40cm. C. 52 cm. D. 7, 21 cm

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Câu 4: Phương trình chuyển động của một chất điểm trong hệ tọa độ Oxy là x =2t (cm); y= 3t2 (cm)....
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