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Physics, 19.10.2021 22:50 globalremix

6. Lúc 7h sáng một chất điểm chuyển động thẳng, phương trình tọa độ của chất điểm có dạng:x = –30 + 60t (x: km; t: h). Mốc thời gian lúc 7h, chất điểm chuyển động ngang qua gốc tọa độ lúc nào?

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6. Lúc 7h sáng một chất điểm chuyển động thẳng, phương trình tọa độ của chất điểm có dạng:x = –30 +...
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