Hai ôtô khỏi hành tại cùng 1 vị trí, chuyển động thẳng đều theo cùng 1 chiều. Ôtô 1 có vận tốc v1=45km/h. Ôtô 2 có vận tốc v2=63km/h nhưng khởi hành sau ôtô 1 là 2h. a) Viết phương trình chuyển động của 2 xe và vẽ đồ thị tọa độ của 2 xe trên cudng một hệ trục. b) Tìm vị trí và thời điểm mà 2 xe gặp nhau..

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