Lúc 7 giờ hai ôtô cùng khởi hành từ hai điểm A B cách nhau 96km và đi ngược chiều nhau. Vận tốc của xe đi từ A là 36km/h và của xe đi từ B là 28km/h. a) Lập phương trình chuyển động của hai xe trên cùng một trục tọa độ và lấy A làm gốc chiều dương từ A đến B. b) Tìm vị trí của hai xe và khoảng cách giữa chúng lúc 9 giờ. c) Xác định vị trí và thời điểm lúc hai xe gặp nhau.

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