Hai đoàn tàu chuyển động ngược chiều nhau. Tàu 1 chuyển động nhanh dần đều, tàu 2 chuyển động chậm đần đều. Hỏi hướng của vectơ gia tốc của hai tàu thế nào?

Các câu hỏi liên quan

I. Change these sentences into PASSIVE VOICE. 1. Does Jack learn English here twice a week? .......................................................................................................................................... 2. Is she making big cakes for the party? .......................................................................................................................................... 3. Has your father repaired the car? .......................................................................................................................................... 4. Must we finish the test before ten? .......................................................................................................................................... 5. Will buses bring the children home? .......................................................................................................................................... 6. Why didn't Huong help Hoa at that time? .......................................................................................................................................... 7. When did they decorate your kitchen? .......................................................................................................................................... 8. How do people pronounce this word? .......................................................................................................................................... 9. How many games has the team played up to now? .......................................................................................................................................... 10. Who looked after the children for you? ..........................................................................................................................................