Một chất điểm chuyển động thẳng đều dọc theo trục tọa độ Ox có phương trình chuyển động dạng: x = 40 + 5t (x tính bằng mét, t tính bằn g giây). a) Xác định tính chất chuyển động ? (chiều, vị trí ban đầu, vận tốc ban đầu) b) Định tọa độ chất điểm lúc t = 10 s. c) Tìm quãng đường chất điểm đi được trong 10 giây đầu tiên?

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VI. Complete each of the following sentences so that it means the same as the original sentence. 13. Study hard and you will pass the exam. ............................................................................................................................................................ 14. Be careful or you’ll cut yourself with that knife. ............................................................................................................................................................ 15. Save money or you won’t be able to buy the house. ............................................................................................................................................................ 16. Ask him first and he will offer to help. ............................................................................................................................................................ 17. Be calm or you’ll make a wrong decision ............................................................................................................................................................ 18. You sing well and everyone will clap their hands. ............................................................................................................................................................ 19. She is lazy so she can’t pass the exam. ............................................................................................................................................................ 20. He will pay me tonight; I will have enough money to buy a car. ............................................................................................................................................................ 21. He smokes too much; that’s why he can’t get rid of his cough. ............................................................................................................................................................ 22. She is very shy, so she doesn’t enjoy the party. ............................................................................................................................................................