Kéo một thùng hàng có khối lượng 30kg chuyển động đều trên mặt sân nằm ngang với lực kéo 200N theo phương ngang. a) Kể tên các lực tác dụng vào lực b) Biểu diễn các vecto lực. Kể tên

Các câu hỏi liên quan

VIII. Give the correct form of the verbs in brackets. (1,5p) 25. My dad (not like)..............coffee, he never (drink)......................... it. 26. Ba is short. He wishes he (be)..................... taller. 27. This house is empty. It (not live).................................. in for many years. 28. I hate (get)................................up early in winter. 29. Where (you spend)..........................................your holiday last summer? IX. Do as direct. (2,5p) 30. He didn't come to visit me,he didn't call me (Using "Neither... nor...") ............................................................................................................................... 31. He didn't work hard last time, he lost his job. ................................................................................................................................. 32. The man is over there. I told you about him. (combine the sentences) ..................................................................................................................................... 33. The students who did not come to the class yesterday explain their absence to the teacher. (reduced relative clause) ........................................................................................................................................ 34. My mother bought me a present on my birthday. (using cleft sentence) ..............................................................................................................................................