user-avatar
baochauchau260505
2 năm trước
Một vật được thả rơi tự do từ độ cáo 19,6m xuống đất, gia tốc rơi tự do là g= 9,8m/s2. a. Thời gian rơi của vật và vận tốc khi chạm đất là bao nhiêu? b. Tính vận tốc của vật khi còn cách mặt đất 9,6m
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Choose the word which has a different stress pattern from the other three in each question. 1. A. rubbish B. dislike C. money D. lucky 2. A. forgot B. early C. physics D. lesson 3. A. delay B. swimming C. money D. compass 4. A. creative B. interview C. equipment D. remember 5. A. overseas B. beautiful C. difficult D. miracle 6. A. backpack B. quiet C. feather D. pollute 7. A. greenhouse B. compass C. surround D. classmate 8. A. boarding B. judo C. pocket D. replace 9. A. uniform B. exercise C. bicycle D. excited 10. A. evening B. badminton C. already D. favourite Multiple choice Choose the word of phrase that best completes each sentence below. 1. Don’t buy _________ bread at the shop. There’s a lot of in the kitchen. A. any B. some C. a D. many 2. He _________ the cinema often. A. don’t goes B. doesn’t goes C. doesn’t go D. don’t go 3. Are there many tall trees in the park? “_________ ” A. Yes, there is B. Yes, there are C. Yes, it is D. Yes, they are 4. How often do you surf on the Internet? “_________” A. Yes, a lot B. Every day C. Yes, I do D. In my free time 5. How _________ your father _________to work? A. do – travel B. is - travel C. are – travel D. does – travel 6. We enjoy our summer camping _________ foreign friends. A. with B. of C. in D. at 7. What _________ Ba often do on Sundays? He plays soccer. A. is B. does C. do D. would 8. Minh often goes _________ in the mountains on the weekend. A. walking B. walks C. walk D to walk 9. My father is _________ man. A. a old B. an old C. not young D. not very young 10. He doesn’t have _________ money. A. a B.an C. some D. any 11. I sometimes _________ to the cinema. A. go B. goes C. going D. to go 12. Do you know where our new __________ is? Our teacher wants to meet him. A. poem B. classmate C. swimming pool D. gym 14. _________ Bobby often ________ physics experiment after school? A. Does – do B. Is – do C. Does – doing D. Is – does 15. Tom _________ football every weekend. A. studies B. has C. plays D. does 16. “_________ books are they?”_________ They’re mine. A. What B. Who C. Whose D. Which 17. At lunchtime, you can _________ lunch in the school canteen. A. be B. go C. do D. have

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team