Câu hỏi trên thuộc đề trắc nghiệm dưới đây ! Số câu hỏi: 40
7- Khi ô tô đang chạy với vận tốc 10 m/s trên đọan đường thẳng thì người lái xe tăng ga và ô tô chuyển động nhanh dần đều. Sau 20 s, ôtô đạt vận tốc 14 m/s. Gia tốc a và vận tốc v của ô tô sau 40 s kể từ lúc bắt đầu tăng ga là bao nhiêu ? Page 2Lớp 10 >> Tiếng Anh >> || Grammar Test English PracticeCó 689 bài trong 69 trang (10 bài/trang) và bạn đang ở trang 1.
Choose the best answer (A, B, C or D) that best completes each sentence.Example:We _________ to the beach yesterday if the sun had been shining. A.will go B.would go C.would have gone D. had gone
Choose the best answer (A, B, C or D) that best completes each sentence.Example:Cuc Phuong National Park __________ over 200 square kilometers of rainforest.A. contains B. gets C. hold D. covers
Choose A,B,C,or D that best completes each unfinished sentence:Example:He expected us ___________ him a job. A. offering B. to offer C. offer D. to be offered
Choose A,B,C,or D that best completes each unfinished sentence:Example:For a long time, the earth ___________to be flat.A. had believedB. had been believingC. was believed D. was been believed
Choose the correct option a, b, c or d to complete this passage.Dolphins are known as marine (1) ______they breathe air, they are warm-blood, and they bear live young ones called (2) ______ The size of dolphin is very greatly. (3)______ smallest dolphins are just about 50 kg in weight and 1.2 meters in length (4) ______the largest one can weigh up to 8.200 kg and is 10 meters long. Dolphins are sociable creatures. They swim together in group known as (5) ______They show great ability in the water. Dolphins are interested (6) ______humans and often rescue people in the sea (7) ______are in danger. They are intelligent creatures and make sounds to (8)_____ with each other. Scientists have studied dolphins (9) _____many years and are now looking into the possibility of dolphins that are able to carry (10) _____ tasks under the sea.
Choose the one word or phrase - A, B, C or D - that best completes the sentence.Example:If I ___________ you, I wouldn’t buy that coat.A. amB. was C. were D. would be
Choose the one word or phrase - A,B, C or D - that best completes the sentence:Example:After it __________ dry for two months, it rained heavily last night.A. was B. would be C. had been D. has been
Choose the one word or phrase - A, B, C or D - that best completes the sentence.Example:About 120 people _________ with the virus of bird flu since it _________ in Asia in 2003.A. have infected/ spread B. were infected/ has spread C. have been infected/ spread D. have been infected/ was spread .
Choose the one word or phrase - A,B, C or D - that best completes the sentence:Example:He came in tired and hungry and badly __________ need of a bath.A. for B. toC. on D. in
Select the synonym of the following bold and underlined word in each sentence.Example: They tried to find a way of bettering their lives. A. moving B. changing C. achievingD. improving 10 bài/trang 15 bài/trang 20 bài/trang 25 bài/trang 30 bài/trang 35 bài/trang 40 bài/trang 50 bài/trang 100 bài/trang Mới đến cũ Cũ đến mới A đến Z Z đến A Số lần xem thấp --> cao Số lần xem cao --> thấp 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869 2 3 4 5 ... 69
Chọn đáp án C Cách 1: Cách lớp 10 (Chưa học đạo hàm). x=10t+4t2→So sanhx=x0+v0t+12at2⇒v0=10m/sa=8m/s2 Thay vào công thức vt=2s=v0=at=10+8.2=26m/s Cách 2: Cách lớp 11 (Đã học đạo hàm). x=10t+4t2⇒v=xt=10+8t→t=2v=26m/s CÂU HỎI HOT CÙNG CHỦ ĐỀ
Phương trình chuyển động của một chất điểm có dạng:x = 10t + 4t2 (x:m; t:s).Vận tốc tức thời của chất điểm lúc t= 2s là: a.28m/sb.18m/sc.26m/s d.16m/s
x=10t+4t2=>xo=10m/s; a=8m/s2=>v=vo+atvới t=2s ta có: v=10+8.2=26 m/s =>C
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