Cho vật có khối lượng 10 kg . Được kéo lên theo phương thẳng đứng với độ cao 50dm2 và hết thời gian là 2/3 phút . Tính công suất.

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Exercise 3. Put the verbs in brackets into the correct tenses. 1. ___________ (Mai/go) to school every day? ~ No, she (go) _______ to school from Monday to Friday. 2. The teachers at our schools (give) __________ us lots of homework. 3. I promise that I (not be) _______ late for school again. 4. _________ (you/eat) fried chicken last night? 5. I often (drink) ____________ Coca Cola when I was a child. 6. Phuong (not have) __________ many new friends in his new school. 7. My younger sister (be) __________ ten on her next birthday . 8. Minh (watch) ____________ television every night. 9. We (not see) ___________ Beth at Mike's house yesterday morning. 10.Mr Dass (leave) _________ for New York late last night. Exercise 4. Write sentences, using the words given. 1. Phong/ eat/ lots of/ junk food/ so/ he/ putting/ weight. ______________________________________________________________________ 2. I/ exercise/ daily/ because/ I/ want/ stay/ healthy. ______________________________________________________________________ 3. Sitting/ too/ close/ the TV/ hurt/ your eyes. ______________________________________________________________________ 4. She/ often/ take/ paracetamol/ if/ she/ get / bad/ headache. ______________________________________________________________________ 5. How many calories/ you/ burn/ do/ aerobics/ 2 hours? ______________________________________________________________________? 6.How old/she/be/her/next birthday? ______________________________________________________________________? 7.Would/you/like/see/movie? ______________________________________________________________________? 8.She/live/Tran Hung Dao Street/her aunt/uncle. ______________________________________________________________________ 9.I/live/12 Tran Phu Street. ______________________________________________________________________ 10.How far/it/your house/ school? ______________________________________________________________________?