Một người đi xe đạp từ từ lên một con đường dốc. Khối lượng tổng cộng của người và xe là 75 kg. Cho rằng lực ma sát cản chuyển động của xe là rất nhỏ. Độ dốc của mặt đường là 6% (độ cao của dốc bằng 6% độ dài mặt đường). Người này cần tạo ra một lực để kéo xe lên dốc là bao nhiêu?

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D. Writing I. Complete the second sentence so that it has a similar meaning to the sentence printed before it, begin with the given word(s) or phrase 1.You should review your lessons for the exam. It’s time____________________________________________________________________________________________________ 2. That man used to work with me when I lived in New York. That’s ______________________________________________________________________________________________________ 3. What a pity they close the shops at lunch-time. I wish ______________________________________________________________________________________________________ 4. We like ice-cream but we don’t have it everyday. Although ___________________________________________________________________________________________________ 5. When did you start working in that factory? How long ___________________________________________________________________________________________________ 6. Oil was slowly covering the sand of the beach. The sand____________________________________________________________________________________________________ 7. “Where is the station car-park?” Mrs. Smith asked. Mrs. Smith asked __________________________________________________________________________________________ 8. He was sorry he hadn’t said goodbye to her at the airport. He regretted _______________________________________________________________________________________________ 9. I advise you not to buy that car. If ____________________________________________________________________________________________________________ 10. Why don’t you ask her yourself? I suggest that _______________________________________________________________________________________________ II. Make full sentences based on given cues. 1. If you/ not go / the party /I /go / either. ………………………………………………………………………………………………………………………………………………………………………………………………………………… 2. Unless/ I / have/ quiet room/ I / not/ able /do / work. ………………………………………………………………………………………………………………………………………………………………………………………………………………… 3. nurse/ kind enough/ help him/ walk ………………………………………………………………………………………………………………………………………………………………………………………………………………… 4. He/ rather spend/ holidays/ a farm/ seaside ………………………………………………………………………………………………………………………………………………………………………………………………………………… 5. I/ return/ visit/ Japan. It/ wonderful trip. …………………………………………………………………………………………………………………………………………………………………………………………………………………