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บทที่3 การหาแรงลัพธ์3.1 0x Wall Street English Online Wall Street English Online เรียนง่าย เห็นผลจริง มาตรฐานระดับโลก Wall Street English Open ช่อ ข้อสอบว 30201 ฟิสิกส์เ บทที่ 3 เรื่องแรง เวลา 0 นาที จำนวน 5 ข้อ คะแนนเต็ม 10 คะแนน 4 N F IN - = "F = 20N ลัพธ์ 30 Fy IN - - 0 Fx N F, = 5 N ลัพธ์ N 60 |N = - 10 N F - 6 N N Fลัพธ์ N 3 * = 8 N 60 N Hอ - N F. |N ลัพธ์ F2 = 15 N IN = 60 Fi = 20 N 15 N Fx = N บ Fลัพธ์ |N 0 37ง 53 20 N Fy N - 10 N 1น D 1 1 1 00

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Choicesะ a. on b. with C. up d. in e. across f. off 6. of h. for 1. Over j. at k. by 1. from m. to 1. 1 think the attendant was jนst piaying a tmck Matin. 2. ls there anything wrong พour new television set ? 3. 1"utn the radio 4 little, I can Scarcely hear the programme. 4. my opinion, every student is eqุuat. 5. It is surprising that the government succeed Solving that problem. (5. We Congratulated the winner his Success. 7. Lopking for a nty bo)k in the fihrary. } came an old forgotten research. 8. Wher) (ne fails : hay his bill, the company cut his electricity. 9 She is s) tired her life that she wants to commit suicide. 10. Do you know wh) หll be blamed the mistalke ? 11. ! rเรก arI old friend of mine the other day at tlหe grocer's. 12. 1e g:ts tup fatc the morming and ics trs bed vpry late ight. 13. They met their friends the corner the street six o'clock yesterday. 14. present many peopie die 15, She was born 1960 and went to school the age of five. 16. James g(es to school his father's car but Paul goes ioot. 17. The trairn leaving Chiengmai is at the railway station. 18. Today many people come to Bangkok husiness and holiday. 19. Thailand, cloth is usually sold meter. 20. The old lady has taken my umbrella mistalke, in the directory. will be pleased mc.

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EXERCISE Fill in the blanks with the given words. d. destroy C. ground a. polluted b. careful h. Dirty e. garbage f. floods g. Cut down It is clear that we are destroying our environment. We see (1) thrown in the river and on water in the canals of Bangkok. We find (2) land. We (3) to the WOod and then there are trees Use (4) We don't think of the future. We don't understand that we cannot (5) nature without serious consequences. We may Soon have no clean water. The air will be too (6) to breathe. The (7) will be hard and it will be impossible to grow anything. Let us be more (8) of this earth. It's the only one we have.

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Best Friends Hi, Im Julie and my best friend is Hanno, we are always together. We are both 13 years old and we are in the same class. Hanna lives in the same street as me ond we (like to spend our free time together. When we have 0 break in school we sometimes play skipping and sometimes we just sit and chat. We always walk home together and talk about our homework. When I am doing my homework and I don't understand a question, I often call Hanna for help and we do it together. After we have finished our homework we always chat on the computer before we go (to bed. We never go to sleep without speaking. At the weekends, we uรually go to the mall, Hanna always wants to go shopping but Ioften like to do other things, like skating or going to the cinema. We plan our day together and rarely disogree. She often sleeps over on Saturdays, we watch TV or a film together and we usually eat popcorn or sometimes we have o pizza. We both like to wear casual clothes, jean and t-shirts, and sometimes we swop clothes. IfI want to wear some jeans, I often borrow at-shirt from Hanno because she has some cool clothes. She never complains and she often borrows my caps. PHanna has a little brother, Charlie who nine years old. Sometime he can be annoying and he takes her things without osking her. Idon't have any brothers or sisters so Hanna is like my sister. Our parents often say we are like twinร as we are s0 alike. | Say True of False; Complete the gaps; 1. Hanna and Julie are cousins . 1.In school we เplay skipping. 2. We are 13 years old 2. We wolk home together. 3. Hanno lives next door to Julie . 3. We เ9o to sleep without speaking 4. They travel home from school by bus. 4. We disagree. 5. On Saturdays, they uรually g๐ to the Mall. 5. I borrow 0 T-shirt from Hannด 6. They often disagree about where to go. 6. She complains. 7. Hanno often sleeps at Julie's house on Saturdays. 7. Charlie is annoying. 8. Hanna sleeps over on Saturdays. 8. Julie hos o little brother . 9. We cat pizzos on Saturdays. 9. Julie hos cool clothes.. 10. On Saturdays, I, different things. like to do 10. Their parents say they are like twins.

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COMPARISON AS.AS 1. COMPLETE THE SENTENCES USING AS.AS & A WORD FROM THE B0X strong old expensive wide far deep hot heavy fast big 1.Jack can lift 150 kilos, and Steve can lift 150 kilos, too. Jack is as strong as Steve. 2.Doreen Simons weighs 52 kilos, and Laura Wayne weighs 52 kilos, too. Doreen is |Laura. 3. My new flat has three rooms. Janet's flat has three rooms, too. My new fat is Ther flat. 4. This computer costs $200. That computer costs $350. This computer is that computer. 5. Today's temperature is 25 Degree C. Yesterday's temperature was 25 Degree C, too. Yesterday was today. 6. Oxford Street is 40 meters wide. High Street is 40 meters wide, too. High Street is Oxford Street. 7. My car can do 240 kph, and my brother's car can also do 240 kph. my brother's car. My car is 8. My new neighbour is 40 years old, my uncle is 45 years old. My new neighbour is my uncle. 9. My village is 20 km away from the city, and yours is 20 km away, too. My Village is your village. 10. The well is 3 metres deep. The swimming pool is 3 metres deep, too. The well is the swimming pool taLIVEWORKSHEETS 2.MATCH THE ADJECTIVES AND THE NOUNS TO MAKE CORRECT IDIOMS 1. as white as a. a bee 2. as busy as b. snow

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They father 5) JS.1oung. photographs. Some people 6) e.throwngstreamers. They 7) 2re.havino. a great time. It's Carnival time. 7 Write the questions in pairs. Look at the pictures in Ex. 6 and answer them. 1 people / wear heavy clothes? > A: Are people wearing heavy clothes? B: Yes, they are. A 2 it rain? 3 John / dance? 4 people / buy presents? B) 5 Lucy / watch a parade? 6 the girls / wear masks? 7 the girls / dance? 8 Lucy's father / throw streamers? 9 people / have a great time? 8 In pairs ask and answer questions based on the postcards on p. 22. > A: Where's Bill?

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Read the text carefully. Years ago there wasn't a problem with rubbish because things like plastic and disposable nappies hadn't been invented. There wasn't so much packaging on items you bought either. But now with everything so over packaged wrapped and disposable we are suffering the consequences of far too much waste. The trouble is not everything can be recycled or will rot away. You used to be able to get a refund on glass bottles when you took them back to the shop. Now they are either collected from your house by the council or you can take them to a bottle bank. The fact that paper can be recycled and is easy to dispose is great, but remember paper is made from trees, which are important to the environment. The rainforests have been slowly disappearing for a while now. We need them not just because it helps with the climate. They are important as like all plants they give us oxygen. They are also a home to many animals who rely on them for their survival. The best waste is organic, dead leaves; carrot tops, onion skinร and so on all rot down and make fertile soil. This in turn will help the plants and vegetables giving them much needed food. So if youน are able to have a compost heap in your garden you'll be helping the environment and your garden wil love you for it. Acid rain is another serious problem it is damaging to plants and is caused by pollutants such as sulphur dioxide and nitrogen oxides. These come from the burning of coal, oil and gas. Dropping litter is not just a lazy thing to do it makes work for other people, is bad for the environment and looks ugly. So think before you drop litter either bin it or keep it and then bin it. When rivers and seas are polluted by waste we are not only stealing their beauty but were spoiling it for ourselves too. Our health can also suffer. Sadly accidents do occur; oil slicks sometimes happen and wreck the environment. Aninmals tend to suffer the most from these incidents. We should really have in place something that will prevent so much destruction, rather than just waiting for it to happen, then trying to clean up the damage. Nuclear waste has been the cause of controversy over the years. Radioactive material leaking out would be very serious indeed, it can cause real harm. This is why it is the most worrying. Although we are trying to stop the hole in the ozone layer getting any bigger, nuclear waste is still a serious problem. The 0zone layer protects us from harmful ultra - violet rays. Its hole has been caused by chlorofluorocarbons (cfc's) a chemical that was found in some products. Refrigerators used to contain them. So do we care enough about the earth we have inherited and our passing onto future generations? Or is it now all too late to do anything? Each one of us can make a difference and each and every one of us is responsible to the environment. It takes care of us; we should take care of it. Source: http://www.childrenswebmagazine.com/Environment.htm (slightly adapted) A) Say who or what the following words refer to. 7. these 1. them 8. it 2. they 9. their 3. them 10. these 4. นร 11. we 5. who 12. them 6. them 13. it

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Action Verbs Fomplete the sentences. 2. He 1. He rides the bicycle. pizza. 3. She on the street. 4. He alone 5. She beautifully. 6. They gracefully. I. Write your own sentence. 1. He rides the bicycle. 2. 3.

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Conversation Josh: Hi, Mike. Would you like to meet for dinner tonight? Mike: Sure. Where should we meet? Josh: There's a great all-you-can-eat restaurant below my gym. It's called The Open Table. Mike: Sounds good. Josh: Do you knoW where it is? Mike: No, I don't. Josh: It's on Market Street and Green. Take the subway, Line Nine. It's the quickest route. Get off at Market Station. Turn left when you get out, and walk two blocks. The restaurant's on the corner. Mike: OK, I got that. What time? Josh: Why don't we meet there around eight? And dont be late. I'm always starving after I exercise. Mike: OK. See you later.

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10. 1 went to the tibrary to get as many information as I could. (KKU: 2556) 1 2 3 4 11. She gave me some very good advise when she told me to buy that car. (KKU: 2556) 1 2 3 4 12. The police in that country does not carry guทs when they are in the street. (KKU: 2556) 1 2 3 4 13. Our population are made up of young people of different ages and old people of various 1 2 3 cultural backgroนnds. (KKU: 2555) 4 14. More than six million people in Germany suffer from Type 2 diabetes mellitus, 1 2 and the number of undiagnosed cases are equally high. (KKU: 2555) 3 4 15. For many first-year student the university may be their first experience living away from 1 2 3 home for an extended period of time. (KKU: 2555) 4 16. University classes are a great deal more difficult than high school classes as there are more 1 2 reading assignment, and the exams and papers COver a greater amount of material. (KKU: 2555) 3 4 17. University life demands a high level for self-organization because you have so much 1 2 3 freedom. (KKU: 2555) 4 18. Students who maintain a good relationship with his parents also have less trouble 1 2 3 academically than other students. (KKU: 2555) 4