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物理 大学生・専門学校生・社会人

至急!!わからないので教えていただきたいです!

平面から30°傾いた斜面X と, 45°傾いた斜面 Y が水平面の両側になめらかにつな がっている。水平面上のBC間には摩擦があるが, それ以外の水平面および斜面 X,Y は なめらかである。 BC間の距離は2hで, 小物体とBC間の水平面との間の動摩擦係数は 4 である。また、小物体の運動は同一鉛直面内で行われるものとし、 重力加速度の大き さをgとする。 下図のように、斜面X 上で水平面からの高さがんの点Aに質量mの小物体を置き, 静 かにはなしたところ, 小物体は斜面上をすべり下りて、 水平面上を点Bへ向かった。 斜面 X 斜面 Y A m h 小物体 1 2 - mg 2 30℃ 1ERSON √3 2 2h (1) 次の文章中の空欄 ア エに入れる式として最も適当なものを,下の①~⑨の うちからそれぞれ一つずつ選び, 番号で答えなさい。 但し, 同じ番号をくり返し選んで もよい。 小物体が斜面上をすべり下りているとき, 小物体にはたらく重力の斜面に沿った方 向の分力の大きさはア垂直抗力の大きさはイである。 このとき, 小物体が斜 面上を点Aから最下点まで移動する間に重力が小物体にする仕事はウ 垂直抗力 が小物体にする仕事はエである。 mgh √√3 2 B 水平面 mg mgh mg C ⑧ mgh 50 (3) 28.3 ④2mg ⑨2mgh 245゜ 8110 (2)点 B に達する直前の小物体の速さはいくらか。 最も適当なものを、次の①~④のうち から一つ選び、番号で答えなさい。 high ②√gh igh 0 4√2gh

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TOEIC・英語 大学生・専門学校生・社会人

自分の回答と照らし合わせて確認したいので、答えがなにになるかどなたか教えてください。 解説もあると助かります。

5 A Matter of Taste Reading Passage 042 At the age of just 22, Jamie Oliver became well known across the UK as "The Naked Chef." He called himself this not because he cooked wearing no clothes, but because he wanted to simplify food preparation so that everybody could follow his recipes. He wanted to "strip down" the idea of cooking. Since then he has had numerous TV shows, published 50 many books, and has become a household name in the UK. Today, one of the activities Jamie Oliver is best known for is his great effort to improve the school dinners that children eat every day. One day, he visited the kitchen of a typical London secondary school, and he was shocked to see how much processed junk food the kids were given to eat each day. Fat and sugar levels were extremely high, and nutritional values very 10 low. The "turkey twizzler" became the symbol of these unhealthy meals: processed meat containing 21.2% fat and only 34% actual turkey. Oliver ran the school kitchen for one year and tried to show that it was possible to serve healthy meals on a limited budget—and that kids actually enjoyed eating them. His mission was to radically change the eating habits of children in that school, and across the country. 150 200 15 20 25 CULTIES 250 His project (the "Feed Me Better" campaign) has had some influence on school dinners in the UK. After watching the documentary Jamie's School Dinners, 271,677 people signed a petition calling for healthier school meals. This led the Prime Minister to agree to spend 280 million pounds (about 37 billion yen) on school dinners, to ban some junk food from school menus, and to create a School Food Trust to provide support and advice for people preparing school meals. Research, by the way, shows that children who stop eating sugary, fatty food and instead eat Oliver's school dinners are better behaved in class, and they get higher test 300 scores, too. 350 Of course, the project has had some problems. At first, many students (and even parents) resisted the removal of the junk food they were so used to. In one famous instance, some parents were passing local takeaway food to their children through the school fence. Also, schools that followed the plan for a while were often found to gradually drift back into bad habits. After all, it is easier and cheaper to just give the kids junk food. However, Oliver's efforts represent a positive start, and with obesity becoming such a huge problem (see Unit 4), 400 it's a very necessary start.

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TOEIC・英語 大学生・専門学校生・社会人

これの和訳して貰えませんか?

5 Reading Passage 10 15 20 Yuna Kim is one of the world's best figure skaters. At the 2010 Winter Olympics in Vancouver, she set three world records. In fact, one of those world records broke a record she set in 2009. program and a At the Olympics, both male and female skaters perform a short seven program. In the short program, skaters have less than three minutes to perform required jumps, spins, or other moves. While doing these seven things, the skaters also have to show judges how well they can put these elements together into a kind of dance performance on the ice. The long program is similar to the short program except that skaters perform for a longer time and have more required moves. long Before the 2010 Winter Olympics began, many people thought Yuna Kim was likely to win a gold medal. Certainly, there were other women skaters who had the skill to win gold at the Olympics. However, Ms. Kim had an advantage. She had already set a number of world records. In 2007, she set the record for the highest score in a short program with 71.95 points in Japan. The same year she also set the world record for the highest score in a long program with 133.7 points in Russia. Then, in 2009 she beat her own record in the short program by scoring 76.12 in the United States. At that competition, she also became the first woman to score over 200 points with her short and long programs - her combined score was 207.71. The next year at the Winter Olympics in Vancouver, she broke her records again. In the short program, Ms. Kim scored 78.5, a new world record. In the long program, she scored 150.06, another world record. This gave her a combined total of 228.56 points, a third world record! Needless to say, her score was enough to win gold.

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