物理の力学の問題について質問です。 過去問を解きたいのですが全く答えが分からないため、解いて頂けないでしょうか？

物理学 ⅡⅠ 期末試験 問題用紙も回収します。 選択式の問題は、正しい選択肢を記号で記すこと。 記述式の 問題は､解答だけではなく、 解答に至る考え方も書くこと。 ベクトルはそれとわかる よう書くこと. ① 質量mの質点の位置ベクトルを、運動方程式を Fとする｡ (1) 質点の原点のまわりの回転の運動方程式を導出せよ。 (2) 外力Fが中心力のとき、 角運動量が保存することを示せ。 (3) 質点が (x,y) 平面内を運動する場合、 原点のまわりの角運動量を極座標 (r, Φ) を用いて表せ。 2② 軽い針金でできた一辺lの立方体の枠がある。 1つの頂点に糸をつけ、隣接す 頂点P1, P2, P3 にそれぞれ質量 mi, m2, m3 のおもりをつけて吊り下げたとこ ろ、静止した。 重力加速度ベクトルをg とし、 OP = r. (i=1,2,3) とおく。 7₁ g↓ (1) 系の重心 (質量中心) Gの位置ベクトルrc をri を用いて表せ。 (2) 重力は重心Gに働くとしてよいことを示せ。 (3) 糸の張力の大きさを求めよ。 (4) 重心G と支点は鉛直線上に並ぶことを示せ。 (5) OP が回転軸のときの慣性モーメントI を求めよ。 (6) P1P が回転軸のときの慣性モーメントⅠ'を求め よ。 3 固定軸のまわりで回転する剛体を考える。 剛体の質量をM,重心GとOとの距離をん, 剛体 の軸Oのまわりの慣性モーメントをIとする。 図 のようにx,y,z軸を取り、 剛体の運動を偏角めで 表す。 重力加速度をg とする。 x P3 Ø R 2₂ G Mg P2 P1 (1) 回転の方程式として正しいものを選べ。 do (a) IapzMgh cos o (b) latMghsin o (c) IamMgh cos o (d) apzMgh sino (2) 運動は微小振動であるとする。 周期Tとして正しいものを選べ。 Mgh (a) 2 I I 9 (b) 2 Mgh 2ヶ (c) 21 (d) 2π√√ h 9 (3) 運動は微小振動であるとする。 初期条件として、角度だけ持ち上げて静か に離した。このときの重心の運動として正しいものを選べ。 但し以下では、 は微小振動の角振動数を表す。 (a) r(t) = hoo cos(ft), y(t) = h (c) π(t)=hdo sin (St), y(t)=h (e) x(t)=hdocos (ft), y(t)=hdo sin(St) (b) x(t)=h, y(t)=hdocos (nt) (d) π(t)=h, y(t) hdo sin (St) = (4) 前間の重心運動に対応した回転軸Oに働く抗力 R = Rzex + Ryey として正 しいものを選べ。 (a) R=-Mg, Ry=MhQdocos (t) (b) R=0, Ry=MhΩ2 do sin (nt) (c) R-Mg, Ry=0 (d) R=MhQ2 do cos (St), Ry=MhΩ do sin (Qt) (5) 安定に静止した状態で、 剛体に角速度ω を与えた。 この場合の力学的エネ ルギーEの値として正しいものを選べ。 但し位置エネルギーの基準点は0と する｡ (a) E = 0 (b) E=Mgh (c) E-Mgh (d) E ==Iw (e) E ==Iw+Mgh (f)=1/2Iug-Migh (6) 前問の初期条件の下で、 剛体が1回転するために必要な角速度wo の最小値と して正しいものを選べ。 (a) 0 (b) √20 (c) 2Ω (d) 4Ω (7) 回転軸の位置、 すなわちんの値を変化 させたときの慣性モーメントIの変化を 表すグラフとして正しいものを選べ。 -h A" (b) $+) (d) ・h

英語の問題に苦戦しています。わかる方いましたら手を貸してください。よろしくお願いします。

52. He ( tomorrow. be to come back from his parent's home will to 3 is to 53. There's no need to get so angry. Keep your ( ). mind 56. He has ( many 54. It's time you ( 1 go 3had gone 2 face treat 3 treated is to be 55. I belong to the swimming club, ( also a member. that 3temper 4mood ) to school, isn't it? went 4would go ) she is which 3 of which where ) time to take regular meals. few 3 little Ⓒsmall 57. The employees demanded that company (). them equally. treats 4was treated

合っているかと空欄のところを教えて欲しいです

Question()に入る適切な語を語群から選びましょう。 (1) Your answer is not ( ) wrong. (2) Not ( ) student has a computer. every (3) I didn't make (both ) of them myself. { every / never / necessarily / both / neither}

合っているか教えて欲しいです

Question ( )に入る適切な語を選びましょう。 (5) I wish I (will have / have / had) a driver's license. (6) What would you buy if you ( are to / were to win the lottery? (7) I'm sorry I don't know his address. とほぼ同じ意味の文にしなさい。 I wish I (know/knew / had known ) his address. (8) (With / Without/ For ) his advice, we couldn't have won the game. Try it out 1 (→p.49) ()に入る語を選び, 英文を完成させましょう。 必要であれば,適切な形に変えましょう。 1. If you don't hurry, you will (iss 2. If I ( 西説法士 仮定法にしなさい。 ) your flight. haye ) you, I would (cha) to study abroad soon after graduation. (choose hay of eaten ) at better local restaurants. se) more interest in visiting foreign countries, he could be a better English were 3. If Kate had learned more about the area, she could ( 4. If Kei ( speaker. choose/have/eat / miss / be

英作文の添削をしてほしいです。文法的なところとか、スペルだけでもいいので、お願いします！何を書いているかわからなければ、言ってもらって全然大丈夫です！

4 POINTS TOPIC Agree or disagree: Japanese companies should require employees to use English in their workplace al ●Write an essay on the given TOPIC. Use TWO of the POINTS below to support your answer. Structure: introduction, main body, and conclusion Suggested length: 120-150 words 18 ●Write your essay in the space provided on Side B of your answer sheet. Any writing outside the space will not be graded. ■Communication barriers 言語の壁 LExpansion of market 市場の拡大 ●Labor shortage 人員不足 Stress b ストレス 日本語は難しい と言われている。 total:128 words 英語を使えば、日本語を話せないが、 日本で働きたい外国人の雇用につながる ―海外進出商品のに人知度叩かも、 ・海外のニーズに応じた 商品づくりもできる Galaxy A54.5Gの解しょう もし社員が英語を話せたら。 外国人の雇用につながる ・経済が

英検準1級ライティングの添削をお願いしたいです！何を書いているか全くわからなければ、言ってもらえると… あと、筆記試験90分の間でライティングを書かないといけないんですけど、本当にライティングが苦手で、少しでも短時間で良い文章を書くコツを教えてください！具体的に言えば、英文... 続きを読む

Write an essay on the given TOPIC. OUse TWO of the POINTS below to support your answer. Structure: introduction, main body, and conclusion Suggested length: 120-150 words TOPIC or disagree: More companies will allow employees to work from 情報セキュグ 危ない disag Agree home in the future POINTS ●Information security Communication Recruitment Cost reduction I do 1 仕事の内容の 外部漏れの危険 1 not agree home in the future and I have two reasons to support Day 2 Day 3 ・直接コミュニケーションをとれない一誤解を招くおそれ (記録をしないと) 相手と商談や会議等の連絡をメールや コスト削減。 電話しないといけない手間がかかる。 Day that more companies will allow employees to work from 4 this opinion... on One of the reason is that employees cannot communicate on meet easily. They have to keep in touch with partner about importan things such as meetings the phone or e-mail, so they might take so much time to do this. Also, might make mistakes if they do not communicate on the phones or e-mail without s keep records of communication. Day they Another of the reason is that it companies might need to improve employees houses information security.. If do not do this, documents might be seen by companies many people such as employees' familys, and visitors to them, For these reasons abore, more companies will not allow employees to work from home if these problems are solved. total: 143 words Da 6

英検準1級のライティングです。 どなたでも構いません。添削をお願いしたいです！何を書いているか分からなければ、聞いてもらって全然大丈夫です。ていうか、読んだだけでは、全く理解できないと思います。 近日中に受けるので、明日の夕方頃までにお願いします🙏

Write an essay on the given TOPIC. Use TWO of the POINTS below to support your answer. Structure: introduction, main body, and conclusion Suggested length: 120-150 words TOPIC Do you think that gas-powered cars will be replaced by electric cars in the near future? 電時の排出 POINTS 走行エネルギーの asse). Environment Convenience #1124-Kat #veg Cost Industry 高速産 ・充電せった コストが高い 産業限られた 短いきが しが ・使用者が買いかえようとは 思わない 2:33. 1 充電スペースの 2015 3. cars will be replaced by electric cars I do not think that gas-powered opinion. in the near future, I have two reasons to support this One reason is that it may be not convenient for people to drive electric cars in these days society. For example, electric cars take more time to charge than gas-powered cars. Moreover, electric cars can run few distance. Onother reason is that electric cars cost a lot of money in the many situation. For example, people who use electric, cars usually sex charging places at the each houses, but they have to pay so much cash to do it, Also, they need to prepare too much money every month to charge electric Propte cash, For these reasons above, I believe that gas-powered cars will be replaced by electric cars in the near future. total: 179 words

I don't have the courage ( to ask )my boss to lend me his car. かっこに入る選択肢がいくつかあって 答えは、同格の不定詞to askでした 選択肢の中にあったfor askingは、 なぜ間違いなのですか？ 同格... 続きを読む

合っているか教えて欲しいです

Question ( )に入る適切な語を選びましょう。 at (9) The (part/weight /ratio) of salt to the soup is 1 to 100. (10) (A number / The number) of online shopping has been increasing. (11) The (number/ amount) of housework decreased compared to the past. Try it out 1 (→p.53) 1. We can get a great (number /deal) of news on the internet. 2. There were only a (fewy little) people who wanted to work with robots. 3. Almost ((members / all members) on our team agree to introduce the new machines. 4. Robots can do a lot of (work/works) that humans cannot do.

わからないので答えを教えてもらいたいです。

英語 Amy: Hey Jake, I was thinking about online shopping this weekend. Do you shop online often? Jake: Yeah, I do it quite a bit. It's so ( house and you can ( ) almost anything online. That's true. I love the convenience, too, especially with a busy schedule. But I've heard there are some downsides to it. What do you think? Well, one obvious downside is not being able to ( ) or try the product before buying. Sometimes, what you see on the website isn't exactly what you get. Amy: Yeah, that's a good point. I've had a couple of instances where the color or size was ) from what I expected. ( Another thing is the shipping time. Even with express shipping, you might have to ( ) a few days for your stuff to arrive. It's not great if you need Amy: Jake: Jake: Amy: Amy: Jake: Jake: Jake: something urgently. True, waiting can be frustrating. But what about the ( that sometimes the prices are higher online. It depends. I've found some great deals online, especially during sales. But you're right; in some cases, the prices can be a bit inflated, and you might end up paying more than if you bought it in-store. Amy: And returns can be a hassle, too. I had to return a shirt once, and the process took forever. It's not as easy as just going to a store and returning it on the spot. Yeah, returns can be a pain. Also, there's the whole security issue. You must be careful about where you're buying from to avoid scams or stealing your ( ). Amy: Oh, definitely. I always make sure the website is secure before entering any payment details. 日本語 L ), you know? No need to leave the On the bright side, online ( ) can be super helpful. I always check them before making a purchase. It gives you an idea of the product's quality and whether it's worth the money. Amy: That's a good point. I do the same. It's like having the opinions of a bunch of friends who've already ( ) the product. Jake: Exactly. So, while there are some drawbacks, I think the ( ) of online shopping, like the convenience and variety, outweigh the ( ) for me. Yeah, I agree. It's all about finding a balance and being cautious about where and what you're buying. )? I've heard