物理です。この問題なんですが、解説は速さで考えているから、e=v'sinθ2/vsinθ1となってますが、速度で考えると、vsinθ1とv'sinθ2で、向きが反対なため、e=-v'sinθ2/vsinθ1としなければならないと思うんですが、そうすると最終的な答えに、マイナ... Read More

例題30)なめらかな面との斜め衝突 109||115 右図のように,なめらかな面に対して, 面と 0. の角をなす向きに衝突したボールが, 衝突後,面 と6。の角をなす向きにはね返った。このボール と面との間の反発係数を求めよ。 解答 衝突前のボー ルの速さを, 衝突 後のボールの速さを がとすると,面はな めらかだから, U Cos0,= v' cos02 …①0 面に垂直な方向で考えると, o' sin 02 U sin 0」 のセンサー 36 び'sin O。 vCOs0, Q o なめらかな面に斜めに衝突 する場合は,面に垂直な速 度成分の大きさの比が反発 係数となる。 『"cosb。 Usin 0,! 注なめらかな面の場合,面に 平行な方向に力がはたらかない ので,面に平行な速度成分は不 e= 変。 tan 02 0, ②より, e= tan0

数学の軌跡の問題ですが、求める軌跡をp(X,Y)とおいたのに、何で最後X→x,Y→yに変えてもいいんですか？

とはずものがたりで出てくる為方の卿ってなんのことですか？訳も為方卿でなんのことだかわかりません

これを日本語に直したらなんですか？

14) 鳴あ 呼あ 哀。 哉 シイ かな

訳と構文が分かんないです 1の③です

(24) 困シせん へに飛かい… him to dress like a doctor or lawyer, but he always dressed like my What my father wore embarrassed me as a young man. I wanted *I をさせる father. He wore old jeans and snapped shirts. I blamed the way he dressed for my social failures. I felt that girls 5 laughed at me because they' d seen him mowing" the grass in cut-offs" and black boots. I asked him what even at age fourteen struck me as cruel and wrong. “Why," I asked, "don' t you dress 'nice," like my friends' fathers?" He held me with his sad, shocked eyes and searched 2. for an answer. Then he said, "I like my clothes." An hour later my mother stormed into my room, slapped* me hard OT across the face and called me an “ungrateful little fool." ①In time they forgave me, and as I matured I realized that girls avoided me not because of my father but because of his son. ②I realized that my mother had slapped me because my father could not, and it soon 15 became clear that what he had really said that night was that there are things more important than clothes. He' d said he couldn' tspend even five cents on himself because there were things I wanted. Without another word, my father said, "You' re my son, and I make sacrifices so that your life will be better than mine." For my high-schoo! graduation, my father arrived in a suit. 0% Somehow he seemed taller, more handsome and impressive. It wasn' t the suit, of course, but theman. I didn' t see it again until his funeral. On the morning of his funeral, I took the suit out of his closet and changed into it. I gathered up the courage to study myself in his 25 mirror, where I appeared small and insignificant. ③AndI stood there for some time, facing myself in my father' s mirror, weeping and trying to imagine- my father' s clothes. (注)mow 草を機械で刈る slap 平手でたたく grow into (H14. 3) cut-offs ひざ上で切ったジーンズ -as I will for the rest of my life the day IlI -47-

嗚呼は、書き下し文にする時平仮名ですか？

嗚呼ｯ これもわからんんんん😣 分かりやすく解説もお願いします……🙏 ((12番のやつです

1枚目→問題 2枚目→書き下し文と現代語訳 なぜ「哉」は「嗚呼〜哉」の「哉」ではなく「安くんぞ〜哉」の「哉」として訳すのですか？ 解説お願いします🙇‍♀️

人 人 SAへ AA JA ロン 9次 臣/洋 坦 N 尿記沈 時 N 措,窒 ※愛題一一KOS絆5 (ース民癌・紀) | ]

07の並び替え問題ですが、 チケット売り場の人にショーのチケットは もう全て売り切れましたと言ったと思ったので 2枚目の上に書いてるように並び替えたのですが 答えが違ったのです なぜ違うのか教えてください

この式を美しくまとめてみてください。数学自信のある方よろしくお願いします。