（5）のQからみるとPの運動はどのように見えるかという問題がわからないです。相対加速度が0になるから等速直線運動になるというのは原理？的にそうなると思うのですがいまいち飲み込めません..

y 図のように水平方向にx軸, 鉛 a Q 直方向にy軸をとる。時刻 t30 に,原点0から小球Pを速さ voで x軸から 0の角度で投げ出す。こ れと同時に点(a, b) から小球Q 6 Vo を自由落下させる。運動はx, y 0 面内で起こるとし,重力加速度を PO gとする。 (1)投げ出されたPが,Qの置かれた点を通る鉛直線(x=a) を横切 る時刻tを求めよ。 (2) この時刻の P, Qのy座標 yp, Yeをそれぞれ求めよ。 (3) Pを投げ出す角度0がある値のとき, Voの値にかかわらず両物体 は衝突する。そのときの tan0 を求め,a, bで表せ。 (4) x軸の上側(y 0)で衝突が起こるために必要な vo に対する条 件を a, 6, gで表せ。 (5 Qから見るとPの運動はどのように見えるか。 そして, Pが投げ 出されてから衝突するまでの時間 to をV0, a, bで表せ。

私の解答で、（2）のどこが間違っているでしょうか。 3枚目が解答解説で、2枚目が私の解答です

π Tπ Tπ (1) |xf(sin x)dx = | f(sin x)dx を示せ。 ニ 2 x sin? x dx sin? x +8 Tπ

英語 これの答えなんだと思いますか？解いてみたのですが答えがなくて自信がありません。15番の選択肢は①ago ②from now ③past ④in です。 答えだけでかまいませんお願いします🙇‍♀️

A frosty Novemper morning decorates the leafless trees to perfection. When I went up the hill, the white frost was sparkling, and the of milky mist hanging in the air. 6 trees arose on all sides. There were layers The frost has not yet taken to lingering* on the trees in the morning. The air was soon mild. When I went to plant a new tree just received from the nursery*, a gentle moistnes prevailed. Planting trees is pleasant work, encouraging I dug the hole, the soil moved easily beneath the spade, soft and damp. thought about the future, and especially 7 so when conditions are as favorable as this. The weak roots settle 9 into the loam and compost and bone-meal*, pressed into the pit that has been dug; and the infant" thing, little more than a twig, is magnified in the 10 into a handsome and graceful maturity. The village has responded readily 11 the urgings* to plant more trees. In various corners single saplings* are being installed; where more space is available, groups are being planted. A decision as to 12 is not arrived at without much discussion, opinion being split, in general terms, between decorative exoties which put on a great show of blossom and those less showy trees, unfortunately slower in growth, which are more 13 to the village scene. To my relief the latter choice has been preferred. My immediate contribution has been to plant on the grassy edge of the lane which passes my house. 14 there is no room_for anything tall, I chose a white hawthorn*, and as I set it in the earth I could picture it giving pleasure to people who will walk along this lane many years 15 long after I am dead. [注] linger「とどまる」、nursery「苗床」 loam and compost and bone-meal 「黒土(ローム)と堆肥と骨粉」 infant「未発達の」、urging「奨励」、sapling「苗木」、 hawthorn 「セイョウサンザシ」 問6 0 green 2 rich 3 bare fallen 6 問7 0 Below As ③ Though Above 7 間8 0 for 2) dark ③ pessimistic の optimistic 8 問9 0 up hard unresistingly with difficulties 9 問10 0 imagination 2 real ③ future の life 10 問11 0 for ③ to by 11 on 問12 0 the way of planting の what to plant ③ how to plant 0 plant or not 12 問13 の traditional 2 colorful ③ dangerous 0 against 13 問140 If As long as 3 Unless Since 14

赤の部分が間違っており、上はpのy座標、下はpのx座標になるのですがなぜですか？半径1の単位円を書いた時、半径1の単位円の座標Pにおける三角形を見るとsin（π/2＋θ）＝赤（pのx座標）/1＝−b よって赤（pのx座標）＝−b これよりsin（π/2＋θ）＝−b＝−sin... 続きを読む

tan (π-0)- どnla-o) COAT-0) どn(n-0) =- tano P-6,a) Q (ab) バル倍t0)-の入金標 バル8. TB 10)=PのY座情

ケニアの森林が減った理由について、 30字いないで答えなさいの問題で私は ケニアに住む人が増え土地を覆っていた木を伐採したため。 とかにました。ピンになりますか??

|2 次の英文は, ワンガリ ·マータイ (Wangari Maathai) さんと, グリーンベルト運動 (the Green Belt number of people who lived there.. It wasincreasing every year. More people were cutting down the trees which covered_the land, They used them for *firewood when they cooked food So the forests in Kerya cannot get the firewood they need either. Forests also give food to many kinds of animals. They save the bare. The bare land cannot hold water, and cannot produce enough vegetables for the people. The people (anc Forests can hold a lot of water. If the trees in forests are cut down, the land becomes Maathai wanted to protect the forests in Kenya. She had an idea to make a group of people to plant trees. 第3回 cOvered こあかり Movement)について書かれています。各問いに答えなさい。 When she went back to Kenya, she got a shock. One of the *causes was the studied *biology in the U.S. when she was a young woman. In those days, the forests in Kenya were becoming smaller year after yeau 5 became much smaller while she was abroad. lives of people and animals. Soforests are very important. 10 She founded the Green Belt Movement in Kenya in 1977, She began to plant trees in order to prouet forests. There were many women working on the farms in villages in Kenya. They were very pooL, anat children were always hungry. They couldn't take good care of their children. Some of the children cou go to school. So Maathai wanted these women to join the Green Belt Movement. She began to work 15 the women. She *paid some money for their work. The money given to them wasa big help to make lives better. And that helped to make their children happier than before. At the same time, Maathai the women many things, such as how to read and write. They also learned that they could do somethin

∮sin^mdx（mは0以上の整数）＝1/m×sin^m＋1×1/cosxとなりますか？

（2）は無視でお願いします！ （3）がわかりません！3枚目の写真が（3）の答えなのですが、僕の答え（2）と合いません..多分途中の部分分数分解から、積分して対数とって、対数の性質使うあたりがおかしくなっているのですが何が間違っているのかわからないです..指摘おねがいいたします..

-Jo In cosn x dx とおくとき (1) IをIn-2で表せ。 (2) 1o,h2,1314を求めよ。 (3) 次の定積分を求めよ。 dx cos3 x

どこが間違っていますか？ 答えはlog3/2です。

Tπ 2 sin 2x dx 2+ sin? x 0

この問題ってt＝x＋√x^2−3/2と置換する方法しかないですか？ x＝√3/2tanθとしたらできなかったのですが..

[20] 4 dx V2x2 - 3

英語の文法の質問です。 more needs to be done to help educate Inuit towns about the benefits of greenhouse. 文章でなければbenefits の意味は利点なのですが、文章の場合はbenefit... 続きを読む