運動量の問題です。 5ｇのボールが北に5m/sで進んでいて、2つ目のボールとぶつかります。2つ目のボールも5gで、最初は動いていません。2つ目のボールのぶつかったあとの速度は4m/sです。(向きは分からない) 画像にあるようにふたつのボールの位置は少しズレています。(弾性... 続きを読む

0.00573 A 5-gram marble moving at 5 m/s [N] collides with a second marble in an off-center collision. 0005 Suppose the second marble has a mass of 5 grams and is initially at rest. The collision is elastic and the final speed of the second marble is 4.0 m/s. 4) What is the final velocity of the first marble? W t N Pi= Pf KEKEf Va5m/s 5 → (0.005) (5) VF-3 2 f 70025 2 m² + mavi = mivi+m. v 1/2 ½ + (0.005) (5)² = = (0.005) V₁ + ½ (0.005) (4) 0.0625= 0.002525 + 0.04 0.0225-0-0025 Vif² V25 = 9 Vzg = 3 m/s 3 8.025 4 ? Va=0 V8 = 4m/s P = (m,vif) + M₂ Vz f

添削お願いします🙇‍♀️

年度 英語 15 [II] Write (VI) opinions. Write your answer in about 100 English words, not counting punctuation marks. Mr. John Spence's opinion on e-bikes My electric bike is one year old on Thursday, and it was a 75th birthday present. I have only ever been a casual cyclist, but had given my old bike away, as my creaky knees combined with living at the top of a hill-meant that I rarely used it. But with my e-bike I feel so empowered. It is so easy to get around to do a few errands that it often seems quicker than using a car and having to find parking. If anyone is tempted by the idea, I strongly recommend giving it a try. Ms. Liz Ormond's opinion on e-bikes Mr. Spence's enthusiastic praise for e-bikes omits any reference to pedestrians. There is no mention that they are more dangerous than other bikes. Can he tell us what 19 OC DE BESLOT ACAI BESI TE OF 0.8. safety studies have been done in relation to pedestrians, particularly in shared space, and what discussions have been held with organisations such as the Royal National Institute of Blind People? Also, since the motors are effective enough to propel bikes loaded with shopping and children, what effect would the additional weight have in a collision with a pedestrian? (Adapted from "Wheels of fortune: the pros and cons of e-bikes," The Guardian, May 19,2020)

九州大学英語2019年の英作文の添削をお願いします🙇‍♀️ 大問4が要約と英作文、5が和文英訳です！🙇‍♀️🙇‍♀️🙇‍♀️

〔4〕 九州大-理系前期 Read the following newspaper article and follow the instructions below. (36) 16 2019年度 英語 in Engligi taul" According to the Kanagawa Prefectural Police Station, a 20-year-old female university student caused a traffic death. The student was riding on a power- She moved off from an assisted bicycle when the accident happened. intersection and started riding on the sidewalk. At that moment, a 77-year-old lady was walking on the sidewalk and moved toward the bicyclist. The student hit the lady. The collision caused the lady to fall and strike her head. She was transported to hospital, but died of her injuries two days later. At the time of the incident, the student was apparently holding a smartphone in her left hand and a drink in her right while steering the power- assisted bike. Moreover, she had an earphone in her left ear. Therefore, police arrested the student for breaking the new law and riding recklessly. Police are investigating whether the student noticed that the old lady was walking toward her. They suspect that she was not paying sufficient attention because she was operating her smartphone right up until the collision. Her court appearance date has not been decided yet. The Mainichi, December 16, 2017 Instructions: Write two well-developed paragraphs in English. In the first paragraph, summarize the main points of the newspaper article above in lo approximately 100 words. Use different vocabulary and sentence structure from the original passage as much as possible. In the second paragraph, write your opinion about what should be done to reduce accidents like this in approximately 50 words. hosidinlong unich lor, condadnoah

英語の質問です！🥺🥺 波線引いてあるところです！ They could play back at will ってどこにかかってますか？ the accidentについたらおかしいかなって思ってるんですけど 答えの訳では[意のままに再生することのできる、事故について〜]と書... 続きを読む

L By average. Participants were then 20 after the collision. (5) the fact that there was no broken glass, three times as many participants in the "smashed" group as in the "contacted" group reported seeing the nonexistent broken glass. (6) Clearly, the participants in this study had not stored a video-like memory of the accident that they could play back at will.) They had stored a rough impression of 25 the accident and, when asked to recall specifics, filled in details based on information available to them in the present. For example, participants in the "smashed" group reconstructed their memory so that it was consistent with a more violent collision, with the cars going faster and the broken glass that often results from such a collision. -1

この教科書のレベルはどのくらいですか教えください この教科書でどのくらいのレベルの大学まで対応できますか？

1 On 10 February 2009, at a height of about 800 kilometers above Siberia, an American satellite collided the first such height [háit] satellite [séetalait] collide(d) [kaláid(id)] with an old Russian satellite. It was collision [kaligan] collision in the history of space development. As a result, fragment(s) [fráegmant(s)) debris [dabri:] more than 1,000 fragments of debris were scattered into space. 2 The image above shows the vast amount of space debris in orbit around Earth. Approximately 22,000 vast [váest] orbit [5:rbat] approximately [aprá:ksamatli) objects larger than 10 centimeters across are floating around Earth. Of these, about 16,000 are from known 10 considering [kansidarig) artificial [a:rtafijal] currently [ks:rantli] operation [a:paréifon] Considering that there are only about 1,000 artificial satellites currently in operation, the amount of Sources. space debris is astonishing. This space debris is not only due to the collision of satellites. For example, when rockets reach space, they s 15 leave behind surplus engines and fuel tanks. These objects remain in orbit as space debris. In addition, surplus s5:rplas] there are tools that astronauts have dropped while tool(s) [t:l(z)) astronaut(s) [astrand:t(s) aluminum [ala:manom per|par] working outside. Even a one-centimeter aluminum ball. when orbiting at a speed of around 10 kilometers per 0 bullet [bálat] second, is far more powerful than a bullet from a gun. gun [gán]

2枚目の青で丸を書いてある場所(-の部分)についてです。はねかえり係数がマイナスになることって有り得るのですか？？

こに 参考目 3反発係数 質量 m テニスポールを床に落とすとはずむが(図44), ゴム ポールを落とすともっとよくはずみ, 床から勢いよく はねかえってくる。しかし, 粘土では床にくっついて しまってはねかえらない。 このような, はねかえりの A 床との衝突 の所から た後に小 h'[m]を 反発係 O図 44 テニス ポールと床との衝 鉛直 直前の一 とする 程度を表す量を考える。 突 図 45のように,鉛直下向きを正の向き として,小球が床末に衝突する直前の速度を o[m/s](»> 0), 衝突した直後の速度を [m/s)(が"< 0)とする。 ここで, 衝突直前 の速さ(速度の大きさ)は || =D v, 衝突直後 の速さは |'| =ーがと表されるので, 衝 突前後の速さの比奈、eとすると lo| lol ギーの エネ) 衝突直前 衝突直後 速度 v(<O) 正の 向き 速度 v(>0) V=(-e)ue= じ 1を超んないように! (53) O図 45 小球と床との衝突 ひ が成りたつ。eを反発係数(はねかえり係数)という。」1が」より coefficient of restitution も大きくなることはないから,veは息Se%1の値をとる。 アエネルキー保存される。 e=1の衝突を弾性衝突(完全弾性衝突ということもある)といい,この elastic collision 実 とき が| = |»| になるので, 最もよくはねかえる。 ギ-E 0Se<1の衝突を非弾性衝突という。e=0の場合を特に 完全規 inelastic collision 弾性衝突といい,このとき |が| = 0になるので, はねかえらない。 perfectly inelastic collision いろいろなボールと机の面との間の反発係数を測定してみよう。 ○実験6 問1 水平面上を進む小球が, 壁と垂直に衝突してはねかえった。衝突直前の小塚 の速さが2.0m/s, 衝突直後の小球の速さが1.5m/sであるとき,小球と壁 との間の反発係数はいくらか。 5 問16 水平な机の面より 80cm の高さの所から, 小球を自由落下させた。机の面と 小球との間の反発係数を 0.50 とするとき,小球は衝突後何 cmの高さまで はね上がるか。 Op.49 参考 0 48 第1編 力と運動 A