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English Junior High

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HKk yesterday jhing TV in thermom ll for me. さい。 was7eW 1 14 cannotr 8 alki」 “Wh d in the world?! But she couldmt answer Tsaid 1 imaybe many children cant study at school》 Then we decided (6 find an an an answer We used the Internet and found a picture of a school, s was surprised because about 99% of peoplein Japan ea many people who cant to the que The schoolhas 16 ma 6 Glassroom, and only a few students have textbooks。 When we talked about th my 人 in a @ 8chool with our j0 teacher Mx Takagi he said, “Why domt you listen to someone who has been to that country?" was a good idea. We visited *Oity Hall。A woman there told us about a doctor, Mr Nishi 了 that country for Six months and sometimes Visited schools as a volunteer doctor。 6 A week later, we visited Mx Nishi。 He said, There aremt enough schools。Some children wantto ]earn at school, but they have to take care of their httle brothers and sisters、Other chidren have jj 10 work to gef food and water for their famihies。 When IT tistened to him、 the childrens Nes *jimpressed me。T *said to myself HCS not easy to answer our question、Tcant do anything great putTcan do something for an *NGO working to build a new school2 from now T will have a ot of questions。 Maybe I can find an answer to them or maybe Lcant、 put iC important to ook fOr an an8Wer, And is interesting to learn about something new Lwl 9 everstop learning all my life。Some day 1 want to visit the schoolm thts picture and 1 wuこよ (注〕) presentation 発表 7丸eWor/d Werea Vi//age of700 Peop!e 【lE旧がもしIOOAのだったら1 Asia アジ7 maybe たぷん CityHall 市役所 。 impress に胃い国旬を号える say 10 0neself 心の中で考える NGO 非政府組織 な ョjn >生み昌林明で澄きかさい。 ms のEE たWGET

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Physics Undergraduate

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【2 】 Abell A wi mas ma ls suspended al te cdge ofs wi wih length / C) woee dee is tved wt O as illustmied in Fignre 2 ー The tall emwins stil at the height As mnd then | doppet Another hall B with mass ye at NN 多 the botom on the arc of the motion of the ball alB y] A_ The tall Acollides against the ball B in the cad tansential pmojection at the bottom. Here the gravittional acceleration is denoted by g. の Nesicct thc mass of the wire and airresistance Answer the following questione。 団 2 に示すように, 質基maの球A が, 片端を点 O に固定した長きんのワイヤ ーで吊り下げられてでいる. 高さ aに静止している慰A を静かに離す 球んが之 動する円弧上の最下点に質量 mの球 B が静止しでいる- 球人は球 B に周方向 から衝突する重力加速度を g とし, ワイヤーの質量と空抵抗が無視できる として, 次の間いに答えよ. (1!) The ball A with the velocity ya periectinelastically collided with the ball B. Find he velocity of the merged balls immediately aer collision using ae We 球A は速度で味B と完人大作衝突した at へ をseaを用いて求めよ。 の 本06 GURedoeeai Be compared with that before the balls periecinelastically collided using am fe g。 問①において, 球Aが球 B と完全非弾性衛内する前と後における運動エネ ルギーの差を ax./。 # を用いて求めよ。 (3) Find the velocity of the ball A immediately after collision against the ball B when me collsion is occured with the cocfiicient ofrestittion 0.5 ueing ma / 球Aが球B と反発係数0.3 で衝突した時, い 2AVDXPS: -

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