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物理 大学生・専門学校生・社会人

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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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英語 高校生

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) 次の英文を読み、下記の設問に対する答えとして最も適切なものを選択朋やー④の中から 1 つず 回 つ選びなさい。 Boxing fstsprobabjy began Boxing, a sportin which two people ight by hitting each other with th Howevef ittook along time to develop a8 the frst ime one person punched another in Dlay, not anger the use of padded gloves and allow boxers onlyto hi the activity we know today with rules that require aist and on the front or side。andLdo not allow holding an Opponent ) and ttaly, amd their opponents above their wi twas a popular sport in ancient Greece, Asia Minor (mostly modern day Turkey yas an Olympic event from about 688 BC。 Boxing gloves were apparentjy invented'around 1500, first recorded_boxing although fighting was still mainjy with bare fists for many years after that。 The din 1681zn Britain。 An English nobleman organized the fight between WO ofhis match' was hel Servants) The frst Enghish championzfn 1719.as James Figg and it was 3t this time that the word Boxers stil fought with bare fts and the earliest formal boxing'was first used to describe the sport (They recommended using rules were introduced by another champion、James Broughtoh in 1743 ining butn6Eim actual boxing matches。 jandages or padded mittens to protect the hands in tm Amajor change came when the Queensbury rules were published in LondoNAin 1862。 These rules made wearing gloves necessary, fixed the size of the ringranddecided that each, round should be They became the standard set ofrules three minutes long, wi breaks of one minute between rounds under which all boxing matches were foughtand they became common in the USAandCanad: ground 889. The first world heavyweight championship under the Queensbury rules took place in New Orleans in 1892. Bare fist fighting continued until the late nineteenth centuryalhogh 1aws were passed in Britain and the USA to stop 直 was considered to be a crime 6f violence) even ii he Righters both agreed to the match。 Even today, these fights still take place, and_most of the boxers are 'street jighfers' from poor areas of the world。 They are attracted by the prize moneyiand promoters of these iegal malches can st become very rich、in spite of breaking the law so long as they escape being caught.

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