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English Senior High

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(1) Itwas ahot summer day in New York。 The Johns family decided to go to the Bu Zoo. Janet and Kevin Johns had two children: Thomas. 3 years old, and Sally, 6 month Thomas tiked watching all the animals, but he especially loved the gorillas. The Johns went straight to the gorilla exhibit。 There were six adult gorillas and a three month-old baby gorila. In the Brooklyn Zoo, the animals are not mm cages. They arei 1arge areas dug out of the ground. These areas have fences around them so the animal cannot get out. () Watching the gorillas, Sally started to cry. Kevin took her from Janet。 and Janet lookex in her bag for a bottle ofjuice. In those few seconds, Thomas got ost. (WV) Amwoman saw Thomas chimbing up the fence and shouted, “Stop him!' 4 tallman eached up to get him, but it was too late。 Thomas fll down the other side of the 人once. 革e fel 18 fset onto the hard concrete foor._ア_(①with ②bleeding ③he @sel ⑨lay ⑥his head). Janet and Kevin shouted for help.。 語の2 (V) Before the zoo workers arrived, a gorilla went over to Thomas. It was Momo, an eght- Year-old mother gorilla。 She had her baby gorila on her back。 Wth one armrshe picked p the ittle boy。 Then she walked over to a door carrying the bo very careftly Them che put Thomas dowrn so a zo worker could get him. (VO 。 Thomas as badly hurt and bad to go to the hospital but ater a few daya he was beter () 問1 本文に関する以下の文の空楓に入るものとして最も適切なものを選び、 記号で答えなさい。 1 nllas were. 3 1) According to the paragraph (HI),the gori の pon the fenee cindugareas ぶ out ofthe exhibit a_in cages (②) According to the paragraph (皿), Thomas got ]ost @ @ @6 5@ @ 。 as Keyin and Janet started to cry @ ② while Kevin and Janet Wa8 taking care of Sally < when a bottle ofjuice Wa8 spilt by Kevin and Janet @) According to the paragraph (V), a female gorila の held "Phomae apd brought him to a door ゃcarried Thomas to a door with both other arme took Thomas in order to cimb up to door

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Physics Undergraduate

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【1 】As shown in Figure 1, here ame an object Aof mass AZ B ofmass 7 and Cof mass r On a smooth and horizontal surfce. A and B mre inlerconnected by a spring. The Spring has the naumi lcngth of / and a spring constant た A。 B, and C are on one straight Hime and can move along the stmight line. Tuke the right direction as positive fbr velocity Neglect the mass of the spring and air resistanee 国1に示すように, 水平でなめらかな台の上に質量 /の2つの物体 A, Bと質 基wの物体Cが静止している、A と Bはばね定数たで自然散7 のばねで結ばれ てでいるAB,Cは一直線上にあり, この直線上のを動くものとする. 速度の 向きは図の右向きを正にとるものとする. ばねの質基と空気抵抗は無視できる. (①) A and B are oscillated symmetically so ss for center of mass of A and B imtereonnccted by a spdng to be fixed. Find 7, the Gimc pcriod of the oscillgtion. ばねで千ばれた A と B の重心動かないように, A とB の重心に関して左右対 -称に振動させた場合の周期了を求めよ. Next A and B are atrest. The length of the spring is the natural length / で moving speed yo collides perfect-elastically with A. It is assumed that A and C are rigid, the coHlision occurs very shortly and the displacement during the colision is neglected Moreover iis also assumed tbat after the collision。 A snd C do not have nother の 次に, A と B をばねの長さが自然長 7 になる位置で静止させて, C を左から y の速度で A に衝突させる. この衝突は完全弾性衝突であり, かつ物体が非常に かたくて衝突は極めて短時間に行われ, 衝突中の変位の大きさは無視できるも のとする. さらに, Aと Cは一度笑突した後再びぶつからないものとする- の Find tie velociies yand ycofAand Cimmediaedy Ner he colison。 respectiweiy 衝突直後の A と C の速度w vcを求めよ. ⑬) Find the velocity yoof the cemlerofmassofAand B using が6 and ye 衝後の A と B の重心の束度woを44を用いて表せ (④ Find mc minimum lengtb ofthe pcng sferthe colision ing ヶ。 4 we かた 衝突後, Aと B が最も近接したときのばねの長さを ヵ, 7 w。 4を用いて表せ。 も Hi

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