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物理 大学生・専門学校生・社会人

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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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英語 高校生

2,3の答えが合っているかどうかを教えてください! 間違えてたら何故そうなるのかも頼みます!

Lily : 1guess my opinion is somewhere in between. Of course, We shoul devote ourselves to our studies during the school term. But college students are given a long vacation in summer, and we should make full use of 計、 For example, by doing a summer-vacation 1Ob, We Ca 40 pay for school fees or make money for travehng oVerSea8 to see more of the world. Actually,Tve already found a part-tme job at a radio jifteen hours : Sa Week are 1ess tikan got too tire。 SSMe too tired to concentrate o get good gradea ? "They often 9 ate on theiy s k eir studies : ipping lectures。 Aa 1 udies and momeumem en up concerned, 1 thin1 as the economic side of the probler K We just ne 1 Jast need to tyy i 1 instead of in 1 SMA 時 in our mennW how to make d ツ。 For inetance、 Tve been leami 1ot at UNSIRSDB arning n lot about Y Small bud, W 9 get fh garah Tsee、8o youre PT get from money-saving bloge 30 1) college st Students shc S shou 則II 6 の cols ld not skip any lectures in their major fieldw 3 StUuQ き e 二 ents ought to find a sure means of living ⑬ we should gi 析 NR g1ve top priori 6 rity to ies RA1 1 て@ ) | y to our studies by living a modest ie ご 8 1mit ourselvr i EE S to working ffteen hours a week 95 Sarah: 1L11Y, WOU OU agrYe: i i 5 gree with Brian or Helen ? - station and will use the money to visit Japan in late August. Sarah: Wow,1 didnt knoW you Were the travehing type, Lily. So your idea 4 1 45 is nonsense for college students to enjoy travehng abroad (⑳ saving up money steadily helps us Droaden our knowledge 1 ⑬ summer vacation is a perfect opportumity to gain woyk exDerience ⑭ itisbest to work part-time only during vacation 辿.thereiS 8 Way・ 50 s. "Where there isaW Lily : Yes, 8S the proverb goe your kind advice. TU Sarah : You may be right. Thanks, everyon6 for have to think this over for a bt.

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