想問一下第四小題🙏🏻 請問是怎麼知道角度是60度的呢？ （看完詳解還是不太懂😅

範例 彈簧系統的簡諧運動 HEMA ANA 在光滑水平面上,一力常數k為4.0N/m 的彈簧一端固定,另一端繫一質量 m 為160 DE 的物體,在兩端點間左右往返,作振幅 R 為 20 cm 的簡諧運動。試求: (1) 角頻率為多少? (2) 偏離平衡點為 10 cm 之瞬間的加速度量值為何? (3) 最大加速度量值為何? (4)由右端點運動至平衡點右方10 cm處,所需之最短時間為何? 等速率圓周運動相對圓心繞過的角度為60 答 ()) (2) w=%=5 4 m 10.16 a = -√³²³x = ( ²1² ) ² x =(04)20.1=2.57 (c) (3)當X=R時a最大 amax =W³²R = 5³²³×0.2=5 (4) 60° 360° T = 7x0.41 T=₂₁² √2 二元=0.4元 t= 15

不是很理解自己哪裡出錯了 有大神可以救救我嗎

M Vmax. a=0 背題(每題 5 分,共 50 分) 2 1質量皆為M相距 20之二固定質點,其連線之中垂線上與中點相距x處有一質量m 的質點,此質點原本靜止,受二 M之引而開始作週期性運動,若x<<a,則此運動 為SHM。質點m運動抵達點時速率為何? T=1221M (4)* m 01x 2a - GM 2a - X (B). > => GM³²² = k₁x M F=k₁x NEOK.ZGM ZGM ² V STR 31 = zna 63x93x 7 = 21/₁1/2²²² =212GM X0&M (D)28 GM GM .2x EM (C) a V a a a a (E) 人生 4x GM a 感 NZGM (1 a Q ax 2GM 1=√294 ax 動 党甘

請問第24題為什麼用when🥺🥺🙏🙏

Ľ 23 control by using cruel discipline. They may think that 24 in fact they aren't. Other people will try to keep their pet punishment and intimidation are the best ways to solve a problem d people abuse animals because they are careless. For example, someoné might forget to give their cat water for a few days or leave their dog in a car on a hot day with the windows rolled up. Some people 25 they can handle. By doing so, the hurt animals instead of helping them by taking in more pets animals end up living in a place that's cramped, dirty and unhealthy. Nearly all of these people can learn to understand (F) Keep 26% they are being cruel to animals through basic and proper education and become a better keeper. OK The next biggest group of animal abusers does it on purpose, but only for a short period of time. For example, a group of kids may throw rocks at a nest of baby birds they happen to see, or hurt a 22 Beat 28 everyone else is doing. in their neighborhood. These people are usually young, and they aren't thinking. Mostly, they do so out of the peer pressure or the need to impress each other. They just go along with This last group of abusers is the worst. These are people who intentionally hurt animals because it makes them feel powerful. By doing so, they think they control the animals. Others enjoy pain and violence. All of the people in the last group suffer from serious, psychological problems y not go away on their own. They often need the help of licensed professionals-like a psychologist. Without help, their psychological problems can that will probably HC 30 them for their whole lives. to that stray (G) what simply 第4頁 共10頁 (H) haunt when (I) with 29 (E) under (J) than 實際与前述不同

求詳解

14.彈簧振子 A 的質量為 2 kg,理想彈簧的彈性常數為 30 N/m,在振子 上面放置一個質量為 1 kg 的木塊 B,如圖所示,使木塊與振子一起在 光滑水平面上作 SHM,振子與木塊間的最大靜摩擦力為4.9 N,為了 使振子與木塊間不發生滑動,則振幅的最大值約為多少cm? (A) 49 (B)32.7 (C)24.5 (D)16.3 (E) 9.8 --:70 12.7 O eeeeeeee *

這篇看的有點矇 想請問是真的那些單字有一字多義的這些意思 還是這題出題有錯誤

in an ng S ge 1. er DAR 三、文意選填(占10分)(請忽略大小寫) 品牌 019W 第21 至 30 題為題組 The 29. doum Den (A turns out (B) come across (F) accomplishment (G) in addition elod Societies and cultures are continually adapting, and long-practiced customs are disappearing. One 21, that is slowly fading out of practice is the Swedish custom of Fika. 22. the habit of grabbing 年銷 a latte at Starbucks on the way to work, Fika is a true coffee break. On a Fika break, a person spends 1–2 hours forgetting about work and enjoying their companion, whether it be a friend or a novel. Unfortunately, this 23. custom is in danger, and not just in Sweden. The fast-paced, high (n)擁有物 財產 pressure world we live in today has made time a precious possession. Our ambition to be successful 無義急 often makes it seem like there are no worthwhile reasons to spend that time on anything as pointless as a survive ( their success at work 14 cup of coffee. We devote all our energy to our career, and many people 24. with success in life, We 25. spending more time with our clients than we do with our friends. We 26. have time for family. tovi Fika, on the other hand, is about separating our li so. And M what work, we are 21. 26. IC AH » on the other hand, is about separating our lives from our work, even if it's just for an hour or 22. 27. HB (C) that 27. Fika, there are no rules. It can be done at home, in a park, or on a train. It can be done 2900F HONE with coffee or tea, with or without a sweet dessert. Its only_28. is that one removes oneself from the HIBE daily grind for a brief escape below average (#4) piqor ST (C) disgusting A. (D) varied (H) amazing A (I) rewarded Hi boug ++# / 847) De moments. We can connect with people we care for and who care for us in return. And when we return to 30. be more productive and focused. Perhaps it's time for you to schedule a Fika break. CI BE 25. JA GE 23. R 30. E.G. into varied (47 (n) Huomib of a Fika break are numerous. We can step away from job pressure for a few brief con 28. brush to 73 mish gri (D) take part in (D) where V. (1) below average FJ T 78 A(E) survive 24. 29. SON itsn seitseng ait ol tosido vlamorta enorgiler

這題不知道怎麼算 求解🙏

20 5.( )有一質量為m之物體作振幅為R 的 SHM,距離平衡點- 中 處的速率為v,關於此質點下列敘述哪些錯誤? 2 4v² (B)加速度最大值為 √√3 3R 植 (A)最大速率為 6=RW 期為 W=1 √3TR V 衡點之淨力為 (D)經過平衡點的加速度為零(E)在平 RW² = 8 VZRT RW-4 4mv 3R 。 (每題10分,共50分) W => 兀 2小

這題！🙏🏻🙏🏻

2.右圖中,紅色虛線為一跳水選手從起跳到落水的運動軌跡,則該高 選手的重力位能的變化應為下列何者? (A) 一直變小 (B) 一直變大 (C) 先變大再變小 (D) 先變小再變大 SHMASI (ED) 音 動凸起更地勢团 飾當非,更數的

可以幫我想嗎？（大約100個單字）謝謝🙏（今天以前要）

寫作能力測驗的主題是A Lucky Day,故事開頭如下。開頭部分不必重謄,答 案請寫在「寫作能力測驗答案紙」上。評分重點包括內容、組織、文法、用字 裝一套 遣詞、標點符號、大小寫。 TOH-COINT DE Yesterday, John got up early, had his breakfast, and drove to work as usual. After arriving at the office, he started his daily work routine. He looked through his schedule quickly, made a few phone calls to his customers, and checked his e-mail. Then, he gathered his files and prepared to have a meeting with his boss and team members.....

想請問第三小題，要怎麼判斷什麼時候該用力學能守恆，什麼時候該用動量守恆？

一維彈性碰撞 YmV to 範例 4-3 sm 在光滑水平面上,質量為 m 的 A車以速度,與前方質量同為 m 的靜止 B 車作正面彈性碰撞,如圖所示,B車的左方繫著一條 彈性常數為k、質量計的水平彈簧,則: (1)碰撞 B 車的速度量值為多少?V (2) 當兩車距離最接近時,質心速度量值為多少? (3) 彈簧最大的壓縮量為多少? |分析 1. 質量相等的兩物體作正面彈性碰撞後,速度交換。 2. 碰撞過程中任何時刻的質心速度必等於碰撞前的質心速度。 3. 兩車最接近時,兩車的速度皆為質心速度,此時彈簧有最大壓縮量。 (211) |解答 2m m+m (1)vp'= (2) 由質心速度不變 ⇒ve(最接近)=v(碰撞前) mv + m×0 v = m+m (3) 當兩車最接近時:兩車速度相等皆等於質心速度、彈簧壓縮量R最大 由力學能守恆:(K+ U)碰撞前 m-m m+m × (v) + ⇒ (-/-mv² X0=y。 (K + Us) 最接近 (+(+) -kR²⇒R=v = —_~mv² + 0 ) + 0 = = = m ( ²² ) ² m V 2k 。 A v m W

請問B部分的1到4題怎麼寫？

折机強夕标准 1 ol BUG m Lesson 4 (B) 依照提示改寫以下句子, 1. It was difficult for Bill to rise to his feet after he fell down the stairs. (problems) 2. It is hard for me to speed up the research and get a satisfactory result. (difficulty) 3. Johnny finds it hard to do his English homework without help. (trouble) → 4. Grace found it difficult to come to terms with the death of her cat. (a hard time) → 2656e90e2 四、翻譯:20%(1至3每格1分,4至5每題3分,6至7每題4分) 臺上那位婦人公開表示所有人應有在法庭上接受公正審判的權利 。 The woman on the stage__ al in court. 幾千人現身示威,呼籲廢除死刑。 usands of people showed up at the demonstration to bolishment of the death penalty. for the right of all people to a fair 這個地區更好,政府決定下週日炸毀老舊的建築物並重建新的 。 e this region better, the government decided to lings next Sunday and rebuild new ones. 1. Rebecca,被她的校長認為是個有天分的學生,使我非常自豪。(N(,)+ the