Grade

Type of questions

Physics Senior High

①Aが右方向に動いたらなぜ、動摩擦力μNが左方向に動くのですか? ②なぜ、作用反作用の法則を使うのですか?

図4-14のようになめらかな水平 面上に質量Mの台車が静止して いる。台車の上面は水平で, その上に質 量mの小物体が速度ですべり込んで きた。 小物体は台車の上面から動摩擦力 を受けて減速し、 逆に台車は小物体から 動摩擦力を受けて動きはじめた。やがて 時間のあと、小物体と台車は一体とな って,速度Vで等速度運動するようになった。 小物体と台車との間の動摩擦係数をμ, 重力加速度の大きさを して、以下の問に答えよ。 (1) 時間を求めよ。 (2) 速度Vを求めよ。 2 橋元流で 解く! この問題は典型的な入試問題ですね。 正しく問題文を理解する ことがポイントとなってきます。 ここで「物理はイメージ」だということを思い出してくださ い。たんなる図や絵じゃなくて, 「そこでどんなことが起こっているか」 をイメージできることがポイントとなります。 「ああ、こういうことにな ってこんなことが起こったんだ・・・」という具合にね。 問題文で、「やがて時間Tのあと, 小物体と台車は一体となって、速度 Vで等速度運動するようになった」とありますが、なぜ一体となったので しょうか? イメージをする練習を しましょう。 準備 図4-15 (a)のように台車 Bとその上に小物体Aがあります。 台車Bは静止しています。 小物体A が速度ですべり込んできたとしま す。 ここでどんなことが起こるで しょうか? m 静止 小物体と台車が一体となる m M M Vo 図4-15 (a) B

Resolved Answers: 1
English Junior High

別紙に解いてみたんですが、あってるか心配なのでどなたか教えてください💦

)内の語を適する形にかえ,文の意味を日本語で書きなさい。 ただし, 1語とは限りません ①1 次の (1) I have homework (do). (2) Tom wanted (visit) Kyoto and Nara. (3) Let's go to the park (see) birds. 2 次の各組の文がほぼ同じ内容になるように, (1) (2) They went to the park and played soccer. They went to the park に適する語を書きなさい。 I wanted to learn Japanese, so I went to Japan. { wented Japar Japanese. soccer. 3 次の下線部の不定詞と同じ用法の不定詞を含む文を下からすべて選び, 記号で答えなさい。 (1) I know good ways to study English. (2) I want to read this book. (3) I stayed home to read this book. ア My sister likes to play the piano. イ Japan has many cities to visit. ウ Do you have time to talk with me ? I I go to bed early to get up at five. オ They don't like to run. カ I came home early to help my mother. (2) 私は読むための本を数冊持っています。 4 次の日本語に合うように,( 内の語を並べかえなさい。 (1) たくさんの人々がスポーツを楽しむためにこの公園に来ます。 (park / many / enjoy/come / this / to / to / people) sports. (read/ some/to/ /books/have /.) (3) 私にとってスペイン語を話すことは簡単です。 ( is / for / to / Spanish / it / me / easy / speak / . ) (4) 京都には訪れるべき場所がたくさんあります。 (has / lot/places / to / Kyoto / of / visit / /a / ) [ [ 20 次の対書 Kenji: Jane sports. Kenji Jane Kenji: Jane Kenji: Jane Kenji Jane (1) 下 (2) ( (3) 下 答アイウ (4) 2 アイウエ (1) (2) (3) 3 (5)

Resolved Answers: 1
English Junior High

なぜ、答えが 『エ』ではなく 『ウ』になるのか 教えてほしいです🙇‍♀️

次の英文を読んで、問1~問5に答えなさい。 *印のついている語句には,本文のあとに〔注〕があります。(10分) A 1901, the Nobel Prize has *honored men and women from all over the world for great work in science, writing, and peace. The Nobel Prize is an *award that was started in Sweden. The name Nobel Prize comes from a Swedish scientist, Alfred Nobel, who made more than 350 *inventions. In 1895, a year betore he died. he set up the award. Many people think the Nobel Prize is the greatest award a person can receive. Twenty two people from Japan have received the Nobel Prize. Recently, awards were given to three scientists from Japan in 2014 (for their work in science. These three scientists, Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura, made a bright blue *LED in the 1990s. All three colors are needed to make a white LED. White LEDs are bright, last for a long time, and don't use much *energy. Because of this, white LEDs are becoming more and more popular. They are B than fluorescent lights or *incandescent lights, but people can use them for a longer time. People can use LEDs for about 100,000 hours. That is 10 times as long as people can use fluorescent lights and 100 times as long as people can use incandescent lights. (2 Perhaps you are thinking that these scientists are cleverer than you. Their invention is really special, but they are people just like you. (3) People said that they could not do it. They had to make their own *equipment for their work. they tried more than a thousand times, they still were not able to make a blue LED. But they never gave up and finally they did it. Perhaps one day, if you work hard, you will get the Nobel Prize, too. Nobel Prize ノーベル賞 award LED I'I ・発光ダイオード 蛍光灯 機器 ……………. fluorescent equipment 〜をたたえる 発明品 honor invention energy I: incandescent 白熱灯 .…....

Resolved Answers: 2
English Junior High

なぜ、答えが『ウ』 ではなく『イ』なのか 教えてほしいです🙇‍♀️

次の英文を読んで、問1~問5に答えなさい。 *印のついている語句には,本文のあとに〔注〕があります。(10分) A 1901, the Nobel Prize has *honored men and women from all over the world for great work in science, writing, and peace. The Nobel Prize is an *award that was started in Sweden. The name Nobel Prize comes from a Swedish scientist, Alfred Nobel, who made more than 350 *inventions. In 1895, a year betore he died. he set up the award. Many people think the Nobel Prize is the greatest award a person can receive. Twenty two people from Japan have received the Nobel Prize. Recently, awards were given to three scientists from Japan in 2014 (for their work in science. These three scientists, Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura, made a bright blue *LED in the 1990s. All three colors are needed to make a white LED. White LEDs are bright, last for a long time, and don't use much *energy. Because of this, white LEDs are becoming more and more popular. They are B than fluorescent lights or *incandescent lights, but people can use them for a longer time. People can use LEDs for about 100,000 hours. That is 10 times as long as people can use fluorescent lights and 100 times as long as people can use incandescent lights. (2 Perhaps you are thinking that these scientists are cleverer than you. Their invention is really special, but they are people just like you. (3) People said that they could not do it. They had to make their own *equipment for their work. they tried more than a thousand times, they still were not able to make a blue LED. But they never gave up and finally they did it. Perhaps one day, if you work hard, you will get the Nobel Prize, too. Nobel Prize ノーベル賞 award LED I'I ・発光ダイオード 蛍光灯 機器 ……………. fluorescent equipment 〜をたたえる 発明品 honor invention energy I: incandescent 白熱灯 .…....

Resolved Answers: 1