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物理 高校生

画像1枚目の(5)について質問です。 Aの鉛直方向について運動方程式を立てて、画像2枚目のように考えたのですが、有り得ない答えとなってしまいました。解答は(15/32)Mgなのですが、どこで間違えているのかが分からないため、教えてください。 ((1)~(4)は合っていまし... 続きを読む

8 運動方程式 M を 物体A(質量 M)およびB(質量 C 2 A 糸の両端に結び, Aを滑らかな斜面上にお き,Bを斜面の上端に取り付けた滑車を通 してつり下げる。 いま, Aを手で支え,そ ノー の水平な上面に物体Cをのせてから, Aを 静かに放したら, AはCをのせたまま斜面 こ に沿って加速度(gは重力加速度)で滑 B 8 りおり始めた。Aが距離しだけ進んだとき, CをAの上から取り去ったところ, Aはその後一定の速度で滑りおり ていった。 (1) 斜面が水平面となす角はいくらか。 加速度運動をしているときの糸の張力はいくらか。 (3) 等速度運動をしているときのAの速さはいくらか。 (4)物体 Cの質量はいくらか。 (5)加速度運動をしているときCがAに及ぼす鉛直方向の力はいくら か。 Pmg (6) 加速度運動中, CとAの間に滑りを起こさないためには, 両者聞 の静止摩擦係数はいくら以上でなければならないか。 (兵庫県立大)

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英語 高校生

以下の写真はソフィー・ハウの「世界をより良くするための教訓」という文章の一部なのですが、オレンジで線を引いた部分をどのように訳せば良いか分からないため、教えてください。 hold someone to accountで「~に責任を問う」ということから、「そのゴールは私によ... 続きを読む

Wales is a small but progressive country, the only country in the world to have legislated to protect the interests of future generations, the only country to have appointed someone independent to oversee this. Across the world, our systems of government, of politics, of economics have tended to act in the short term. And often, the decisions that are taken discount the interests of future generations and the planet. But in Wales, we're trying to change that by passing a law which requires not just our government but all of our main public institutions to demonstrate how they're acting for the long-term and how the decisions they take don't harm the interests of those yet to be born. And so as a mum of five and the world's only future generations commissioner, I want to share with you today some of the lessons we've learned about how we're trying to leave the world better than we found it. First of all, you must involve people in setting long-term goals. Ask them: What's the Wales or the world you want to leave behind to your children and your grandchildren? We held a national conversation -- the Wales We Want -- and people told us, "We want a low- carbon economy. We want you to help us keep people well rather than just treat them when they're ill. We want connected communities and a more equal Wales." And our government legislated to set seven national well-being goals to achieve that. Each institution has to demonstrate how they're meeting those goals, and they're held to account by me. You have to focus on the interconnections between different aspects of well-being. You need to talk often about why it's just as important to public health as it is to the environment to tackle high levels of air pollution, why diversity in the workforce is just as important to economic prosperity as it is to addressing inequality. Our institutions have a legal duty to act beyond their immediate remit to recognize those connections, work with unusual suspects. And so we're seeing hospitals in Wales working with the National Botanic Gardens to create spaces for nature on their sites. We're seeing offices in our environmental agency helping to find solutions to tackle childhood

解決済み 回答数: 1