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英語 高校生

仮定法の範囲です! 6〜21、20、24〜26の答えあってるか確認して欲しいです!不正解の場合正しい回答も教えてくれると助かります🙇‍♂️

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物理 高校生

(1)なぜ3枚目のように求めてはいけないのですか?

演習 8-2 図のように, ばね ばね定数k) の一端を天井に固定し、他端に小物体(質量 mg だけ伸びたところでつり合った (重力加速度の m) を接続すると, ばねが k 大きさg). ばねが自然長となる小物体の位置を原点として, 鉛直上向きにx軸 を定め, x軸に沿った小物体の運動を考える. 小物体の位置を座標xを用いて表 し、速度をv, 加速度をaと記す. mg の位置から,x=0の位置までゆっくりと運ん (1) 小物体に外力を加え x=- k だ.この間の外力の仕事 W を求めよ. 時刻 t=0にx=0の位置で, 小物体を静かに放した. (2) 運動方程式より k mg - - /h2² ( x + m²) m k ma=-kx-mg となる. 運動を時間追跡し, その結果を用いて, v²をxの 関数として表せ. (3) 運動エネルギーの変化が, 弾性力と重力によってされた 仕事に等しいことを用いて, ぴとxの間の関係式を作れ. (4) 運動エネルギーと弾性エネルギーの和の変化が,重力に よってされた仕事に等しいことを用いて, v2とxの間の関 係式を作れ. (5) 運動エネルギーと弾性エネルギーと重力の位置エネル ギーの和が保存することを用いて, v”とxの間の関係式を 作れ. .. a=- ooooooo 方針 (1)は仕事の計算. 外力を求め, 仕事の定義に従って計算すればよい. 一方で, 外力以外に現れる力は,重力と弾性力のみであるから, エネルギー収支から仕 事を逆算することもできる. (2)以降は,単振動であるから、時間追跡もエネルギーでの扱いもできる. そ こで,演習8-1 と同様に,指示に従って各手順を確認しておく. よって、仕 物体と に

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