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物理 高校生

(2)について質問です。 初速度v0について考えなくてもいい理由を教えてください

18:36 8月30日 (水) 戻る 学習時間 11:34 解説を見る 前回:-* ☆お気に入り登録 23 FTIR SVEICA ニューグローバル物理基礎 (新課程) p.50 1編 物体の運動とエネルギー 2章 さまざまな力とそのはたらき ●正答率: 単元の進捗 18.8% 達成度: 結果の入力 基本例題 20 水平となす角0の滑らかな斜面上で,質量mの物体を滑ら せる。重力加速度の大きさをgとする。 (1) 物体を斜面の上端に置いて静かに手放した。 物体が斜面 を滑り降りるときの加速度の大きさを求めよ。 (2)物体を斜面の下端に置いて斜面に沿って上方に初速度 vo を与えた。 物体が斜面を上昇するときの加速度の大きさを求めよ。 34.1% m [解説] (1) 斜面に平行下向きを正, 加速度をaとする。 運動方程式は, ma=mgsin0 よって, a=gsin0 「斜面に平行上向きを正, 加速度を d' とする。 運動方程式は, "ma'=-mgsin O よって, d' =-gn0 これより, 加速度の大きさは gsin0 前回結果 初挑戦 前回 --月--日 0 垂直抗力 N mgsine mgcoso 重力 mg ll 24% (1), (2) とも同じ斜面下向きに大きさgsin 0 の加速度を生じる。 この加速度の大きさは,質量mが解 答に残っていないことから, 物体の質量に関係しないことがわかる。 7 書込開始」

解決済み 回答数: 1
英語 高校生

答えを教えてください!解いたんですが友達と違っていて、教えて欲しいです。 よかったら,根拠も教えてください

January 10 Ms. Erin Murphy Customer Service Department Westcoast Airlines Major Miles Program 345 Brook Street Dallas, TX 75218 Dear Ms. Murphy, As per your request during our telephone conversation on January 8, I am sending you Los Angeles International Airport last December. Please note that my ticket was upgraded itinerary and ticket number for my recent roundtrip flight from JFK International Airport business class with a Major Miles Gold Class voucher and should therefore be eligible fo full business class mileage credit. I am a Gold member in the Major Miles program and have been a Westcoast customer f over 15 years. I must confess that I find the new restrictions to your flight voucher pla genuinely confusing. I fail to understand why the burden of proof for my mileage cred rests with me. Shouldn't this information be on your ticketing computer? 62 Section II This was my itinerary. My ticket number was #YB42565697. My seat number was 14B. Departed JFK, December 22 at 10:20 for LAX Returned to JFK from LAX on December 29 at 16:40 7B My Major Miles number is # 04356721 (Gold Card). I sincerely hope that this issue will be resolved quickly as I am counting on my miles earned during this trip to upgrade my hotel room next May. Thank you very much for your attention in this matter. Sincerely Yours, Jarrod Watkins Jarrod Watkins 4. 5. 6. What does Ms. Murphy do? (A) She makes airline reservations. (B) She deals with unhappy customers. (C) She issues new tickets. (D) She upgrades people to business class. What is the purpose of this letter? (A) To upgrade his ticket to business class (B) To buy a flight upgrade coupon (C) To complain about his seat reservation (D) To receive more mileage credits How does Mr. Watkins feel about the new frequent flier program rules? (A) He would like them to be simpler. (B) He believes they are unfair. (C) He finds them to be convenient. (D) He hopes that they will benefit Gold Card members more. Which of the following is NOT mentioned in the letter? (A) His ticket number (B) His frequent flier level (C) His credit card number (D) His flight information inaba na basa Juu) stevir) | atunim's New malum Unit 2: Letters, E-mails, & Text message chains 63

未解決 回答数: 1