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新人教版高中英語必修2Unit 3 The Internet-Listening &Speaking＆Talking教案一
Listening and Speaking introduces the topic of “ask about online habits”. Many middle school students have been surfing the Internet for many years, but what they do with the Internet and how much time they spend every day may not be very clear to themselves, nor to other students. This section allows students to investigate their peers' Internet use, which is conducive to their mutual understanding and understanding of the Internet. It can also help them reflect on their own online behavior, learn from other people's good online habits, and get rid of their bad online behavior.The listening text of this section is an investigation interview. The investigators interview specific groups with the same questions to obtain information, so as to understand their views, practices or attitudes on this issue. There are two specific questions: “how much time do you spend online every day? What do you usually do online?”. The answers of the three respondents provide rich and different information, and achieve the purpose of the investigators. The oral discourse structure of survey interviews generally includes greeting and explaining the purpose of the interview, presenting the interview questions and the respondents' answers. Listening and Talking introduces the theme of “choosing the right application ". Listening text is a conversation between Laura and Xiao Bo. In this part of listening, “oink”； “piggy bank” may cause the students' hearing comprehension limitation. Oink refers to sound word and pig's sound. So, add some oink to my piggy bank is often used to describe "making a little money".1. Guide students to understand the content of listening texts in terms of listening for definitions.2. Cultivate students' ability to define words and understand an investigation interview.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案二
Q5：What's Jan's next goal?Her next goal is to start a charity website to raise money for children in poor countries.Q6：What can we learn from her experiences?We learn that when we go through tough times, we can find help and support from other people online. We learn that we can feel less lonelyStep 5: While reading---rethinkingQ1: What is Jan’s attitude to the Internet ?Thankful/Grateful, because it has changed her and her life.Q2: What writing skills is used in the article ?Examples(Jan’s example, the 59-year-old man’s and the 61-year-old woman’s example)Q3: Can you get the main idea of the article ?The Internet has changed Jan’s life/Jan’s life has been changed by the Internet.Step 6 Post reading---Retell the storyMuch has been written about the wonders of the World Wide Web. There are countless articles (1)telling(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)more(much) for people than simply make life more convenient. People’s lives (3) have been changed(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)stuck(stick) at home with only her computer to keep (5)her(she) company. She joined an online group (6)where she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)benefits(benefit). She was so inspired (8)that she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)for children in poor countries. Jan’s life has been (10)greatly(great) improved by the Internet.
新人教版高中英語必修2Unit 3 The Internet-Reading and Thinking教案一
Paragraph 3. Jan decided to start an IT club to teach old people how to use computers and the Internet. Paragraph 4. Jan has started taking online classes to learn more about how to use the Internet to make society better. Paragraph 5. Jan’s life has been greatly improved by the Internet. Step 5: Critical thinking:(1)How do you arrange your time spent on study and the Internet? Is it reasonable? I usually surf the Internet using my mobile phone for only an hour after class, and it is reasonable for me.(2)What are your online activities? Are they safe? I chat with my friends, read news and play games. I never give away my private information so I think they are safe.Step 4: summary Much has been written about the wonders of the World Wide Web. There are countless articles (1)______(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)_____(much) for people than simply make life more convenient. People’s lives (3) _________________(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)_____(stick) at home with only her computer to keep (5)___(she) company. She joined an online group (6)______ she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)_______(benefit). She was so inspired (8)____ she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)___ children in poor countries. Jan’s life has been (10)______(great) improved by the Internet. Step 5 Homework:Review what we have learned and find out the key language points in the text.
人教版高中地理必修3區(qū)域農(nóng)業(yè)發(fā)展教案
1．歸納珠江三角洲發(fā)展基塘生產(chǎn)有利的地理?xiàng)l件。珠江三角洲地勢(shì)低平，河網(wǎng)密布，降水充沛。北回歸線從珠江三角洲的北部穿過。珠江三角洲地區(qū)發(fā)展基塘農(nóng)業(yè)生產(chǎn)有利條件可以結(jié)合材料，歸納為三個(gè)方面：地形、氣候、市場（當(dāng)?shù)睾秃Ｍ猓?．基塘生產(chǎn)將哪些產(chǎn)業(yè)聯(lián)系起來?哪些副產(chǎn)品(或廢棄物)被充分利用起來?這種聯(lián)系對(duì)農(nóng)村經(jīng)濟(jì)發(fā)展有什么作用?基塘生產(chǎn)環(huán)節(jié)將種植業(yè)（桑、蔗等）、養(yǎng)殖業(yè)（養(yǎng)蠶、養(yǎng)魚）、工業(yè)（絲廠、糖廠）等幾種產(chǎn)業(yè)緊密的聯(lián)系在一起。在此環(huán)節(jié)中，塘泥、蠶沙（蠶屎）、蠶蛹、繅絲、濾泥、蔗葉等副產(chǎn)品被充分的回收利用。養(yǎng)蠶業(yè)、蔗糖加工業(yè)同塘魚養(yǎng)殖業(yè)緊密結(jié)合，作為一種綜合的經(jīng)營，幾者之間相互依存、相互促進(jìn)、揚(yáng)長補(bǔ)短，有機(jī)地循環(huán)聯(lián)系起來?；旧辖鉀Q了桑、蔗的肥料和蠶、魚的飼料問題。不僅養(yǎng)蠶、蔗糖加工和養(yǎng)魚生產(chǎn)穩(wěn)定，而且成本也大大降低。
新人教版高中英語必修2Unit 3 The Internet-Discovering Useful Structure教案一
This unit is about the Internet, which has a great influence to our humans and our lives. During the Listening & Speaking & Talking and Reading and Thinking section, the influence in examples has been shown. Thus, use the Present Perfect Tense is appropriate. However, in order to show the justice or weaken the doer of the behavior/action, it’s better to use the Present Perfect Passive Voice than the Present Perfect Tense. Besides, having learned to use the Present Perfect Passive Voice, students can beautify their language in their writing. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. 1. Learn the structure of the Present Perfect Passive Voice and its functions. 2. Learn to change the sentences with the Present Perfect Passive Voice into the sentences with the Present Perfect Passive Voice. 3. Learn to write sentences with the Present Perfect Passive Voice flexibly according to the context. Step 1 Observe the following sentences, then change the sentences into passive voice.He has been selected to take part in the sports meeting．(肯定句)他已被挑選出來參加運(yùn)動(dòng)會(huì)。The ink has not been removed from his overcoat．(否定句)墨跡還沒有從他外套上去掉。
新人教版高中英語必修2Unit 3 The Internet-Reading For Writing教案一
⑦identity theft 身份盜竊⑧chat room 聊天室⑨draft your blog post 起草博客帖子⑩post embarrassing photos 張貼尷尬照片 【話題句式】 1. How do you stay safe online and avoid bad experiences on the Internet? 你如何在網(wǎng)上保持安全, 避免在網(wǎng)上的不良經(jīng)歷? 2. I’m not an expert, but many years as a blogger have taught me a thing or two. 我不是專家, 但作為一個(gè)博主, 我已經(jīng)學(xué)了好幾年了。 3. If you see or read something that makes you feel uncomfortable, leave the site immediately. 如果你看到或讀到一些讓你覺得不舒服的東西, 立即離開這個(gè)網(wǎng)站。4. Don’t give out your address or phone number. 別告訴別人你的地址或電話號(hào)碼。 5. Identity theft is a common and serious problem. 身份盜竊是一個(gè)常見而嚴(yán)重的問題。6. Being online is no excuse for being rude, and you don’t want to become a target for a troll or cyberbully. 上網(wǎng)并不是無禮的借口, 你也不想成為發(fā)挑釁帖子的人或網(wǎng)絡(luò)惡霸的目標(biāo)。 7. Trolls often use several false names so that they can stay on a site. 發(fā)挑釁帖子的人經(jīng)常使用幾個(gè)假名, 這樣他們就可以留在一個(gè)網(wǎng)站上。8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。
人教版高中歷史必修3從蒸汽機(jī)到互聯(lián)網(wǎng)教案
（2）根據(jù)材料二與所學(xué)知識(shí)，從經(jīng)濟(jì)、政治、思想文化三個(gè)方面，分析歐洲近代科技迅速發(fā)展的原因。答：資本主義工商業(yè)的成長刺激了對(duì)技術(shù)的需求，為近代科技的發(fā)展提供了工具和手段；資產(chǎn)階級(jí)革命為資本主義發(fā)展、科技進(jìn)步開辟了道路；人文主義和理性精神解放了思想，推動(dòng)近代科技迅速發(fā)展。（如答出其它原因，言之有理，可酌情加分，但不得超過該問總分）（3）根據(jù)材料二三與所學(xué)知識(shí)，分析清代（鴉片戰(zhàn)爭前）中國科技發(fā)展停滯的原因。答：君主專制維系腐朽制度；重農(nóng)抑商、閉關(guān)政策阻礙資本主義萌芽發(fā)展；自然經(jīng)濟(jì)不能提供近代科技發(fā)展的物質(zhì)基礎(chǔ)；文化專制政策（或崇尚理學(xué)、八股取士、文字獄等）禁錮思想，摧殘人才，阻礙科技發(fā)展。（如答出其它原因，言之有理，可酌情加分，但不得超過該問總分。）（4）簡述從中西方科技發(fā)展變化的歷史中得到的啟示。答：評(píng)分說明：圍繞生產(chǎn)力發(fā)展，政治經(jīng)濟(jì)變革、思想解放與科技發(fā)展的關(guān)系等任一角度回答，言之有理，均可酌情賦分
人教版高中歷史必修3啟蒙運(yùn)動(dòng)教案2篇
教學(xué)目標(biāo)：1、知識(shí)與能力：（1）識(shí)記：理性、啟蒙運(yùn)動(dòng)；伏爾泰、孟德斯鳩、盧梭等偉大的啟蒙思想家及其主張；康德及啟蒙運(yùn)動(dòng)的影響；（2）理解啟蒙運(yùn)動(dòng)興起的背景，分析啟蒙思想的巨大影響；（3）認(rèn)識(shí)上層建筑對(duì)社會(huì)發(fā)展的巨大反作用。2、過程與方法：（1）指導(dǎo)學(xué)生用表格法掌握啟蒙運(yùn)動(dòng)主要代表人物及其思想主張；（2）運(yùn)用比較法加深對(duì)啟蒙思想家觀點(diǎn)共性和個(gè)性的認(rèn)識(shí)。（3）運(yùn)用比較法對(duì)比文藝復(fù)興和啟蒙運(yùn)動(dòng)的異同，說明啟蒙運(yùn)動(dòng)對(duì)人文主義思想的發(fā)展。3、情感態(tài)度與價(jià)值觀：（1）通過本課的學(xué)習(xí)，讓學(xué)生認(rèn)識(shí)到“一定的文化是一定社會(huì)的政治和經(jīng)濟(jì)在觀念上和形態(tài)上的反映”；（2）學(xué)習(xí)啟蒙思想家追求真理的精神，培養(yǎng)學(xué)生遠(yuǎn)大的理想與抱負(fù)；（3）通過法國啟蒙思想產(chǎn)生的巨大影響的分析，使學(xué)生認(rèn)識(shí)意識(shí)形態(tài)對(duì)社會(huì)發(fā)展所起的重大作用，從而提高學(xué)習(xí)理論的自覺性。
新人教版高中英語必修1Unit 3 Sports and Fitness-Reading and Thinking教案
2. Sort out detailed information about Michael Jordan.（1） Understand the transitional sentence.Q: Which part is about Michael Jordan as a master? Which part is about the example he set?（2） Have the Ss Focus on why Michael Jordan is a master and what good examples Michael Jordan set when they’re reading. And think about these questions as below:Q1: How does the author describe his impressive skills?Q2: How do you understand “time seemed to stand still”?Q3: What does “graceful” mean?Q4. Which sentence do you think best describes his mental strength?Q5. Which words is important in the sentence in describing his mental strength? Why?Q6: How do you understand “unique”?Q7: What can we learn from Michael Jordan?Step 5 Discussing and recommendingRecommend their own living legends of sports.Work in groups to choose your own living legend of sports and give the reasons of your choice. Step 6 HomeworkReview the stories of Lang Ping and Michael Jordan, and try to retell them.
新人教版高中英語必修1Unit 3 Sports and Fitness-Reading for Writing教案
Then have them write a short paragraph to describe and explain their changes. After that, get the Ss to exchange their drafts with their partners and use the checklist to give feedback on their drafts, and finally revise it.Step 5 Summary of how to write a wellness book1.健康書的審題步驟：第一步：明確要求該寫作屬于經(jīng)驗(yàn)分享，故要用第一人稱來寫;時(shí)態(tài)以一股現(xiàn)在時(shí)為主。第二步：確定段落該類文章可以從以下三個(gè)方面人手:Para.1首先表明寫作的目的Para.2自己的做法及心得體會(huì)Para.3表示期望及感謝第三步：提煉要點(diǎn)2.健康書常見句式：1) It is an honor for me to share my favorite sport with you,2) It makes me feel relaxed playing with my friends.3) It makes me rid myself of stress while playing with my friends.4) Moreover, it provides me a valuable chance to communicate with others.5) I we eat too little or too much, or if we choose the wrong food, we may become sick.6) We can do something to change the poor situation.Step 6Homework假如你的老師讓你在班級(jí)Wellness Bok上分享自己的親身經(jīng)歷及心得，請(qǐng)根據(jù)以下要點(diǎn)寫一篇80字左右的文章1. 你喜歡的運(yùn)動(dòng)是什么？2. 你最喜歡的原因是什么？3. 你參加鍛煉的體會(huì)。
新人教版高中英語必修2Unit 3 The Internet-Discovering Useful Structure教案二
This teaching period mainly deals with grammar “The Present Perfect Passive Voice.” To begin with, teachers should lead students to revise what they have learned about the Present Perfect Passive Voice. And then, teachers move on to stress more special cases concerning this grammar。This period carries considerable significance to the cultivation of students’ writing competence and lays a solid foundation for the basic appreciation of language beauty. The teacher is expected to enable students to master this period thoroughly and consolidate the knowledge by doing some exercises. 1. Guide students to review the basic usages of the Present Perfect Passive Voice2. Lead students to learn to use some special cases concerning the Present Perfect Passive Voice flexibly.2. Enable students to use the basic phrases structures flexibly.3. Strengthen students’ great interest in grammar learning.1. Help students to appreciate the function of the Present Perfect Passive Voice in a sentence2. Instruct students to write essays using the proper the Present Perfect Passive Voice.觀察下列句子特點(diǎn)，總結(jié)共同點(diǎn)。1．(教材P28)Much has been written about the wonders of the World Wide Web．2．(教材P28)But the Internet has done much more for people than simply make life more convenient．3．(教材P28)Many people have been helped by the club．4．(教材P28)She no longer feels lonely, and her company has become quite successful．5．(教材P32)Today I thought I’d blog about a question that has been asked many times—how do you stay safe online and avoid bad experiences on the Internet?
新人教版高中英語必修2Unit 3 The Internet-Reading for Writing教案二
8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。 Step 8 Writing---the articleHow to stay safe in the online chat roomToday I thought I’d blog about a question that has been asked many times--- how do you stay safe online and avoid bad experiences in the online chat room ? I’m not an expert, but many years as a blogger have taught me a thing or two.First of all, there’s the golden rule of the Internet: keep out of what makes you uneasy. Don’t post comments or click on anything. Second, protect your privacy. Don’t give out too much private information like your address, phone numbers, the ID numbers, etc. Third, be polite. If you are polite to others on the Internet, you won’t be attacked in normal situation. Finally, don’t believe in others easily and never meet someone you met online alone. It is very dangerous.Have you had any bad experiences online, or do you have some good advice for staying safe? Post your comments below!Step 9 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Does the writer tell the reader what he/she know about the topic ?2. Are the tips and suggestions well organised ?3. Has the writer defined the new words ?4. Does the author include examples, comparison, or explanations ?5. Does the writer end by asking readers to leave comments and/or suggestions ?6. Can you find any grammar or spelling mistakes.Step 6 HomeworkPut up your revised draft in the classroom or read it to your class.
人教版高中地理必修3產(chǎn)業(yè)轉(zhuǎn)移教案
1．國家石油價(jià)格上漲，導(dǎo)致依賴于國際石油而建立起來的日本重化工業(yè)的制造成本提高，產(chǎn)品價(jià)格相應(yīng)提高，削弱了日本重化工產(chǎn)品在國際市場上的競爭力。2．日元 的大幅度升值，意味著日本產(chǎn)品在國際市場上的價(jià)格大幅度提高。例如，同樣的日本產(chǎn)品，如果原來在國際市場上賣1美元，日元升值1倍后其在國際市場上的售價(jià)就達(dá)2美元。所以，以國際市場為依托的日本傳統(tǒng)產(chǎn)業(yè)只好紛紛向海外轉(zhuǎn)移。3．自身市場滿足不了發(fā)展需求，國際市場上亞洲發(fā)展中國家和地區(qū)的同類產(chǎn)品具有明顯的價(jià)格優(yōu)勢(shì)。所以，日本企業(yè)在其國內(nèi)發(fā)展的空間很小。4．勞動(dòng)力價(jià)格高反映為產(chǎn)品的價(jià)格高，而勞動(dòng)力數(shù)量又滿足 不了企業(yè)進(jìn)一步擴(kuò)展對(duì)勞動(dòng)力的需求。所以，日本從事傳統(tǒng)產(chǎn)業(yè)的國內(nèi)企業(yè)生產(chǎn)受勞動(dòng)力價(jià)格和數(shù)量的雙重制約。5．促進(jìn)日本企業(yè)生產(chǎn)的區(qū)位選擇向國土的南、北部和海外擴(kuò)展。6．“技術(shù)立國”的政策明顯對(duì)傳統(tǒng)產(chǎn)業(yè)在國內(nèi)生產(chǎn)不利，即企業(yè)生產(chǎn)要么向知識(shí)技術(shù)密集型轉(zhuǎn)換（這需要大量的投資），要么轉(zhuǎn)向海外。
人教版高中歷史必修3三民主義的形成和發(fā)展教案
局限性：新三民主義在理論上、綱領(lǐng)上仍然沒有超出資產(chǎn)階級(jí)民主主義的范疇。且與中共民主革命綱領(lǐng)有著原則的區(qū)別。與中共革命綱領(lǐng)相比，新三民主義缺少的內(nèi)容：八小時(shí)工作制、徹底實(shí)現(xiàn)人民的權(quán)利、社會(huì)主義。教學(xué)小結(jié)：（以問題代小結(jié)）（1）本課內(nèi)容涉及孫中山先生一生兩次重要的轉(zhuǎn)變。你知道是哪兩次嗎？在學(xué)生討論的基礎(chǔ)上，教師總結(jié)：孫中山先生一生有兩次重要的轉(zhuǎn)變，第一次是放棄改良而走向革命道路；第二次是在他領(lǐng)導(dǎo)的一系列資產(chǎn)階級(jí)革命活動(dòng)失敗后，接受蘇俄和中共的幫助，把舊三民主義發(fā)展成為新三民主義，實(shí)行“聯(lián)俄、聯(lián)共、扶助農(nóng)工”三大政策，實(shí)現(xiàn)了他一生中最偉大的轉(zhuǎn)變。（2）孫中山先生的這兩次轉(zhuǎn)變說明了什么？這一問題可以讓學(xué)生各抒己見，但教師總結(jié)時(shí)一定要緊扣孫中山先生與時(shí)俱進(jìn)，為民族革命貢獻(xiàn)畢生精力的高貴品質(zhì)。
人教版新課標(biāo)高中物理必修2探究彈性勢(shì)能的表達(dá)式教案2篇
“做功的過程就是能量轉(zhuǎn)化過程”，這是本章教學(xué)中的一條主線。對(duì)于一種勢(shì)能，就一定對(duì)應(yīng)于相應(yīng)的力做功。類比研究重力勢(shì)能是從分析重力做功入手的，研究彈簧的彈性勢(shì)能則應(yīng)從彈簧的彈力做功入手。然而彈簧的彈力是一個(gè)變力，如何研究變力做功是本節(jié)的一個(gè)難點(diǎn)，也是重點(diǎn)。首先，要引導(dǎo)學(xué)生通過類比重力做功和重力勢(shì)能的關(guān)系得出彈簧的彈力做功和彈簧的彈性勢(shì)能的關(guān)系。其次，通過合理的猜想與假設(shè)得出彈簧的彈力做功與哪些物理量有關(guān)。最后，類比勻變速直線運(yùn)動(dòng)求位移的方法，進(jìn)行知識(shí)遷移，利用微元法的思想得到彈簧彈力做功的表達(dá)式，逐步把微分和積分的思想滲透到學(xué)生的思維中。本節(jié)課通過游戲引入課題，通過生活中拉弓射箭、撐桿跳高和彈跳蛙等玩具以及各種彈簧等實(shí)例來創(chuàng)設(shè)情景，提出問題。給學(xué)生感性認(rèn)識(shí)，引起學(xué)生的好奇心；讓學(xué)生對(duì)彈簧彈力做功的影響因素進(jìn)行猜想和假設(shè)，提出合理的推測(cè)，激發(fā)學(xué)生的探索心理，構(gòu)思實(shí)驗(yàn)，為定性探究打下基礎(chǔ)。然后，引導(dǎo)學(xué)生通過類比重力做功與重力勢(shì)能的關(guān)系得出彈簧彈性勢(shì)能與彈簧彈力做功的關(guān)系。
人教版新課標(biāo)高中地理必修2第四章第二節(jié)工業(yè)地域的形成教案
在經(jīng)濟(jì)水平較高、工業(yè)地域規(guī)模較大的地區(qū)，其發(fā)展?jié)摿瓦h(yuǎn)不一樣，如鋼鐵工業(yè)。鋼鐵工業(yè)的生產(chǎn)過程比較復(fù)雜(如課本圖5.31)，需要有相互接近的工廠，不僅包括從事鋼鐵生產(chǎn)各道工序的工廠，如燒結(jié)廠、焦化廠、煉鐵廠、煉鋼廠、軋鋼廠，還包括與鋼鐵生產(chǎn)有聯(lián)系的工廠，如氧氣廠、機(jī)修廠、發(fā)電廠、水泥廠等，總共可達(dá)20～30個(gè)工廠。這些工廠集 聚，設(shè)備大，管線長，占地多。因此，這樣形成的工業(yè)地域(鋼鐵工業(yè)區(qū))面積廣，發(fā)育程度高，發(fā)展?jié)摿Υ?。這類工業(yè)地域 再加上為方便眾多工人生活所配置的服務(wù)業(yè)和其他工業(yè)，在發(fā)展過程中，往往由于工業(yè)地域的擴(kuò)展而形成工業(yè)城市。例如，我國的鞍山(“鋼都”)、攀枝花、馬鞍山、包頭(“草原鋼城”)等鋼鐵工業(yè)城市的形成。除此之外，石油化工區(qū)、機(jī)械制造工業(yè)區(qū)等屬于發(fā)育程度高的工業(yè)地域，也往往擴(kuò)展而形成工業(yè)城市。例如，我國的石油城大慶、克拉瑪依，汽車城十堰等。
人教版新課標(biāo)高中物理必修2功率教案2篇
1．用CAI課件模擬汽車的啟動(dòng)過程。師生共同討論：①如果作用在物體上的力為恒力，且物體以勻速運(yùn)動(dòng)，則力對(duì)物體做功的功率保持不變。此情況下，任意一段時(shí)間內(nèi)的平均功率與任一瞬時(shí)的瞬時(shí)功率都是相同的。②很多動(dòng)力機(jī)器通常有一個(gè)額定功率，且通常使其在額定功率狀態(tài)工作（如汽車），根據(jù)P=FV可知：當(dāng)路面阻力較小時(shí)，牽引力也小，速度大，即汽車可以跑得快些；當(dāng)路面阻力較大，或爬坡時(shí)，需要比較大的牽引力，速度必須小。這就是爬坡時(shí)汽車換低速擋的道理。③如果動(dòng)力機(jī)器在實(shí)際功率小于額定功率的條件下工作，例如汽車剛剛起動(dòng)后的一段時(shí)間內(nèi)，速度逐漸增大過程中，牽引力仍可增大，即F和v可以同時(shí)增大，但是這一情況應(yīng)以二者乘積等于額定功率為限度，即當(dāng)實(shí)際功率大于額定功率以后，這種情況不可能實(shí)現(xiàn)。
人教版新課標(biāo)高中物理必修1彈力教案2篇
一般情況下，凡是支持物對(duì)物體的支持力，都是支持物因發(fā)生形變而對(duì)物體產(chǎn)生彈力。所以支持力的方向總是垂直于支持面而指向被支持的物體。例1：放在水平桌面上的書書由于重力的作用而壓迫桌面，使書和桌面同時(shí)發(fā)生微小形變，要恢復(fù)原狀，對(duì)桌面產(chǎn)生垂直于桌面向下的彈力f1，這就是書對(duì)桌面的壓力；桌面由于發(fā)生微小的形變，對(duì)書產(chǎn)生垂直于書面向上的彈力f2，這就是桌面對(duì)書的支持力。學(xué)生分析：靜止地放在傾斜木板上的書，書對(duì)木板的壓力和木板對(duì)書的支持力。并畫出力的示意圖。結(jié)論：壓力、支持力都是彈力。壓力的方向總是垂直于支持面而指向被壓的物體，支持力的方向總是垂直于支持面而指向被支持的物體。引導(dǎo)學(xué)生分析靜止時(shí)，懸繩對(duì)重物的拉力及方向。引導(dǎo)得出：懸掛物由于重力的作用而拉緊懸繩，使重物、懸繩同時(shí)發(fā)生微小的形變。重物由于發(fā)生微小的形變，對(duì)懸繩產(chǎn)生豎直向下的彈力f1，這是物對(duì)繩的拉力；懸繩由于發(fā)生微小形變，對(duì)物產(chǎn)生豎直向上的彈力f2，這就是繩對(duì)物體的拉力。
人教版新課標(biāo)高中物理必修1摩擦力教案2篇
l．知識(shí)與技能：（1）知道摩擦力產(chǎn)生的條件。（2）能在簡單問題中，根據(jù)物體的運(yùn)動(dòng)狀態(tài)，判斷靜摩擦力的有無、大小和方向；知道存在著最大靜摩擦力。（3）掌握動(dòng)磨擦因數(shù)，會(huì)在具體問題中計(jì)算滑動(dòng)磨擦力，掌握判定摩擦力方向的方法。（4）知道影響到摩擦因數(shù)的因素。2．過程與方法：通過觀察演示實(shí)驗(yàn)，概括出摩擦力產(chǎn)生的條件及摩擦力的特點(diǎn)，培養(yǎng)學(xué)生的觀察、概括能力。通過靜摩擦力與滑動(dòng)摩擦力的區(qū)別對(duì)比，培養(yǎng)學(xué)生分析綜合能力。3．情感態(tài)度價(jià)值觀：在分析物體所受摩擦力時(shí)，突出主要矛盾，忽略次要因素及無關(guān)因素，總結(jié)出摩擦力產(chǎn)生的條件和規(guī)律。二、重點(diǎn)、難點(diǎn)分析1．本節(jié)課的內(nèi)容分滑動(dòng)摩擦力和靜摩擦力兩部分。重點(diǎn)是摩擦力產(chǎn)生的條件、特性和規(guī)律，通過演示實(shí)驗(yàn)得出關(guān)系f=μN(yùn)。2．難點(diǎn)是學(xué)生有初中的知識(shí)，往往誤認(rèn)為壓力N的大小總是跟滑動(dòng)物體所受的重力相等，因此必須指出只有當(dāng)兩物體的接觸面垂直，物體在水平拉力作用下，沿水平面滑動(dòng)時(shí)，壓力N的大小才跟物體所受的重力相等。
人教版新課標(biāo)高中物理必修2平拋運(yùn)動(dòng)教案2篇
（五）平拋運(yùn)動(dòng)規(guī)律的應(yīng)用例1：一架老式飛機(jī)在高出海面45m的高處，以80m/s的速度水平飛行，為了使飛機(jī)上投下的炸彈落在停在海面上的敵船，應(yīng)該在與轟炸目標(biāo)的水平距離為多遠(yuǎn)的地方投彈?不計(jì)空氣阻力。分析：對(duì)于這道題我們可以從以下幾個(gè)方面來考慮：(1)從水平飛行的飛機(jī)上投下的炸彈，做什么運(yùn)動(dòng)?為什么?(2)炸彈的這種運(yùn)動(dòng)可分解為哪兩個(gè)什么樣的分運(yùn)動(dòng)?3)要想使炸彈投到指定的目標(biāo)處，你認(rèn)為炸彈落地前在水平方向通過的距離與投彈時(shí)飛機(jī)離目標(biāo)的水平距離之間有什么關(guān)系?拓展：1、式飛機(jī)在高出海面45m的高處，以80m/s的速度水平飛行，尾追一艘以15m/s逃逸的敵船，為了使飛機(jī)上投下的炸彈正好擊中敵船，應(yīng)該在與轟炸目標(biāo)的水平距離為多遠(yuǎn)的地方投彈?不計(jì)空氣阻力。2、在一次摩托車跨越壕溝的表演中，摩托車從壕溝的一側(cè)以速度v＝40m/s沿水平方向向另一側(cè)，壕溝兩側(cè)的高度及寬度如圖所示，摩托車可看做質(zhì)點(diǎn)，不計(jì)空氣阻力。（1）判斷摩托車能否跨越壕溝？請(qǐng)計(jì)算說明（2）若能跨過，求落地速度？
