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刹车装配中的迷信常识——九年级物理上册《机器能》讲授进程记实
宣布时候: 2020-08-12 来历:中国教导报

讲授背景

《jiqineng》shijiunianjiwulishangcedisanzhangdierjiedeneirong。zheijiekeneirongduo、nanduda,dadadoujiaoyuanzaishangwanyizhangdexinkejinhou,huizhipei《jiqineng》dezhuantiwenxi,yiqijiangsuoxueguandianbujuhua、tixihua。zhengjiekehuanrao“chachezhuangpei”tingzhiyantao,bingshexianglesangeshiming。congdianfanceyankaoshizhongde“chachezhuangpei”daoqichede“chachezhuangpei”,zaidao “chachezhuangpei”deshexiang。jingyoujincheng“chachezhuangpei”deqingjingxian,tingzhidongnengjuxideshufa、dongnengdezhuanhuadengchangshideshendujinxiu,shixianshengdesiweidaodalianxiguanxituozhanchengdu。

讲授实录

shi:10yue1ri,xiaomingbaikouyiluzuochedaowaibuwanshua,zaigaosugonglushangfamingqichedechacheshiling,yijiarenmashangduorufaji。shangmianzanmenyilupangguanyixianeishideshipin,zaipangguandejinchengzhongsilvruxulianggetimu:shipinzhongshikongdeqichejubeishenmeneng?wutiyou“neng”nenggouduiwaizuogong,zanmennenggoujingyoujinchengshenmelaipandingshikongqiche“neng”dejuxi?

sheng:shipinzhongshikongdeqichejubeidongneng。

sheng1:chanshengchehuoshi,nenggoujingyoujinchengqichepohuaichengdulaipandingneishidongnengdejuxi。

shi:shipinzhong,qichedeshenmezhuangpeishilingle?

sheng2:chachezhuangpei。

shi:chachezhuangpeideganhuashishenme?

sheng2:shijiangqichededongnengjianxiao,jiangqichededongnengzhuanhuachengqiyuqingshideneng。

shi:hao,mingtianzanmenjiuyilulaiyantaoyixiachachezhuangpei。

dianfanshimingyi:jingyoujinchengleibiqiche,ganchuganranceyankaoshizhongde“chachezhuangpei”

shi:qingdashikanyigedianfanceyankaoshishipin(jietuyixia),bingsilvyixiajigetimu。

shi:gaiceyankaoshideyantaogongju、yantaomubiaoshishenme?

sheng1:gaiceyankaoshideyantaogongjushixiaoqiu,yantaowutidedongnengyushenmeshenfenyouguan。

shi:xiaoqiudedongnengjuxiyushenmeshenfenyouguan?

sheng2:yuxiaoqiudesulvhepinzhiyouguan。

shi:zaiceyankaoshijinchengzhong,xiaoqiudedongnengshizaibiangengde,zanmenyantaoxiaoqiunayidiandedongneng?

sheng3:zaipengzhuangdianbshidedongnengjuxi。

shi:xiaoqiuzaibdiandedongnengconghezhuanhuaerlai?chakanzhuomianyiqi,silvzhuanhuadongnengdeqiyufangshi。

(xianshengfenxiaozutingzhijiaohuan)

sheng4:yongshoutui,shixiaoqiuzaibdiangouchengdongneng。

sheng5:yongdanhuangtui,shixiaoqiuzaibdiangouchengdongneng。

sheng6:yongdanbaitui,shixiaoqiuzaibdiangouchengdongneng。

shi:shefahenyouchuangyi,dashinenggouyongzhuomiandeyiqiceyankaoshiyixia。

(xianshenganzhaozhuomianyiqiqitouceyankaoshi)

shi:chabiedefangshidoushixiaoqiuzaibdianchuyoudongneng,kefoushuoyixiayuxiemianchanshengxiaoqiudongnengdequfen?

sheng7:yongshoutuishixiaoqiuzaibdiangouchengdongneng,bunengzuodaomeicidouyiyang。

sheng8:yongdanhuangtuishixiaoqiuzaibdiangouchengdongneng,bunengzuodaomeicidounengpengzhuangxiaomukuai。

sheng9:yongdanbaituishixiaoqiuzaibdiangouchengdongneng,bunengzuodaomeicidounengpengzhuangxiaomukuai。

shi:zheixiefangshidouyonglenengliangdezhuanyihezhuanhua,keshijingqueduheshenglilvburujiangyishangdeceyankaoshigao。

shi:xiaoqiucongbdiandaocdian,sulvjianxiaodao0,xiaoqiujianxiaodedongnengdaoneiliqule?

sheng10:youyuxiaoqiudetuili,xiaomukuaijiangfumocalizuogong,xiaoqiudedongnengzhongjiuzhuanyiqiezhuanhuaweixiaomukuaideneineng。

shi:cijinchengzhongnenggoujingyoujinchengshenmefanyingxiaoqiuzaipengzhuangdianbdiandedongnengjuxi?

sheng10:xiaomukuaidenuodongjiange。

shi:henhao,zheishimixintantaozhongdechangchangshiyongfangshi,zanmenchengweizhuanhuanfa。

shi:xiaoqiudongnengdejuxihainengzhuanhuachengnaxienenggoujianjiezhangliangdewuliliang?

sheng11:nenggourangxiaoqiuquzhuangjimianfentuan、xiangpini,zhangliangtuqishendu。

sheng12:nenggourangxiaoqiuquzhuangjijimu,jiliangzhuangdaodejimushumu。

sheng13:nenggourangxiaoqiuzaishoujinshangdongdan,zhangliangdongdandejiange。

shi:ceyankaoshizhongdexiaoqiuzaimukuaiganhuaxiatingxia,qichezaichachetixiganhuaxiaboche,ruoshijianghuodongdexiaoqiudangzuojichideqiche,xiaomukuaixiangchengyuqichedechachezhuangpei。xiaoqiubumukuaijiangmeifajisutingxia,weileshishiboche,qicheyaoyouchachezhuangpei。

(shexiangqitu:tuqizhuanhuanfa、leibifa、mozifadecaozong。leibifadeganhuashi“youcijibi”,leibisiweidejinchengbianshiyigetuilijincheng。xianshengjianggaosuxingshideqichejiasujinchengzhuanhuaweixiaoqiudehuodongjincheng,caozongwulimozijianhuaxianshipangzajincheng,tuqishouyaoshenfen,biaoxianleconghukouzouxiangwulidezhuyaosiwei)

dianfanshiminger:jingyoujinchengyueduziliao,linghuiqichezhongde“chachezhuangpei”

shi:weileshishiboche,qicheyaoyouchachezhuangpei,shangmianzanmenpangguanshipinbingsilvjigetimu。

(xianshengpangguanqichechachezhuangpeideshimingdaoliheshipin,yueduyouguanqichechachezhuangpeidexianrong)

shi:feichideqichegaojizhidongshi,dongnengruohebiangeng?

sheng:qichededongnengjianxiao。

shi:dongnengzhuanhuachenglechachetixishenmeqingshidenengle?

sheng1:neineng。

shi:shiyizaipanhouziluxiaposhi,youyuchangchangchache,chachetixineinengzengtian,chachepanwendujiangdi,huiyingxiangchachedejieguo,jiqibianluan。

shi:luntaiyukongzhongbudahuashi,qichedechachejiangeyunaxiewuliliangyouguan?

sheng2:zengdachachejiangedeliang:qichedezongdongneng(m,v);jianxiaochachejiangedeliang:chachepanyuqiandemocali(f ), chachepandejuxi。

shi:dahuoche、xiaoqicheweishenmebunengchaozai、chaosu?

sheng3:chaozai、chaosushiqichededongnengzengda,nengduiwaizuogengduogong。chacheshichachepanjiangfumocalizuogong,buyimocalixiadongnengdadechechachepandongdandequanshuzengtian,qicheyaodianmogengzhangdejiangenenglitingxia。

shi:weishenmezaiyiyangtujingshang,chabiedechexingxiansubuyiyang?

sheng4:chabiedechexingzaiyiyangtujingshangdongnengchabie,chachetixiyechabie。chachehou,qichebixuzaibiranguimoneitingxia,zheijiuxuyaobirandexiansu,chabiedechexingchabiedexiansu。

shi:f1saicheweishenmezuigaosulvzheimegao?

sheng5:youyuf1saicheyougenghaodechachetixi,shidediaosuxingshidesaicheyenenggouzaihuadingjiangeneiboche。

(shexiangqitu:weishenmebunengchaozai、chaosushiyigetixitimu,xianshengyingdangzhandegenggaonenglihuifudegengjingque。xianshengjingyoujinchengziliaolinghuiqichechachezhuangpeideshimingdaoli,linghuigudaiqichechanyedechachetixishexiang,tuozhanchangshimian,jiqijinxiulequ)

dianfanshimingsan:jingyoujinchengfenzuhuishang,shexiangqichezhongde“chachezhuangpei”

shi:chachezhuangpeiduijiashizheeryanbianshixingmingdebaozheng,qingtongchuangmenlianxiceyankaoshiheziliaosilvbinghuishangruoheshexiangningjingdechachezhuangpei?

sheng1:jiadachachepanzhijing,nenggoujinbuchachedejieguo。

sheng2:jiadapanyuqiandeyalihecuzhuochengdu,nenggoujinbuchachedejieguo。

sheng3:yaotiaoxuanhaodeluntai,buqingyidahua。

sheng4:chachepannaidiwen,zhangshihouxiapoqichedechachejieguobuhuishiling。

sheng5:yaozengtianyoumenhechachedewucaizhuangpei,zengtianqichedexiansuzhuangpei。

shi:youdechezhubachelungaidayihao,kanqilainenggougengyingwu,shibushigongdao?

sheng6:bugongdao,chachezhuangpeiruoshibuzengqiang,huiyingxiangchachejieguo。

shi:youdechezhubaqichedenengyuangaida,nenggoukaidegengkuaiyixie,shibushigongdao?

sheng6:yebugongdao,chachezhuangpeiyuqichedenengyuanshiyaohunpeide,zhigainengyuanhuizengtianchachejiange。

shi:wanyizaigaosugonglushangchacheshilingruoheban?

sheng7:zaigaosugongludezhangxiapo、jiwan、bianluanpinfadiduanyouhuanchongdai,kaishangqujiunenggouboche。

shi:henhao,zheileihuanchongdaifanshiyousha、shi、turangyishierjian,gongyongyuzhidongshengxiaocheliangdejiashiyuanzidong“zhuang”shangzheixieshashiduiyidaodajiasudemubiao。

shi:zuoweichuzhongsheng,zanmenruoheningjingchuxing?

sheng8:buchuanghongdeng,tishiqinrenbuchaosu、buchaozai,gaosugonglububoche,chachepanzaibanshiqutianranlengque。

(shexiangqitu:xianshengjingyoujinchengxiaozuhuishang,shexianggaijinqichechachezhuangpei,shendulinghuiqichechanyeshexiangdemeili,congwulizouxianghukou。xianshenghuishangningjingchuxingdeyaodian,congdaolishangdongdehukouzhongruohefangzhijiaotongbianluanchansheng,rangxianshengxuenaizhiyong)

jiangshoushensi

wenxikeyaoshangchuxinyi,congchangshizouxiangchangshidecaozong;yongchangshilaichulitimu、quanshijingxiang;congchangshizouxiangqudechangshi、yantaoweizhidefangshi。zaiwenxikeshangrangxianshengwenguerzhixin,yaozhengshiwulichangshiyugudaikejidelianxi,yongshujichangshilaiquanshigongcheng、shexiang、zhuangbeizhongdedaoli。

shangkeqitou,jiaoyuanyi“xiaomingbaikouyilukaichedaowaibuwanshua,zaigaosugonglushangfamingqichedechacheshiling”zuoweikaipianyinru,yongxiangganshipinyinfaxianshengzhuzhong。xianshengjinruzhuangkuanghou,jiangshoububushenqie,yi“chachezhuangpei”weixiansuotingzhichangshiyufangshideshendujinxiu。

zaishimingyizhong,jiaodianchangshishi“yantaodongnengjuxiyushenmeshenfenyouguandeceyankaoshi”,baohanceyankaoshimubiao、daoli、buzhou、lunduan;jiaodianfangshishi:zhuanhuanfa、jiezhibianliangfa;siweichengdudaodaduodianbujuchengdu。shimingshixianhoutichu:ceyankaoshizhongdexiaoqiuzaimukuaiganhuaxiatingxia,qichezaichachetixiganhuaxiaboche,ruoshijianghuodongdexiaoqiudangzuojichideqiche,xiaomukuaixiangchengyuqichedechachezhuangpei。xiaoqiubumukuaijiangmeifajisutingxia,weileshishiboche,qicheyaoyouchachezhuangpei,yinchudiergeshiming。

zaishimingerzhong,xianshengjingyoujinchengyuedushiqianchoubandeziliaolinghuichachezhuangpei,ziliaozhongdejiaodianchangshishi:chachezhuangpeishiyigejiangdongnengzhuanhuaweineinengdezhuangpei,bingqieshijingyoujinchengmocalizuogongdefangshi;jiaodianfangshishi:leibifa、mozifa;siweichengdudaodalianxiguanxibujuchengdu。

zaishimingsanzhong,jingyoujinchengfenzuhuishang,shexiangqichezhongde“chachezhuangpei”。yongchangshichulixianshitimu,xianshengfenzuhuishangshexiangchachezhuangpei,binghuishangchacheshilingruoheban?huishangningjingchuxingdeyaodiandeng。

benjiekeshexiangdechangshizhuxianzhongqianfufangshifuxian,kuadalezhuanhuanfa,wenxilejiezhibianliangfa,yinchuleleibifa,yanshilemozifa。benjiekedeshexiangyebinizhengshisiweidejinsheng,yisolofenleichanfa,xianshengdesiweibujucongdandianbujudaoduodianbujuzaidaolianxiguanxi,zuichudaolongtongtuozhanbuju,chengduzhubujinbu,heshirenzhijilv。

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