ÌâÄ¿ÄÚÈÝ
16£®³ÉÓå¸ßÌúÊÇ¡°Ê®Ò»Î塱¹ú¼ÒÖØµãÌú·½¨ÉèÏîÄ¿£¬´Ó³É¶¼¶«Õ¾ÖÁÖØÇ챱վȫ³Ì308km£¬Éè¼ÆÊ±ËÙ350km/h ÕýʽÔËÐУ®2016 Äê1 ÔÂ10 ÈÕ³ÉÓå¸ßÌúÈÕ¿ªÐÐ32 ¶Ô¶¯³µ×éÁгµ£®ÒÔÏÂG8541 ´ÎÁгµÊ±¿Ì±í£¬Èç¹ûÄã³Ë×ø¸Ã´ÎÁгµÂÃÓΣ®Ç󣺣¨1£©´Ó×ÊÖб±ÖÁÓÀ´¨¶«µÄ¾àÀëºÍƽ¾ùËÙ¶È£»
£¨2£©¸Ã´ÎÁгµÈ«³ÌµÄƽ¾ùËÙ¶ÈΪ¶àÉÙkm/h£®
| Õ¾´Î | Õ¾Ãû | µ½´ïʱ¼ä | ¿ª³µÊ±¼ä | Í£Áôʱ¼ä | Àï³Ì |
| 1 | ³É¶¼¶« | ʼ·¢Õ¾ | 17£º23 | ¡ | 0km |
| 2 | ×ÊÖб± | 17£º57 | 17£º59 | 2min | 187km |
| 3 | ÓÀ´¨¶« | 18£º29 | 18£º31 | 2min | 276km |
| 4 | ÖØÇì±± | 19£º03 | ¡£® | ¡ | 308km |
·ÖÎö £¨1£©¸ù¾Ý±íÖÐÊý¾ÝÇó³ö×ÊÖб±ÖÁÓÀ´¨¶«µÄ¾àÀëºÍʱ¼ä£¬ÓÉÆ½¾ùËٶȹ«Ê½v=$\frac{s}{t}$Çó³öËüµÄƽ¾ùËÙ¶È£»
£¨2£©ÓÉÆ½¾ùËٶȹ«Ê½v=$\frac{s}{t}$Çó³öËüÈ«³ÌµÄƽ¾ùËÙ¶È£®
½â´ð ½â£º£¨1£©ÓɱíÖªG8541 ´ÎÁгµ´Ó×ÊÖб±ÖÁÓÀ´¨¶«µÄÔËÐÐʱ¼ät=18£º29-17£º59=30minh=0.5h£»
´Ó×ÊÖб±ÖÁÓÀ´¨¶«µÄÔËÐз³Ì£ºs=276km-187km=89km£¬
´Ó×ÊÖб±ÖÁÓÀ´¨¶«µÄƽ¾ùËÙ¶È£ºv=$\frac{s}{t}$=$\frac{89km}{0.5h}$=178km/h£»
£¨2£©ÒÑ֪ȫ³ÌµÄ·³Ì£ºs×Ü=308km£¬
ÒÑ֪ȫ³ÌµÄÔËÐÐʱ¼ä£ºt×Ü=19£º03-17£º23=1h40min=1$\frac{2}{3}$h£¬
ÁгµÈ«³ÌµÄƽ¾ùËÙ¶Èv×Ü=$\frac{{s}_{×Ü}}{{t}_{×Ü}}$=$\frac{308km}{1\frac{2}{3}h}$=184.8km/h£®
´ð£º£¨1£©´Ó×ÊÖб±ÖÁÓÀ´¨¶«µÄ¾àÀëÊÇ89km£»Æ½¾ùËÙ¶ÈÊÇ178km/h£»
£¨2£©¸Ã´ÎÁгµÈ«³ÌµÄƽ¾ùËÙ¶ÈΪ184.8km/h£®
µãÆÀ ±¾Ì⿼²éÁËÇóÁгµµÄÔ˶¯Ê±¼ä¡¢Ç󯽾ùËÙ¶ÈÄѶȲ»´ó£¬ÓɱíÖÐÊý¾ÝÇó³öÁгµµÄÔËÐÐʱ¼äÊǽâÌâµÄǰÌáÓë¹Ø¼ü£®
| Æ÷²Ä | µçÔ´¡¢¿ª¹Ø¡¢µ¼Ïß¡¢Á½¸öСµÆÅÝ¡¢µçÁ÷±í | ||||||||
| ʵÑé ×°Öà | °´ÏÂͼËùʾµÄµç·ͼÁ¬½ÓʵÎïµç·£¬ÆäÖеçÁ÷±í²âL2µçÁ÷£¬¸ù¾Ýʵ¼ÊÇé¿öÑ¡ÓÃÁ¿³Ì£® | ||||||||
| ¹ý³Ì ²½Öè | £¨1£©±ÕºÏ¿ª¹Ø£¬¼ÇϵçÁ÷±íµÄʾÊý£®ÇëÄãÒÀ¾ÝϱíÊý¾ÝÔÚÓÒ²à±íÅÌÖбê×¢³öCµãµÄµçÁ÷µÄÖ¸ÕëλÖã® £¨2£©¶Ï¿ª¿ª¹Ø£¬·Ö±ð½«µçÁ÷±í½Óµ½A¡¢B£¬ÔÙ×öÁ½´ÎʵÑ飮 | ||||||||
| ±í¸ñ |
| ||||||||
| ½áÂÛ | ʵÑéÖ¤Ã÷£¬ÔÚ²¢Áªµç·ÖУ¬×ܵçÁ÷µÈÓÚ¸÷֧·µçÁ÷Ö®ºÍ£®±í´ïʽ£ºIA+IB=IC | ||||||||
| ÌÖÂÛ | ÓÃͬÑùµÄÆ÷²Ä»¹¿ÉÒÔ̽¾¿´®Áªµç·µçÁ÷µÄ¹æÂÉ£¬½áÂÛÊÇ´®Áªµç·¸÷´¦µÄµçÁ÷¶¼ÏàµÈ£¬¹«Ê½£ºIA=IB=IC |
| A£® | дһ¸ö×Ö | B£® | ÐÄÔàÌø¶¯Ò»´Î | C£® | Õý³£ºôÎüÒ»´Î | D£® | Õ£Ò»ÏÂÑÛ¾¦ |
| A£® | a ÉϵÄһЩÕýµçºÉ×ªÒÆµ½ b ÉÏ£¬Ë²Ê±µçÁ÷·½Ïò a¡úb | |
| B£® | b ÉϵÄһЩÕýµçºÉ×ªÒÆµ½ a ÉÏ£¬Ë²Ê±µçÁ÷·½Ïò b¡úa | |
| C£® | a ÉϵÄһЩµç×Ó×ªÒÆµ½ b ÉÏ£¬Ë²Ê±µçÁ÷·½Ïò a¡úb | |
| D£® | a ÉϵÄһЩµç×Ó×ªÒÆµ½ b ÉÏ£¬Ë²Ê±µçÁ÷·½Ïò b¡úa |
| A£® | ³µÁ¾Æô¶¯Ê±£¬³µÂÖÓëµØÃæ¼äµÄĦ²Á | B£® | ¿ªÃÅʱ£¬ÃÅÖáÓëÖáÌ×¼äµÄĦ²Á | ||
| C£® | ÊÖÎÕÆ¿×Óʱ£¬ÊÖÓëÆ¿×Ó¼äµÄĦ²Á | D£® | ÍÆ¹öÓÍͰʱ£¬ÓÍͰÓëµØÃæ¼äµÄĦ²Á |
| A£® | µçÁ÷±íʾÊý±ä»¯ÁË0.6A | B£® | µç·ÏûºÄµÄ×ܹ¦Âʱ仯ÁË5W | ||
| C£® | R1ÏûºÄµÄµç¹¦Âʱ仯ÁË7W | D£® | µçѹ±íʾÊý±ä»¯ÁË4V |