ÌâÄ¿ÄÚÈÝ

2011Äê11ÔÂ12ÈÕÍí11ʱ58·Ö£¬Çá¹ìÁгµ´ÓÁ½Â·¿Ú³µÕ¾³ö·¢£¬µÚÒ»´Î´©Ô½²ËÔ°°Ó³¤½­´óÇÅ£¬µ½´ïÄÏ°¶¶þÌÁÕ¾£¬±êÖ¾×Å3ºÅÏ߶þÌÁÖÁ½­±±»ú³¡¶Î39kmÓÐÍû½ñÄêÄêµ×ʵÏÖÈ«Ïß¡°ÊÔÔËÓª¡±£®ÈçͼËùʾ£®ÒÑÖªÁ½Â·¿ÚÖÁ¶þÌÁ¶ÎÈ«³¤Ô¼8.8km£¬ÔËÐÐʱ¼äԼΪ18min£®Çó£º
£¨1£©Á½Â·¿ÚÖÁ¶þÌÁÇá¹ìÁгµÈ«³ÌÐÐÊ»µÄƽ¾ùËÙ¶ÈÊǶàÉÙkm/h£¿ºÏ¶àÉÙm/s£¿£¨¼ÆËã½á¹û±£ÁôСÊýµãºóÁ½Î»Êý×Ö£©
£¨2£©Èô°´ÕâÑùµÄËÙ¶ÈÐÐÊ»£¬Áгµ´Ó¶þÌÁ¿ªÍù½­±±»ú³¡´óÔ¼ÐèÒª¶àÉÙʱ¼ä£¿
·ÖÎö£º£¨1£©ÒÑÖªÁ½Â·¿ÚÖÁ¶þÌÁ¶ÎÈ«³¤ºÍÇá¹ìÁгµÔËÐÐʱ¼ä£¬ÀûÓÃËٶȹ«Ê½ÇóÇá¹ìÁгµÈ«³ÌÐÐÊ»µÄƽ¾ùËٶȣ»
£¨2£©ÓÖÖªµÀ¶þÌÁÖÁ½­±±»ú³¡µÄ¾àÀ룬ÀûÓÃt=
s
v
ÇóÁгµ´Ó¶þÌÁ¿ªÍù½­±±»ú³¡ÐèÒªµÄʱ¼ä£®
½â´ð£º½â£º
£¨1£©Çá¹ìÁгµÈ«³ÌÐÐÊ»µÄƽ¾ùËٶȣº
v=
s1
t1
=
8.8km
18
60
h
¡Ö29.33km/h¡Ö8.15m/s£»
£¨2£©¡ßv=
s
t
£¬
¡àÁгµ´Ó¶þÌÁ¿ªÍù½­±±»ú³¡ÐèÒªµÄʱ¼ä£º
t=
s
v
=
39km
29.33km/h
¡Ö1.33h£®
´ð£º£¨1£©Á½Â·¿ÚÖÁ¶þÌÁÇá¹ìÁгµÈ«³ÌÐÐÊ»µÄƽ¾ùËÙ¶ÈÊÇ29.33km/h£¬ºÏ8.15m/s£»
£¨2£©Èô°´ÕâÑùµÄËÙ¶ÈÐÐÊ»£¬Áгµ´Ó¶þÌÁ¿ªÍù½­±±»ú³¡´óÔ¼ÐèÒª1.33h£®
µãÆÀ£º±¾Ì⿼²éÁËѧÉú¶ÔËٶȹ«Ê½µÄÕÆÎÕºÍÔËÓã¬ÊôÓÚ»ù´¡ÌâÄ¿£®¼ÆËãʱעÒⵥλ»»Ë㣺1m/s=3.6km/h£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
ÊÜ2011Äê3ÔÂ11ÈÕµÄÈÕ±¾9.0¼¶´óµØÕðÓ°Ï죬¸Ã¹úÁ½×ùºËµçÕ¾µÄ5¸ö»ú×éͣת£¬2011Äê3ÔÂ12ÈÕÊ×´ÎÈ·Èϸ£µººËµçÕ¾³öÏÖй©£¬´óÅú¾ÓÃñ±»ÊèÉ¢£®2011Äê4ÔÂ12ÈÕÈÕ±¾Õþ¸®°Ñ±¾´ÎºËʹÊÌá¸ßµ½×î¸ß¼¶--7¼¶£®ÊÜ´ËÍ»·¢Ê¹ÊÓ°Ï죬ºËµçÕ¾µÄ°²È«ÎÊÌâÔٴθøÈËÃÇÇÃÏìÁ˾¯ÖÓ£®¶øÇáºËµÄ¾Û±äÊÇÔÚÉÏÒڶȵĸßÎÂÌõ¼þÏ£¬ÀûÓÃÇâµÄͬλËØ뮡¢ë°¿ØÇé¿öÏ·¢ÉúµÄºË¾Û±ä£¬¾Û±ä·´Ó¦ÖÐÊͷųöÀ´µÄºËÄÜÒ²ÄÜÌṩ´óÁ¿µÄÈÈÄÜ£¬²¢ÇҾ۱䷴ӦµÄÉú³ÉÎïÊÇÎÞ·ÅÉäÐÔÎÛȾµÄº¤£®ÀûÓÃÇáºË¾Û±äÔ­Àí½¨ÔìµÄºËµçÕ¾ÒԺ󽫻áͶÈëʹÓã®ÒÑÖª1Lº£Ë®ÖÐÌáÈ¡µÄÇâͬλËØ£¬ÔÚÍêÈ«¾Û±ä·´Ó¦ÖÐÊͷųöµÄÄÜÁ¿Ï൱ÓÚ400kgµÄúÍêȫȼÉÕËù·Å³öµÄÈÈÁ¿£¬Çó£º
£¨1£©400kgµÄúÍêȫȼÉÕÄÜÊͷųö¶àÉÙÈÈÁ¿£¿£¨ÃºµÄÈÈÖµq=3¡Á107J/kg£©
£¨2£©ÒÑÖª´Óº£Ë®ÖÐÌáÈ¡µÄÇâͬλËØÔÚ¾Û±äʱ²úÉúµÄÈÈÁ¿×ª»¯ÎªµçÄÜ£¬ÆäЧÂÊÊÇ100%£®Èô´Ó1Lº£Ë®ÖÐÌáÈ¡µÄÇâͬλËØÔÚÍêÈ«¾Û±äʱ²úÉúµÄÈÈÁ¿×ª»¯ÎªµçÄÜ£¬¿ÉÒÔ¹©Ò»Ì¨¹¦ÂÊΪ2kWµÄ¿Õµ÷Æ÷Õý³£¹¤×÷¶à³¤Ê±¼ä£¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø