ÌâÄ¿ÄÚÈÝ

Ò»Áг¤200Ã׵Ļ𳵣¬ÔÈËÙͨ¹ýÒ»×ù6700Ã×µÄËíµÀ£¬ÓÃÁË6.9·ÖÖÓ£¬Îʴ˻𳵾­¹ýËíµÀʱµÄËÙ¶ÈΪ¶à´ó£¿±¬ÆÆÐèÒªÒý»ðÏߣ¬Ä³Òý»ðÏßȼÉÕµÄËÙ¶ÈΪ0.8ÀåÃ×/Ã룬ÈôÈËÔÚµãȼÒý»ðÏߺóÁ¢¼´ÒÔ5Ã×/ÃëµÄËÙ¶ÈѸËÙÅܵ½600Ã×ÒÔÍâµÄ°²È«Çø£¬ÎÊÑ¡ÓõÄÒý»ðÏßÖÁÉÙÓ¦¶à³¤£¿Ò»Á¾Æû³µÒÔ36ǧÃ×/СʱµÄËÙ¶ÈÐÐÊ»µ½¾àÒ»ÐüѾø±Ú875Ã×´¦Ê±°´ÁËÒ»ÉùÀ®°È£¬ÉùÒôÒÔ340Ã×/ÃëÏòÇ°´«²¥£¬Óöµ½¾ø±ÚºóÓÖ·´Éä»ØÀ´£¬ÎÊ£ºÔÚÐÐÊ»µÄÆû³µÀ¼ÝʻԱҪ¾­¹ý¼¸ÃëÖÓ²ÅÌýµ½À®°ÈÏìµÄ»ØÉù£¿

½â£º£¨1£©»ð³µµÄ·³Ìs=L»ð³µ+LËíµÀ=200m+6700m=6900m£¬»ð³µµÄÔ˶¯Ê±¼ät=6.9min=414s£¬
»ð³µµÄËÙ¶ÈV==¡Ö16.67m/s£®
£¨2£©ÈËÅܵ½°²È«ÇøÐèÒªµÄʱ¼ät===120s£¬Òý»ðÏߵij¤¶ÈL=Vµ¼»ðÏßt=0.8cm/s¡Á120s=96cm£®
£¨3£©Æû³µµÄËÙ¶ÈV³µ=36km/h=10m/s£¬ÉùÒô´«µ½¾ø±ÚµÄʱ¼ät1==¡Ö2.57s£»
ÔÚ´Ëʱ¼äÄÚÆû³µÇ°½øµÄ¾àÀës1=V³µt1=10m/s¡Á2.57s=25.7m£¬´Ëʱ³µµ½¾ø±ÚµÄ¾àÀës2=s-s1=875m-25.7m=849.3m£»
ÒÔ³µÎª²ÎÕÕÎÉùÒôÏà¶ÔÓÚ³µµÄËÙ¶ÈV'=V+VÉù=340m/s+10m/s=350m/s£¬ÉùÒô´«µ½³µµÄʱ¼ät2===¡Ö2.43s£¬
¼ÝʻԱÌýµ½»ØÉùµÄʱ¼ät=t1+t2=2.57s+2.43s=5s£®
´ð£º£¨1£©»ð³µ¾­¹ýËíµÀʱµÄËÙ¶ÈÊÇ16.67m/s£»£¨2£©Òý»ðÏß³¤¶ÈÖÁÉÙΪ96cm£»£¨3£©¼ÝʻԱҪ¾­¹ý5s²ÅÌýµ½À®°ÈÏìµÄ»ØÉù£®
·ÖÎö£º£¨1£©»ð³µ¾­¹ýËíµÀʱµÄ·³ÌÊǵÈÓڻ𳵳¤L»ð³µÓëËíµÀ³¤LËíµÀÖ®ºÍ£¬È»ºóÓÉËٶȹ«Ê½Çó»ð³µµÄËٶȣ®
£¨2£©ÏÈÓÉ·³Ì¹«Ê½Çó³öÈËÅܵ½°²È«ÇøËùÓÃʱ¼ät£¬È»ºóÔÙÓÉ·³Ì¹«Ê½ÇóÒý»ðÏߵij¤¶ÈL£®
£¨3£©Çó³öÉùÒô´«µ½¾ø±ÚµÄʱ¼ät1£¬È»ºóÇó³öÔÚ´Ëʱ¼äÄÚÆû³µÇ°½øµÄ¾àÀës1£¬³µµ½¾ø±ÚµÄ¾àÀës2£¬ÔÙÇóÉùÒôÏà¶ÔÓÚ³µµÄ´«²¥ËÙ¶ÈV'£¬ÉùÒô´«µ½³µËùÓÃʱ¼ät2£¬×îºóÇó³öÌýµ½»ØÉùµÄʱ¼ät=t1+t2£®
µãÆÀ£º±¾Ì⿼²éÁË£ºÂ·³Ì¹«Ê½µÄÓ¦Ó㬽âÌâµÄ¹Ø¼üÊÇ£º1¡¢×¼È·Çó³ö»ð³µµÄ·³Ì£»2¡¢ÖªµÀµ¼»ðÏßµÄȼÉÕʱ¼äÓëÈ˵ÄÔ˶¯Ê±¼äÏàµÈ£»3¡¢Ó¦ÖªµÀÔÚÉùÒô´«²¥¡¢·´ÉäµÄ¹ý³ÌÖÐÆû³µ¼ÌÐøÏòÇ°Ô˶¯£¬Ìýµ½»ØÉùʱ£¬ÉùÒôµÄ·³Ì²»ÊÇ2¡Á875m=1750m£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø