ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÎÒ¹úÑÐÖƵĴó¿Í»úC919´îÔØijÎÐÂÖÅçÆø·¢¶¯»ú£¬ÆäÈÈЧÂʺÍÍƽøЧÂʱÈÒ»°ã¿Í»ú¸ß£¬ËùνÈÈЧÂÊÊÇÖ¸·¢¶¯»ú»ñµÃµÄ»úеÄÜÓëȼÁÏÍêȫȼÉÕ²úÉúµÄÄÚÄÜÖ®±È£¬¶øÍƽøЧÂÊÔòÊÇÖ¸·¢¶¯»ú¶Ô·É»úµÄÍÆÁ¦Ëù×öµÄ¹¦Óë·¢¶¯»ú»ñµÃµÄ»úеÄÜÖ®±È¡£
(1)·É»ú·ÉÐÐʱËùÊÜ×èÁ¦fÓëÔËÐÐËÙ¶ÈvµÄ¹ØϵÈç±í£¬ÔòËüÃÇÖ®¼äµÄÊýÁ¿¹Øϵ£ºf=_________£»
(2)Èô·É»úÒÔ200 m/sµÄˮƽËÙ¶ÈÔÈËÙѲº½0.5 h¹ý³ÌÖУ¬ÏûºÄȼÓÍ1080 kg£¬Ôò´Ë¹ý³Ì£¬·É»ú¿Ë·þ×èÁ¦Ëù×öµÄ¹¦Îª_________ J£»Èô·¢¶¯»úµÄÈÈЧÂÊΪ40%£¬Ôò·¢¶¯»úµÄÍƽøЧÂÊΪ_________¡££¨È¼ÓÍÈÈÖµq=5.0¡Á107 J/ kg£©
¡¾´ð°¸¡¿f=£¨£©2¡Á0.9¡Á104 N 1. 296¡Á1010 60%
¡¾½âÎö¡¿
£¨1£©µ±v=100m/sʱ£¬£»
µ±v=200m/sʱ£¬£»
¡¡
¿ÉµÃ ·É»ú·ÉÐÐʱËùÊÜ×èÁ¦fÓëÔËÐÐËÙ¶ÈvµÄ¹Øϵ£º£»
£¨2£©·É»úˮƽÔÈËÙѲº½Ê±£¬´¦ÓÚƽºâ״̬£¬Êܵ½Æ½ºâÁ¦µÄ×÷Ó㬷¢¶¯»úѲº½ÍÆÁ¦ÓëÊܵ½µÄ×èÁ¦Æ½ºâ£¬´óСÏàµÈ£¬Ôò£ºF=f=3.6¡Á104N£»
Ѳº½µÄ¾àÀëΪ£º£¬
ÍÆÁ¦Ëù×öµÄ¹¦£¬¼´·É»ú¿Ë·þ×èÁ¦Ëù×öµÄ¹¦£º
£¬
ȼÁÏÍêȫȼÉշųöµÄÈÈÁ¿£º
£»
¸ù¾ÝµÃ£¬·¢¶¯»ú»ñµÃµÄ»úеÄÜ£º
£»
·¢¶¯»úµÄÍƽøЧÂÊ£º
![](http://thumb2018.1010pic.com/images/loading.gif)