ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿¶¬ÌìÏÂÑ©ºó»§Íâ·ÅÖõÄÆû³µ¶¥ÉÏ»áÁôϺñºñµÄ»ýÑ©£¬ÓÐһ˾»úÇåÀí»ýѩʱÔÚ³µ¶¥O´¦ÁôÏÂÒ»¿éÖÊÁ¿m=2kgµÄ»ýÑ©(¿ÉÊÓΪÖʵã)£¬ÒÑÖª³µ¶¥Ç°ºóA¡¢B¼ä¾àÀël=3m£¬»ýÑ©µ½A´¦¾àÀës=1m£¬ÈçͼËùʾ£¬gÈ¡10m/
(1)ÓÉÓÚ³µ¶¥Î¶Ƚϵͣ¬»ýÑ©Óë³µ¶¥¼äµÄ¶¯Ä¦²ÁÒòÊý=0.6£¬µ±Æû³µ´Ó¾²Ö¹¿ªÊ¼ÒÔ3m/¼ÓËÙ¶ÈÔ˶¯Ê±£¬Çó»ýÑ©Êܵ½µÄĦ²ÁÁ¦f¡£
(2)Èô˾»ú´ò¿ª¿Õµ÷ʹ³µÄÚζÈÉý¸ß£¬µ¼Ö»ýÑ©ÓëÆû³µ¼äµÄ¶¯Ä¦²ÁÒòÊý±äΪ=0.25£¬Æû³µÈÔÒÔ3m/¼ÓËÙ¶ÈÆô¶¯£¬Çó»ýÑ©»¬µ½A´¦ËùÓõÄʱ¼ät
(3)ÈôÆû³µ»ºÂýÆô¶¯£¬»ýÑ©ÓëÆû³µÎÞÏà¶Ô»¬¶¯£¬»ýÑ©Óë³µ¶¥¼äµÄ¶¯Ä¦²ÁÒòÊý=0.25£¬Æû³µÒÔ72km/hµÄËÙ¶ÈÔÈËÙÔ˶¯¡£ÓÉÓÚÇ°·½Í»·¢Ê¹ʣ¬Ë¾»úÒÔ5m/µÄ¼ÓËٶȿªÊ¼É²³µ£¬ÊÔͨ¹ý¼ÆËãÅжÏÔÚÆû³µËٶȽµÎª36km/hµÄ¹ý³ÌÖУ¬»ýÑ©»á²»»á»¬µ½B´¦Â䵽ǰµ²·ç²£Á§É϶ø·¢ÉúÊÓÏß×èµ²£¿
¡¾´ð°¸¡¿£¨1£©6N£¨2£©2s£¨3£©»á
¡¾½âÎö¡¿
£¨1£©¼ÙÉè»ýÑ©Ç¡ºÃ»¬¶¯Ê±£¬ÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉ¿ÉÖª´Ëʱ¼ÓËÙ¶ÈΪ
½âµÃ
ËùÒÔ´Ëʱ»ýÑ©Ïà¶ÔÓÚÆû³µ²¢Î´»¬¶¯£¬Ôò´ËʱµÄĦ²ÁÁ¦Îª
£¨2£©¼ÙÉè»ýÑ©Ç¡ºÃ»¬¶¯Ê±£¬ÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉ¿ÉÖª´Ëʱ¼ÓËÙ¶ÈΪ
½âµÃ
ËùÒÔ´Ëʱ»ýÑ©Ïà¶ÔÓÚÆû³µ·¢Éú»¬¶¯£¬»ýÑ©µÄλÒÆΪ
Æû³µµÄλÒÆΪ
ÓÉÌâÓÐ
ÁªÁ¢½âµÃ
£¨3£©Óɵ¥Î»»»Ëã¿ÉÖª£¬ £¬
ÔÚÆû³µËٶȴÓ72km/h½µÎª36km/hµÄʱ¼äΪ
Õâ¶Îʱ¼äÄÚÆû³µµÄλÒÆΪ
´Ëʱ»ýÑ©Ïà¶ÔÓÚÆû³µ·¢Éú»¬¶¯£¬»ýÑ©µÄλÒÆΪ
±È½Ï¿ÉÖª £¬Ôò»ýÑ©»á»¬µ½B´¦Â䵽ǰµ²·ç²£Á§É϶ø·¢ÉúÊÓÏß×èµ²¡£