ÌâÄ¿ÄÚÈÝ

Ò»Á¾Ð¡Æû³µÔÚÒ»¶ÎƽֱµÄ¹«Â·ÉÏ×öÔȼÓËÙÖ±ÏßÔ˶¯£¬A¡¢BÊÇÔ˶¯¹ý³ÌÖо­¹ýµÄÁ½µã¡£ÒÑÖªÆû³µ¾­¹ýAµãʱµÄËÙ¶ÈΪ1m/s£¬¾­¹ýBµãʱµÄËÙ¶ÈΪ7m/s¡£ÔòÆû³µ´ÓAµ½BµÄÔ˶¯¹ý³ÌÖУ¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨   £©
A£®Æû³µ¾­¹ýABλÒÆÖеãʱËÙ¶ÈÊÇ4m/s
B£®Æû³µ¾­¹ýABÖмäʱ¿ÌµÄËÙ¶ÈÊÇ4m/s
C£®Æû³µÇ°Ò»°ëʱ¼ä·¢ÉúλÒÆÊǺóÒ»°ëʱ¼ä·¢ÉúλÒƵÄÒ»°ë
D£®Æû³µÇ°Ò»°ëλÒÆËùÓÃʱ¼äÊǺóÒ»°ëλÒÆËùÓÃʱ¼äµÄ2±¶
BD

ÊÔÌâ·ÖÎö£ºÉèÖмäλÖõÄËÙ¶ÈΪv£¬Ôòv2?vA2£½2ax£¬vB2?v2£½2ax£¬ÁªÁ¢½âµÃ£¬¹ÊA´í£»Æû³µ¾­¹ýÖмäʱ¿ÌµÄËٶȣ¬¹ÊBÕýÈ·£»Ç°Ò»°ëʱ¼äÄÚƽ¾ùËٶȣ¬ºóÒ»°ëʱ¼äÄÚµÄƽ¾ùËÙ¶È,¸ù¾Ýx=vtÖª£¬Ç°Ò»°ëʱ¼äÄÚµÄλÒƲ»ÊÇ×îºóÒ»°ëʱ¼äλÒƵÄÒ»°ë£¬¹ÊC´í£»Ç°Ò»°ëλÒÆÄÚµÄƽ¾ùËٶȣ¬ºóÒ»°ëλÒÆÄÚµÄƽ¾ùËٶȣ¬¸ù¾Ýx=vtÖª£¬Æû³µÔÚÇ°Ò»°ëλÒÆËùÓõÄʱ¼äΪºóÒ»°ëλÒÆËùÓÃʱ¼äµÄÁ½±¶£¬¹ÊDÕýÈ·¡£
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø