1£®Öʵã×öÖ±ÏßÔ˶¯µÄv£­tͼÏóÈçͼ1£­3£­1Ëùʾ£¬¹æ¶¨ÏòÓÒΪÕý·½Ïò£¬Ôò¸ÃÖʵãÔÚÇ°8 sÄÚƽ¾ùËٶȵĴóСºÍ·½Ïò·Ö±ðΪ                                      (¡¡¡¡)£®

ͼ1£­3£­1

A£®0.25 m/s¡¡ÏòÓÒ                     B£®0.25 m/s¡¡Ïò×ó

C£®1 m/s¡¡ÏòÓÒ                         D£®1 m/s¡¡Ïò×ó

½âÎö¡¡ÓÉͼÏóÃæ»ý¼ÆËã0¡«3 sÄÚÖʵãµÄλÒÆ´óСΪx₁£½2×3× m£½3 m£¬·½ÏòÏòÓÒ£¬3¡«

8 sÄÚλÒÆ´óСΪx₂£½2×5× m£½5 m£¬·½ÏòÏò×ó£¬ËùÒÔÇ°8 s×ÜλÒÆx£½x₁£­x₂£½£­2 m.  

£½£½ m/s£½£­0.25 m/s£¬¼´´óСΪ0.25 m/s£¬·½ÏòÏò×ó£®BÕýÈ·£®

´ð°¸¡¡B