ÈçͼËùʾ£¬¹â»¬»¡ÐιìµÀ϶ËÓëˮƽ´«ËÍ´øÎǽӣ¬¹ìµÀÉϵÄAµãµ½´«ËÍ´øµÄÊúÖ±¾àÀë¼°´«ËÍ´øµ½µØÃæµÄ¾àÀë¾ùΪh=5m£¬°ÑÒ»ÎïÌå×ÔAµãÓɾ²Ö¹ÊÍ·Å£¬ÎïÌåÓë´«ËÍ´ø¼äµÄ¶¯Ä¦²ÁÒòÊý¡£ÏÈÈô«ËÍ´ø²»×ª¶¯£¬ÎïÌ廬ÉÏ´«ËÍ´øºó£¬´ÓÓÒ¶ËBˮƽ·ÉÀ룬ÂäÔÚµØÃæÉϵÄPµã£¬B¡¢P¼äµÄˮƽ¾àÀëOPΪx=2m£»È»ºóÈô«ËÍ´ø˳ʱÕë·½Ïòת¶¯£¬ËٶȴóСΪv=5m/s¡£g=10m/s²¡£Çó£º
£¨1£©´«ËÍ´øת¶¯Ê±£¬ÎïÌåÂäµ½ºÎ´¦£¿
£¨2£©ÏȺóÁ½ÖÖÇé¿öÏ£¬´«ËÍ´ø¶ÔÎïÌåËù×ö¹¦Ö®±È£®
£¨3£©Á½ÖÖÇé¿öÏ£¬ÎïÌåÔ˶¯ËùÓÃʱ¼äÖ®²î£®

£¨1£©5m £¨2£©32/25  (3)0.45s

£¨1£©ÎïÌå¸Õ½øÈë´«ËÍ´ø£º
ÓÉ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
À뿪B×öƽÅ×Ô˶¯ÓÃʱt₁,ÓÉ
½âµÃt₁=1s£¬µ½B¶ËËٶȡ­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
´«ËÍ´øת¶¯Ê±£¬ÒòΪÎïÌåÏȼõËÙºóÔÈËÙ£¬
ÓÉ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
£¨2£©µÚÒ»´Î´«ËÍ´ø¶ÔÎïÌå×öµÄ¹¦£º¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
µÚ¶þ´Î´«ËÍ´ø¶ÔÎïÌåµÄ¹¦£º¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
Á½´Î×ö¹¦´óС֮±ÈΪ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
£¨3£©ÎïÌåËÙ¶ÈÓÉ10m/s¼õСÓÚ5m/sµÄ¹ý³Ì£¬Á½´ÎÓÃʱÏàͬ.
´«ËÍ´ø¾²Ö¹Ê±£¬ÎïÌåÓÉ5m/s¼õСµ½2m/sÓÃʱ=1.5s¡­¡­¡­¡­¡­¡­£¨2·Ö£©
tʱ¼äÄÚ£¬ÎïÌåÇ°ÐС­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
´«ËÍ´øת¶¯Ê±£¬ÎïÌåÇ°ÐÐLÓÃʱ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©
¹ÊµÚ¶þ´Î±ÈµÚÒ»´ÎÉÙÓÃʱ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©