Question

£¨16·Ö£©±ùºø±ÈÈüÊÇÔÚˮƽ±ùÃæÉϽøÐеÄÌåÓýÏîÄ¿£¬±ÈÈü³¡µØʾÒâÈçͼËùʾ£¬±ÈÈüʱ£¬Ô˶¯Ô±ÔÚͶÖÀÏßAB ´¦ÈñùºøÒÔv₀=2m/sµÄ³õËÙ¶ÈÏòÔ²ÀÝÔ²ÐÄOµã»¬³ö£¬ÒÑÖªÔ²ÀÝÔ²ÐÄOµ½ABÏߵľàÀëΪ30m£¬±ùºøÓë±ùÃæ¼äµÄ¶¯Ä¦²ÁÒòÊýΪ£¨gÈ¡£©

   £¨1£©Èç¹ûÔÚÔ²ÀÝÔ²ÐÄOÓжԷ½µÄ±ùºø£¬ÎªÁ˽«¶Ô·½±ùºøײ¿ª£¬Ô˶¯Ô±¿ÉÒÔÓÃëˢ²Á±ùºøÔËÐÐÇ°·½µÄ±ùÃ棬ʹ±ùºøÓë±ùÃæ¼äµÄ¶¯Ä¦²ÁÁ¦ÒòÊý¼õС£¬ÈôÓÃëˢ²Á±ùÃæºó¶¯Ä¦²ÁÒòÊý¼õÉÙÖÁ£¬ÔòÔ˶¯Ô±ÓÃëˢ²Á±ùÃæµÄ³¤¶ÈÓ¦´óÓÚ¶àÉÙÃ×£¿

   £¨2£©ÈôÔ˶¯Ô±²ÉÓòÁË¢±ùÃæµÄ·½Ê½Ê¹±ùºø¸ÕºÃÔ˶¯µ½Ô²ÀÝÔ²ÐÄOµã´¦£¬ÄÇô±ùºøÔ˶¯µÄ×î¶Ìʱ¼äÊǶàÉÙ£¿

Answer 1

£¨1£©É軬ÖÁOµãËÙ¶ÈΪÁ㣬Óɶ¯Äܶ¨Àí

                                              ¡­¡­¡­¡­4·Ö

½âµÃ                                                                          ¡­¡­¡­¡­3·Ö

Ô˶¯Ô±Ë¢±ùÃæµÄ¾àÀëÓ¦´óÓÚ10m            

   £¨2£©ÓÉ£¨1£©¼ÆËã¿ÉÖª£¬ÔÚ±ùÃæÉÏË¢10mʱ£¬±ùºøµ½´ïO´¦Ê±ËÙ¶ÈΪ0

ÔÚ¿ªÊ¼Ë¢±ùÃæ10mʱ£¬±ùºøµ½´ïO´¦Ô˶¯Ê±¼ä×î¶Ì

Ë¢¹ýºóµÄ¼ÓËÙ¶ÈΪ                        ¡­¡­¡­¡­1·Ö

                                                                       ¡­¡­¡­¡­1·Ö

½âµÃ                                                          ¡­¡­¡­¡­2·Ö

Ô˶¯d=10mºóÊ£Óà20m¾àÀëÒÔa₁×öÔȼõËÙÔ˶¯

                                                             ¡­¡­¡­¡­1·Ö

                                                                             ¡­¡­¡­¡­1·Ö

                                                                             ¡­¡­¡­¡­1·Ö

Ôò±ùºøÔ˶¯×î¶Ìʱ¼äΪs¡£                        ¡­¡­¡­¡­2·Ö