ÌâÄ¿ÄÚÈÝ

£¨11·Ö£©Èçͼ7Ëùʾ£¬ÖÊÁ¿Îª1.0KgµÄÎïÌåm1£¬ÒÔ5m/sµÄËÙ¶ÈÔÚˮƽ×ÀÃæÉÏAB²¿·ÖµÄ×ó²àÏòÓÒÔ˶¯£¬×ÀÃæAB²¿·ÖÓëm1¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì=0.2£¬AB¼äµÄ¾àÀës=2.25m£¬×ÀÃæÆäËû²¿·Ö¹â»¬¡£m1»¬µ½×À±ß´¦ÓëÖÊÁ¿Îª2.5KgµÄ¾²Ö¹ÎïÌåm2·¢ÉúÕýÅö£¬Åöײºóm2ÔÚÊúÖ±·½ÏòÉÏÂäÏÂ0.6mʱËٶȴóСΪ4m/s£¬ÈôgÈ¡10m/s2£¬ÎÊ£º
£¨1£©Åöײǰm1µÄËÙ¶ÈΪ¶à´ó£¿
£¨2£©Åöײºóm2¡¢m1ËٶȷֱðΪ¶à´ó£¿
£¨3£©Åöºóm1×îÖÕÊÇ·ñ»áÍ£Ö¹Ô˶¯£¿Èç¹û»á,×îºóÍ£ÔÚʲôλÖÃ? Èç¹û²»»á,×îÖÕ×öʲôÔ˶¯£¿

£¨1£©4m/s
£¨2£©1m/s£¬2m/s
£¨3£©Åöײºóm1»áÍ£Ö¹Ô˶¯, Í£ÔÚBµã×ó±ß0.25m´¦

½âÎö£¨1£©¶Ôm1,´ÓAµ½Bµã£¬Óɶ¯Äܶ¨Àí£º
                         ¢Ù

¹ýÁËBµãºóm1×öÔÈËÙÔ˶¯£¬¼´Óëm2ÅöÇ°µÄËٶȴóСΪ4m/s
£¨2£©¶Ôm2,Åöºó×öƽÅ×Ô˶¯£¬ÓÉ»úеÄÜÊغ㣺

¢Ú

¼´Åöºóm2µÄËٶȴóСΪ2m/s¡£
¶Ôm1,m2¹¹³ÉµÄϵͳ£¬Åöײǰºó¶¯Á¿Êغ㣬ȡÏòÓÒΪÕý·½Ïò£¬
¢Û
¼´Åöײºóm1ËٶȴóСΪ1m/s,¸ººÅ±íʾÏò×óÔ˶¯
£¨3£©¶Ôm1ÔËÓö¯Äܶ¨ÂÉ£»
                                    ¢Ü

ÒòΪs0<2.25m, ¼´Åöײºóm1»áÍ£Ö¹Ô˶¯, Í£ÔÚBµã×ó±ß0.25m´¦.

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø