ÌâÄ¿ÄÚÈÝ
ÖÊÁ¿Îª0.5kgµÄСÎï¿é·ÅÔÚˮƽµØÃæÉϵÄAµã£¬¾àÀëAµã5mµÄλÖÃB´¦ÊÇÒ»Ãæǽ£¬ÈçͼËùʾ£¬Îï¿éÒÔv0=9m/sµÄ³õËٶȴÓAµãÑØAB·½ÏòÔ˶¯£¬ÔÚÓëǽ±ÚÅöײǰ˲¼äµÄËÙ¶ÈΪ7m/s£¬ÅöºóÒÔ6m/sµÄËٶȷ´ÏòÔ˶¯Ö±ÖÁ¾²Ö¹£®Åöײʱ¼äΪ0.05s£¬gÈ¡10m/s2£®
A. Îï¿éÓëµØÃæ¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì = 0.12
B. ǽÃæ¶ÔÎï¿éƽ¾ù×÷ÓÃÁ¦µÄ´óС10 N
C. Îï¿éÔÚ·´ÏòÔ˶¯¹ý³ÌÖп˷þĦ²ÁÁ¦Ëù×öµÄ¹¦Îª9J
D. ÅöײºóÎï¿é»¹ÄÜÏò×óÔ˶¯µÄʱ¼äΪ2s
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿