ÌâÄ¿ÄÚÈÝ
£¨6 ·Ö£©ÔÚƽֱµÄ¹«Â·ÉÏ£¬Ò»Á¾Æû³µÕýÒÔ 25 m/s µÄËÙ¶ÈÔÈËÙÐÐÊ»£¬ËùÊÜ×èÁ¦Îª 5 10 3 N£®Òò Ç°·½³öÏÖʹʣ¬Ë¾»úÁ¢¼´É²³µ£¬Ö±µ½Æû³µÍ£Ï£¬ÒÑÖªÆû³µµÄÖÊÁ¿Îª 3 10 3 kg£¬É²³µÊ±Æû³µËùÊܵÄ×èÁ¦Îª1.5 10 4 N£¬Çó£º
£¨1£©ÔÈËÙÐÐʻʱÆû³µµÄÇ£Òý¹¦ÂÊ£»
£¨2£©´Ó¿ªÊ¼É²³µµ½×îÖÕͣϣ¬Æû³µÔ˶¯µÄʱ¼ä£»
£¨3£©´Ó¿ªÊ¼É²³µµ½ 5s Ä©£¬Æû³µÇ°½øµÄ¾àÀ룮£¨´Ó¿ªÊ¼É²³µ¿ªÊ¼¼Æʱ£©
£¨6·Ö£©
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿