ÌâÄ¿ÄÚÈÝ
Æû³µÊÔ³µ³¡ÖÐÓÐÒ»¸ö¼ì²âÆû³µÔÚ¼«ÏÞ״̬ϵijµËÙµÄÊÔ³µµÀ,ÊÔ³µµÀ³Ê׶Ã棨©¶·×´£©,ÈçͼËùʾ¡£ ²âÊÔµÄÆû³µÖÊÁ¿m="1" t,³µµÀתÍä°ë¾¶R=150m,·ÃæÇãб½Ç¦È=45¡ã,·ÃæÓ복̥µÄ¶¯Ä¦²ÁÒòÊý¦ÌΪ0.25£¬Éè·ÃæÓ복̥µÄ×î´ó¾²Ä¦²ÁÁ¦µÈÓÚ»¬¶¯Ä¦²ÁÁ¦£¬ (gÈ¡10 m/s2)
Çó£¨1£©ÈôÆû³µÇ¡ºÃ²»ÊÜ·ÃæĦ²ÁÁ¦£¬ÔòÆäËÙ¶ÈӦΪ¶à´ó£¿
£¨2£©Æû³µÔڸóµµÀÉÏËùÄÜÔÊÐíµÄ×îС³µËÙ.
1£©38.7m/s£¨2£©30m/s
½âÎö
±¾ÌâÊôÓÚÔÈËÙÔ²ÖÜÔ˶¯µÄÎÊÌâ¡£¹Ø¼üÊÇ·ÖÎöÊÜÁ¦£¬ÕÒ³öÌṩÏòÐÄÁ¦µÄÁ¦£¬½áºÏÅ£¶ÙµÚ¶þ¶¨ÂɺÍÔÈËÙÔ²ÖÜÔ˶¯µÄ¹æÂɱã¿É½â³ö´ËÌâ¡£

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿