ÌâÄ¿ÄÚÈÝ
Ò»Áмòгºá²¨ÑØÖ±Ïß´«²¥£¬ÔÚ²¨µÄ´«²¥·½ÏòÉÏÓÐP¡¢QÁ½¸öÖʵ㣬ËüÃÇÏà¾à0.8m£®µ±t=0ʱ£¬P¡¢QÁ½µãλÒÆÇ¡ºÃ¶¼ÊÇÕýµÄ×î´óÖµ£¬ÇÒP¡¢Q¼äÖ»ÓÐÒ»¸ö²¨¹È£®µ±t=0.6 sʱ£¬P¡¢QÁ½µãÕýºÃ¶¼´¦ÓÚƽºâλÖã¬ÇÒP¡¢QÁ½µã¼äÓÐÒ»¸ö²¨·åºÍÒ»¸ö²¨¹È£¬ÇÒ²¨·å¾àQµã¾àÀëµÚÒ»´Î0.2m£¬ÊÔÇó£º|
(1)Èô²¨ÓÉP´«µ½Q£¬²¨µÄÖÜÆÚ£»
(2)Èô²¨ÓÉQ´«µ½P£¬²¨µÄËٶȣ»
(3)Èô²¨ÓÉQ´«µ½P£¬´Ót=0ʱ¿ªÊ¼¹Û²ì£¬ÄÄЩʱ¿ÌP¡¢Q¼ä(P¡¢Q³ýÍâ)Ö»ÓÐÒ»¸öÖʵãλÒƵÈÓÚÕñ·ù£®
£¨1£©T=0.8s£¨2£©£¨3£© £¨n=O£¬1£¬2£¬¡¡£©
½âÎö:
ÓÉÌâÒâ
(1) t£½0.6s£½ ½âµÃT=0.8s
(2) t£½0.6s£½½âµÃT=2.4 s
²¨ËÙ
(3)Èô²¨ÓÉQ´«ÖÁP£¬ÔòT=2.4 s£¬´Ót=0ʱ¿Ì¿ªÊ¼£¬Ã¿¾¹ý°ë¸öÖÜÆÚ£¬P¡¢Q¼äÖ»ÓÐÒ»¸öÖʵãµÄλÒƵÈÓÚÕñ·ù£¬¼´ ʽÖÐn=O£¬1£¬2£¬¡¡
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿