ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ä³ÄêijÔ£¬ÎÒ¹úÈý´ó½¢¶ÓÆ븰ÄϺ£¾ÙÐдó¹æÄ£¾üÊÂÑÝÏ°£»¸÷ÖÖÏȽøÉ豸Ïà¼ÌÁÁÏ࣬ÆäÖеġ°·É±ª¡±×÷Õ½°ë¾¶¿É´ï1 500 km£¬¼ÙÉèÒ»¼Ü¼ß15Õ½¶·»úÓÚ5ÔÂ20ÈÕ8µãÕû´Ó¡°ÁÉÄþ¡±ºÅº½Ä¸Æð·É£¬ÔÚ8µã18·ÖÕýºÃµÖ´ï¾àº½Ä¸680 kmµÄÖ¸¶¨Î»Öã¬Õ½¶·»úÒDZíÏÔʾ´Ë¶ÎÐгÌÕýºÃΪ800 km¡£
£¨1£©Õ½¶·»ú´Ë¶Î¹ý³ÌµÄƽ¾ùËÙÂʺͷÉÐÐ100 mÔ¼ÐèµÄʱ¼ä·Ö±ðÊǶàÉÙ£¿
£¨2£©´Ë¶Î¹ý³ÌÖÐÕ½¶·»úµÄƽ¾ùËٶȴóСÓÖÊǶàÉÙ£¿
¡¾´ð°¸¡¿£¨1£©741 m/s 0.135 s £¨2£©630 m/s
¡¾½âÎö¡¿£¨1£©ÓÉÌâ¿ÉÖª£¬·É»ú·ÉÐеÄʱ¼äÊÇ18 min=1 080 s
´Ë¶Î·³ÌÕýºÃΪ800 km£¬ËùÒÔƽ¾ùËÙÂÊ
·ÉÐÐ100 mµÄʱ¼ä
£¨2£©Î»ÒÆx=680 km£¬ËùÒÔƽ¾ùËÙ¶È
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿