ÌâÄ¿ÄÚÈÝ
ijÍøÕ¾±¨µÀ£º×î½ü¶«ÑÇij¹ú
·¢ÉäÁËÒ»¿ÅÈËÔì»·ÔÂÎÀÐÇ£¬ÎÀÐÇÖÊÁ¿100 kg£¬
»·ÈÆÖÜÆÚ2 h¡¡
һλͬѧÏëÀûÓÃËùѧµÄÎïÀí֪ʶ¶Ô´ËÐÂÎŵÄÕæʵ
ÐÔ½øÐкËʵ.µ«Ëû¼Ç²»ÇåÒýÁ¦ºãÁ¿µÄÊýÖµÇÒÊÖ±ßû
ÓпɲéÕÒµÄ×ÊÁÏ£¬Ö»¼ÇµÃÒ»¿ÆÆÕ²ÄÁÏÉϽéÉܵÄÔÂÇò°ë¾¶Ô¼ÎªµØÇò°ë¾¶µÄ£¬ÔÂÇò±íÃæÖØÁ¦¼ÓËÙ¶ÈԼΪµØÇò±íÃæµÄ1/6.ͬʱËû¼ÇÆð£¬ÎïÀí½Ì²ÄÖнéÉܵĵØÇò°ë¾¶Îª6400 km£¬µØÇò±íÃæµÄÖØÁ¦¼ÓËٶȿÉȡΪ10 m/s2.Ëû×¼±¸ÀûÓÃÉÏÊöÊý¾Ý¶Ô¸ÃÍøÉÏÐÂÎŽøÐкËʵ.?
ÏÖÇëÄãÒ²¸ù¾ÝÉÏÊöÊý¾Ý£¬ÔËÓÃÎïÀíѧ֪ʶ½øÐÐÍƵ¼·ÖÎöºó˵Ã÷ÄÜ·ñÈ϶¨ÕâÊÇÒ»Ìõ¼ÙÐÂÎÅ£¿
ÉèÔÂÇòÖÊÁ¿ÎªM£¬°ë¾¶Îªr0,ÎÀÐǵÄÖÊÁ¿Îªm£¬»·ÈÆÖÜÆÚΪT£¬°ë¾¶Îªr.?
ÓÐ G (2·Ö)? µÃ T=2¦Ð (1) (2·Ö)?
ÔÚÔÂÇò±íÃæÓÐ?G £¨2·Ö£©
´úÈ루1£©Ê½µÃ T=2¦Ð (2) (1·Ö)?
ÓÉ£¨2£©Ê½¿ÉÖª£¬ÎÀÐǹìµÀ°ë¾¶rԽС£¬ÖÜÆÚTÔòÔ½¶Ì£¬È¡r=r0?
ÖÜÆÚÓÐ×îСֵTmin? (1·Ö)?Tmin=2¦Ð (3) (2·Ö)?
¾ÝÌâÒ⣬rµØ=4r0,gµØ=6gÔ ´úÈ루3£©Ê½µÃ:Tmin=2¦Ð=6000 s¡Ö1.7 h (3·Ö)?
¿ÉÖª£¬»·ÈÆÔÂÇò×öÔÈËÙÔ²ÖÜÔ˶¯µÄÎÀÐǵÄÔËÐÐÖÜÆÚ´óÓÚµÈÓÚ1.7 h£¬¶øÍøÕ¾ÐÂÎÅËù˵µÄ»·ÔÂÎÀÐǵÄÖÜÆÚΪ2 h£¬¹Ê¾Ý´ËÎÞ·¨È϶¨ÕâÌõÐÂÎŵÄÕæ¼Ù.(1·Ö)?
¡¾½âÎö¡¿ÂÔ