ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿µØÇòͬ²½ÎÀÐǵ½µØÐĵľàÀër¿ÉÓÉr3=Çó³ö.ÒÑ֪ʽÖÐaµÄµ¥Î»ÊÇm£¬bµÄµ¥Î»ÊÇs£¬cµÄµ¥Î»ÊÇm/s2£¬Ôò £¨ £©
A. aÊǵØÇò°ë¾¶£¬bÊǵØÇò×ÔתµÄÖÜÆÚ£¬cÊǵØÇò±íÃæ´¦µÄÖØÁ¦¼ÓËÙ¶È
B. aÊǵØÇò°ë¾¶£¬bÊÇͬ²½ÎÀÐÇÈƵØÐÄÔ˶¯µÄÖÜÆÚ£¬cÊÇͬ²½ÎÀÐǵļÓËÙ¶È
C. aÊdzàµÀÖܳ¤£¬bÊǵØÇò×ÔתµÄÖÜÆÚ£¬cÊÇͬ²½ÎÀÐǵļÓËÙ¶È
D. aÊǵØÇò°ë¾¶£¬bÊÇͬ²½ÎÀÐÇÈƵØÐÄÔ˶¯µÄÖÜÆÚ£¬cÊǵØÇò±íÃæ´¦µÄÖØÁ¦¼ÓËÙ¶È
¡¾´ð°¸¡¿AD
¡¾½âÎö¡¿ÎÀÐǵĶ¯Á¦Ñ§·½³Ì£¬ÒýÁ¦µÄ±í´ïʽÓÐFÒý=G
»ò
µÄ±í´ïʽ¿ÉÓÉÎÀÐǵÄÔ˶¯²ÎÊýv¡¢T¡¢¦Ø¡¢f¡¢nµÈ±íʾ£¬ÌâÄ¿Ìõ¼þ¡°aµÄµ¥Î»ÊÇm£¬bµÄµ¥Î»ÊÇs,cµÄµ¥Î»ÊÇm/s2¡± £¬ÎÒÃÇ°´Ê¹ÓõÄƵÂÊ£¬ÕâÈý¸öÁ¿¿ÉÄÜÊǵØÇò°ë¾¶R¡¢Í¬²½ÎÀÐǵÄÖÜÆÚT¡¢µØÇò±íÃæ´¦µÄÖØÁ¦¼ÓËÙ¶Èg.ÓÉG
=m
rµÃr3=
ÓÉmg=G
µÃGM=gR2ÓÉ¢Ù¢ÚÁªÁ¢µÃr3=
£¬ËùÒÔ±¾Ìâ´ð°¸ÊÇA¡¢D
˼··ÖÎö£º¸ù¾ÝÍòÓÐÒýÁ¦FÒý=G»ò
±í´ïʽ¸ù¾Ýµ¥Î»»»Ëãµ¼³öADÕýÈ·¡£
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿