ÌâÄ¿ÄÚÈÝ
£¨2011?ÉϺ£Ä£Ä⣩ÍòÓÐÒýÁ¦¶¨ÂɺͿâÂض¨Âɶ¼×ñÑƽ·½·´±ÈÂÉ£¬ÔÚ´¦ÀíÓйØÎÊÌâʱ¿ÉÒÔ½«ËüÃǽøÐÐÀà±È£®ÀýÈçµç³¡Öз´Ó³¸÷µãµç³¡Ç¿ÈõµÄÎïÀíÁ¿Êǵ糡ǿ¶È£¬Æ䶨ÒåʽΪE=
£¬ÔÚÒýÁ¦³¡ÖпÉÒÔÓÐÒ»¸öÀàËƵÄÎïÀíÁ¿À´·´Ó³¸÷µãÒýÁ¦³¡µÄÇ¿Èõ£¬ÉèµØÇòÖÊÁ¿ÎªM£¬°ë¾¶ÎªR£¬µØÇò±íÃæ´¦µÄÖØÁ¦¼ÓËÙ¶ÈΪg£¬ÒýÁ¦³£Á¿ÎªG£¬Èç¹ûÒ»¸öÖÊÁ¿ÎªmµÄÎïÌåλÓÚ¾àÀëµØÐÄ2R´¦µÄijµã£¬ÔòÏÂÁбí´ïʽÖÐÄÜ·´Ó³¸ÃµãÒýÁ¦³¡Ç¿ÈõµÄÊÇ£¨¡¡¡¡£©
F |
q |
·ÖÎö£ºÒýÁ¦³¡µÄÇ¿ÈõÀàËÆÓڵ糡µÄÇ¿ÈõµÈÓÚÒýÁ¦ÓëÖÊÁ¿µÄ±ÈÖµ£®ÍòÓÐÒýÁ¦µÈÓÚÖØÁ¦£®
½â´ð£º½â£ºµç³¡µÄÇ¿ÈõµÈÓڵ糡Á¦ÓëµçÁ¿µÄ±ÈÖµ£¬ÒýÁ¦³¡µÄÇ¿ÈõÓëËüÀàËÆ£¬Ó¦µÈÓÚÒýÁ¦ÓëÖÊÁ¿µÄ±ÈÖµ£®
ÔÚ¾àÀëµØÐÄ2R´¦µÄijµã£¬ÖÊÁ¿ÎªmµÄÎïÌåËùÊܵÄÒýÁ¦Îª£ºF=G
=mg¡ä£®
ÒýÁ¦³¡µÃÇ¿ÈõΪ£º
=G
=g¡ä£®
¶øG
=mg
ËùÒÔg¡ä=
£®¹ÊDÕýÈ·£¬A¡¢B¡¢C´íÎó£®
¹ÊÑ¡D£®
ÔÚ¾àÀëµØÐÄ2R´¦µÄijµã£¬ÖÊÁ¿ÎªmµÄÎïÌåËùÊܵÄÒýÁ¦Îª£ºF=G
Mm |
(2R)2 |
ÒýÁ¦³¡µÃÇ¿ÈõΪ£º
F |
m |
M |
(2R)2 |
¶øG
Mm |
R2 |
ËùÒÔg¡ä=
g |
4 |
¹ÊÑ¡D£®
µãÆÀ£º½â¾ö±¾ÌâµÄ¹Ø¼üÕÆÎÕÍòÓÐÒýÁ¦µÈÓÚÖØÁ¦G
=mg¡ä£®ÒÔ¼°»áÓÃÀà±ÈµÄ·½·¨ÇóÒýÁ¦³¡Ç¿Èõ£®
Mm |
(2R)2 |
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿