ÌâÄ¿ÄÚÈÝ

£¨2008?ÐÂÒÊÊÐÄ£Ä⣩ijһ·¢´ï¹ú¼ÒµÄÓԱÍê³ÉÁ˶ԻðÐDZíÃæµÄ¿Æѧ¿¼²ìÈÎÎñ£¬³Ë×ø·µ»Ø²Õ·µ»ØΧÈÆ»ðÐÇ×öÔ²ÖÜÔ˶¯µÄ¹ìµÀ²Õ£¬ÈçͼËùʾ£®ÎªÁË°²È«£¬·µ»Ø²ÕÓë¹ìµÀ²Õ¶Ô½Óʱ£¬±ØÐë¾ßÓÐÏàͬµÄËٶȣ®ÒÑÖª·µ»Ø²Õ·µ»Ø¹ý³ÌÖÐÐè¿Ë·þ»ðÐǵÄÒýÁ¦¶ø×öµÄ¹¦¿ÉÓÉÈçϹ«Ê½¼ÆË㣺W=mgR(1-
R
r
)
£¬ÆäÖУºRΪ»ðÐǵİ뾶£¬rΪ¹ìµÀ²Õµ½»ðÐÇÖÐÐĵľàÀ룬mΪ·µ»Ø²ÕÓëÈ˵Ä×ÜÖÊÁ¿£¬gΪ»ðÐDZíÃæµÄÖØÁ¦¼ÓËٶȣ®ÒÑÖª±¾´Î¿Æѧ¿¼²ìÖйìµÀ²Õµ½»ðÐÇÖÐÐĵľàÀër=
4
3
R
£¬Éè m¡¢R¡¢gΪÒÑÖªµÄÎïÀíÁ¿£®²»¼Æ»ðÐDZíÃæ´óÆø¶Ô·µ»Ø²ÕµÄ×èÁ¦ºÍ»ðÐÇ×ÔתµÄÓ°Ï죬Ôò¸ÃÓԱ³Ë×øµÄ·µ»Ø²ÕÖÁÉÙÐèÒª»ñµÃ¶àÉÙÄÜÁ¿²ÅÄÜÍê³ÉÓë¹ìµÀ²Õ¶Ô½Ó£¿°²È«·µ»Øµ½¹ìµÀ²Õ£®
·ÖÎö£º¸ù¾Ý»ðÐDZíÃæµÄÖØÁ¦µÈÓÚÍòÓÐÒýÁ¦ÁгöµÈʽ£®
Ñо¿¹ìµÀ²ÕÈÆÎÀÐÇ×öÔÈËÙÔ²ÖÜÔ˶¯£¬¸ù¾ÝÍòÓÐÒýÁ¦ÌṩÏòÐÄÁ¦£¬ÁгöµÈʽÇó½âÓԱ³Ë×ø·µ»Ø²ÕÓë¹ìµÀ²Õ¶Ô½ÓʱËٶȣ®
¸ù¾ÝÄÜÁ¿ÊغãÇó½â·µ»Ø¹ìµÀ²ÕÖÁÉÙÐèÒª»ñµÃµÄÄÜÁ¿£®
½â´ð£º½â£º·µ»Ø²ÕÓëÈËÔÚ»ðÐDZíÃ渽½üÓУºG
Mm
R2
=mg

Éè·µ»Ø²ÕÓë¹ìµÀ²Õ¶Ô½ÓʱËٶȴóСΪv£¬Ôò£ºG
Mm
r2
=m
v2
r

·µ»Ø²ÕÓë¹ìµÀ²Õ¶Ô½Óʱ£¬¾ßÓеĶ¯ÄÜΪ£ºEK=
1
2
mv2

°ÑÉÏÃæÁ½Ê½´úÈ룬µÃ£ºEK=
3
8
mgR

·µ»Ø²Õ·µ»Ø¹ý³Ì¿Ë·þÒýÁ¦×ö¹¦W=mgR(1-
R
r
)
=
1
4
mgR

ËùÒÔ·µ»Ø²Õ·µ»ØʱÖÁÉÙÐèÒªÄÜÁ¿E=EK+W=
5
8
mgR

´ð£º¸ÃÓԱ³Ë×øµÄ·µ»Ø²ÕÖÁÉÙÐèÒª»ñµÃ
5
8
mgR
ÄÜÁ¿²ÅÄÜÍê³ÉÓë¹ìµÀ²Õ¶Ô½Ó°²È«·µ»Øµ½¹ìµÀ²Õ£®
µãÆÀ£ºÏòÐÄÁ¦µÄ¹«Ê½Ñ¡È¡Òª¸ù¾ÝÌâÄ¿ÌṩµÄÒÑÖªÎïÀíÁ¿»òËùÇó½âµÄÎïÀíÁ¿Ñ¡È¡Ó¦Óã®
ºöÂÔÐÇÇò×ÔתµÄÓ°Ï죬Äܸù¾ÝÍòÓÐÒýÁ¦µÈÓÚÖØÁ¦ÁгöµÈʽ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø