ÌâÄ¿ÄÚÈÝ

µ½Ä¿Ç°ÎªÖ¹£¬»ðÐÇÊdzýÁ˵ØÇòÒÔÍâÈËÀàÁ˽â×î¶àµÄÐÐÐÇ£¬ÒѾ­Óг¬¹ý30ö̽²âÆ÷µ½´ï¹ý»ðÐÇ£¬²¢·¢»ØÁË´óÁ¿Êý¾Ý£®Èç¹ûÒÑÖªÍòÓÐÒýÁ¦³£Á¿ÎªG£¬¸ù¾ÝÏÂÁвâÁ¿Êý¾Ý£¬Äܹ»µÃ³ö»ðÐÇÃܶȵÄÊÇ

A£®·¢ÉäÒ»¿ÅÈÆ»ðÐÇ×öÔÈËÙÔ²ÖÜÔ˶¯µÄÎÀÐÇ£¬²â³öÎÀÐǵĹìµÀ°ë¾¶rºÍÎÀÐǵÄÖÜÆÚT
B£®ÔÚ»ðÐDZíÃæʹһ¸öСÇò×ö×ÔÓÉÂäÌåÔ˶¯£¬²â³öÏÂÂäµÄ¸ß¶ÈHºÍʱ¼ät
C£®·¢ÉäÒ»¿ÅÌù½ü»ðÐDZíÃæÈÆ»ðÐÇ×öÔÈËÙÔ²ÖÜÔ˶¯µÄ·É´¬£¬²â³ö·É´¬ÔËÐеÄËÙ¶Èv
D£®·¢ÉäÒ»¿ÅÌù½ü»ðÐDZíÃæÈÆ»ðÐÇ×öÔÈËÙÔ²ÖÜÔ˶¯µÄ·É´¬£¬²â³ö·É´¬ÔËÐеĽÇËٶȦØ

D

½âÎöÊÔÌâ·ÖÎö£º¾ÝAÑ¡ÏîÖеÄÒÑÖªÁ¿ÓУºGMm/r2=mr42/T2£¬M=4R3¦Ñ/3£¬Òª²âÁ¿»ðÐÇÃܶȻ¹ÐèÒªÖªµÀ»ðÐǵİ뾶£¬AÑ¡Ïî´íÎó£»¾ÝBÑ¡ÏîµÄÒÑÖªÁ¿ÓУºH=gt2/2£¬GMm/r2=mg£¬M=4R3¦Ñ/3£¬Òª²âÁ¿»ðÐÇÃܶȻ¹ÐèÒªÖªµÀ»ðÐǵİ뾶£¬BÑ¡Ïî´íÎó£»¾ÝCÑ¡ÏîÖеÄÒÑÖªÁ¿ÓУºGMm/r2=mv2/r£¬M=4R3¦Ñ/3£¬µÃv2=4R¦Ñ/3Òª²âÁ¿»ðÐÇÃܶȻ¹ÐèÒªÖªµÀ»ðÐǵİ뾶£¬CÑ¡Ïî´íÎó£»¾ÝDÑ¡ÏîÖеÄÒÑÖªÁ¿ÓУºGMm/r2=mrw2£¬M=4R3¦Ñ/3£¬µÃ¦Ñ=3w2/4G£¬ËùÒÔDÑ¡ÏîÕýÈ·¡£
¿¼µã£º±¾Ì⿼²éÍòÓÐÒýÁ¦¶¨ÂɵÄÓ¦Óá£

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø