ÔÚÏÂÁÐÁ½ÌâÖÐÈÎÑ¡Ò»Ìâ×ö

A£®Èçͼ£¬Ò»ÖÊÁ¿Îªm=10kgµÄÎïÌ壬ÓÉ1/4¹â»¬Ô²»¡¹ìµÀÉ϶˴Ӿ²Ö¹¿ªÊ¼Ï»¬£¬µ½´ïµ×¶ËºóÑØˮƽÃæÏòÓÒ»¬¶¯1m¾àÀëºóÍ£Ö¹¡£ÒÑÖª¹ìµÀ°ë¾¶R=0£®8m£¬g=10m/s2£¬Çó£º

£¨1£©ÎïÌ廬ÖÁÔ²»¡µ×¶ËʱµÄËٶȴóС

£¨2£©ÎïÌ廬ÖÁÔ²»¡µ×¶Ëʱ¶Ô¹ìµÀµÄѹÁ¦´óС

£¨3£©ÎïÌåÑØˮƽÃ滬¶¯¹ý³ÌÖп˷þĦ²ÁÁ¦×öµÄ¹¦

 

 

 

B£®Ì«ÑôÕý´¦ÓÚÖ÷ÐòÐÇÑÝ»¯½×¶Î£¬ÎªÁËÑо¿Ì«ÑôÑÝ»¯½ø³Ì£¬ÐèÖªµÀÄ¿Ç°Ì«ÑôµÄÖÊÁ¿M¡£ÒÑÖªµØÇò°ë¾¶R=6£®4¡Á106m£¬µØÇòÖÊÁ¿m =6£®0¡Á1024©K£¬ÈÕµØÖÐÐĵľàÀër=1£®5¡Á1011 m£¬µØÇò±íÃæ´¦µÄÖØÁ¦¼ÓËÙ¶Èg=10 m£¯s2£¬1ÄêԼΪ3£®2¡Á107 s£¬ÊÔ¹ÀËãÄ¿Ç°Ì«ÑôµÄÖÊÁ¿M¡£

 

 

 

 

 

 

 

 A£®£¨1£©4m/s       £¨2£©300N     £¨3£© 80J 

B£®kg

 

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£ºÉÂÎ÷Ê¡Î÷°²Ò»ÖÐ2009-2010ѧÄê¸ßÒ»ÏÂѧÆÚÆÚÄ© ÌâÐÍ£º¼ÆËãÌâ

 ÔÚÏÂÁÐÁ½ÌâÖÐÈÎÑ¡Ò»Ìâ×ö

A£®Èçͼ£¬Ò»ÖÊÁ¿Îªm=10kgµÄÎïÌ壬ÓÉ1/4¹â»¬Ô²»¡¹ìµÀÉ϶˴Ӿ²Ö¹¿ªÊ¼Ï»¬£¬µ½´ïµ×¶ËºóÑØˮƽÃæÏòÓÒ»¬¶¯1m¾àÀëºóÍ£Ö¹¡£ÒÑÖª¹ìµÀ°ë¾¶R=0£®8m£¬g=10m/s2£¬Çó£º

£¨1£©ÎïÌ廬ÖÁÔ²»¡µ×¶ËʱµÄËٶȴóС

£¨2£©ÎïÌ廬ÖÁÔ²»¡µ×¶Ëʱ¶Ô¹ìµÀµÄѹÁ¦´óС

£¨3£©ÎïÌåÑØˮƽÃ滬¶¯¹ý³ÌÖп˷þĦ²ÁÁ¦×öµÄ¹¦

 

 

 

B£®Ì«ÑôÕý´¦ÓÚÖ÷ÐòÐÇÑÝ»¯½×¶Î£¬ÎªÁËÑо¿Ì«ÑôÑÝ»¯½ø³Ì£¬ÐèÖªµÀÄ¿Ç°Ì«ÑôµÄÖÊÁ¿M¡£ÒÑÖªµØÇò°ë¾¶R= 6£®4¡Á106m£¬µØÇòÖÊÁ¿m =6£®0¡Á1024©K£¬ÈÕµØÖÐÐĵľàÀër=1£®5¡Á1011 m£¬µØÇò±íÃæ´¦µÄÖØÁ¦¼ÓËÙ¶Èg=10 m£¯s2£¬1ÄêԼΪ3£®2¡Á107 s£¬ÊÔ¹ÀËãÄ¿Ç°Ì«ÑôµÄÖÊÁ¿M¡£

 

 

 

 

 

 

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÔĶÁÀí½â

´ÓÁ½µÀÎïÀíÌâÖÐÈÎÑ¡Ò»Ìâ×÷´ð

1£ÛÎïÀí¡ª¡ªÑ¡ÐÞ3-3£Ý

£¨1£©ÏÖ´ú¿Æѧ¼¼ÊõµÄ·¢Õ¹Óë²ÄÁÏ¿Æѧ¡¢ÄÜÔ´µÄ¿ª·¢ÃÜÇÐÏà¹Ø£¬ÏÂÁйØÓÚ²ÄÁÏ¡¢ÄÜÔ´µÄ˵·¨ÕýÈ·µÄÊÇ___________¡££¨ÌîÑ¡ÏîÇ°µÄ±àºÅ£©

¢Ù»¯Ê¯ÄÜԴΪÇå½àÄÜÔ´

¢ÚÄÉÃײÄÁϵÄÁ£¶ÈÔÚ1¡«100 ¦ÌmÖ®¼ä

¢Û°ëµ¼Ìå²ÄÁϵĵ¼µçÐÔÄܽéÓÚ½ðÊôµ¼ÌåºÍ¾øÔµÌåÖ®¼ä

¢ÜÒº¾§¼ÈÓÐÒºÌåµÄÁ÷¶¯ÐÔ£¬ÓÖÓйâѧÐÔÖʵĸ÷ÏòͬÐÔ

£¨2£©Ò»¶¨ÖÊÁ¿µÄÀíÏëÆøÌåÔÚijһ¹ý³ÌÖУ¬Íâ½ç¶ÔÆøÌå×ö¹¦7.0¡Á104 J£¬ÆøÌåÄÚÄܼõÉÙ1.3¡Á105 J£¬Ôò´Ë¹ý³Ì___________¡££¨ÌîÑ¡ÏîÇ°µÄ±àºÅ£©

¢ÙÆøÌå´ÓÍâ½çÎüÊÕÈÈÁ¿2.0¡Á105 J                ¢ÚÆøÌåÏòÍâ½ç·Å³öÈÈÁ¿2.0¡Á105 J

¢ÛÆøÌå´ÓÍâ½çÎüÊÕÈÈÁ¿6.0¡Á104 J                ¢ÜÆøÌåÏòÍâ½ç·Å³öÈÈÁ¿6.0¡Á104 J

2£ÛÎïÀí¡ª¡ªÑ¡ÐÞ3-5£Ý

£¨1£©Ëæ×ÅÏÖ´ú¿ÆѧµÄ·¢Õ¹£¬´óÁ¿µÄ¿Æѧ·¢ÏÖ´Ù½øÁËÈËÃǶÔÔ­×Ó¡¢Ô­×Ӻ˵ÄÈÏʶ£¬ÏÂÁÐÓйØÔ­×Ó¡¢Ô­×Ӻ˵ÄÐðÊöÕýÈ·µÄÊÇ___________¡££¨ÌîÑ¡ÏîÇ°µÄ±àºÅ£©

¢Ù¬ɪ¸£¦ÁÁ£×ÓÉ¢ÉäʵÑé˵Ã÷Ô­×ÓºËÄÚ²¿¾ßÓи´ÔӵĽṹ

¢ÚÌìÈ»·ÅÉäÏÖÏó±íÃ÷Ô­×ÓºËÄÚ²¿Óеç×Ó

¢ÛÇáºË¾Û±ä·´Ó¦·½³ÌÓУº

¢ÜÇâÔ­×Ó´Ón=3Äܼ¶Ô¾Ç¨µ½n=1Äܼ¶ºÍ´Ón=2Äܼ¶Ô¾Ç¨µ½n=1Äܼ¶£¬Ç°ÕßԾǨ·øÉä³öµÄ¹â×Ó²¨³¤±ÈºóÕߵij¤

£¨2£©Ò»ÅÚͧ×ÜÖÊÁ¿ÎªM£¬ÒÔËÙ¶Èv0ÔÈËÙÐÐÊ»£¬´ÓͧÉÏÒÔÏà¶Ôº£°¶µÄˮƽËÙ¶ÈvÑØÇ°½ø·½ÏòÉä³öÒ»ÖÊÁ¿ÎªmµÄÅÚµ¯£¬·¢ÉäÅÚµ¯ºóͧµÄËÙ¶ÈΪv¡ä£¬Èô²»¼ÆË®µÄ×èÁ¦£¬ÔòÏÂÁи÷¹ØϵʽÖÐÕýÈ·µÄÊÇ_________________¡££¨ÌîÑ¡ÏîÇ°µÄ±àºÅ£©

¢ÙMv0=(M-m)v¡ä+mv                          ¢ÚMv0=(M-m)v¡ä+m(v+v0)

¢ÛMv0=(M-m)v¡ä+m(v+v¡ä)                      ¢ÜMv0=Mv¡ä+mv

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸