ÌâÄ¿ÄÚÈÝ
![¾«Ó¢¼Ò½ÌÍø](http://thumb.1010pic.com/pic3/upload/images/201311/11/7de2c063.png)
£¨1£©»³öÁ£×Ó×ÔPµã³ö·¢ºóµÄÔ˶¯¹ì¼£Ê¾Òâͼ£¨ÖÁÉÙ»³ö¶þ´Î¾¹ýXÖáµÄÇé¿ö£©£»
£¨2£©Çó³öÁ£×Ó×ÔPµã³ö·¢ºóµ½µÚËĴξ¹ýXÖáµÄʱ¼äÄÚƽ¾ùËٶȵĴóС£®
·ÖÎö£º¸ù¾Ý°ë¾¶ÓëËٶȴ¹Ö±È·¶¨£¬È»ºó¸ù¾ÝÁ½´Å³¡Ö®±ÈÇó³ö°ë¾¶Ö®±È£¬»³ö¹ì¼££»
¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÍƵ¼³ö°ë¾¶¹«Ê½£¬¸ù¾Ý°ë¾¶ÓëÖÜÆÚ¹Øϵ¹«Ê½ÍƵ¼³öÖÜÆÚ¹«Ê½£¬½áºÏ¹ì¼£Ëã³öÁ£×ÓÇ°½øµÄλÒÆ£¬Æ½¾ùËٶȵÈÓÚλÒƳýÒÔʱ¼ä£®
¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÍƵ¼³ö°ë¾¶¹«Ê½£¬¸ù¾Ý°ë¾¶ÓëÖÜÆÚ¹Øϵ¹«Ê½ÍƵ¼³öÖÜÆÚ¹«Ê½£¬½áºÏ¹ì¼£Ëã³öÁ£×ÓÇ°½øµÄλÒÆ£¬Æ½¾ùËٶȵÈÓÚλÒƳýÒÔʱ¼ä£®
½â´ð£º½â£ºÉèÁ£×ÓÔ˶¯µÄ¹ì¼£°ë¾¶·Ö±ðΪr1¡¢r2£»ÖÜÆÚ·Ö±ðΪT1¡¢T2
£¨1£©Á£×ÓÔڴų¡B1Öй켣³¤¶ÈÊÇÒÔr1Ϊ°ë¾¶µÄÔ²Öܳ¤µÄ
£¬Á£×ÓÔÚB2´Å³¡ÖеĹ켣³¤¶ÈÊÇÒÔr2Ϊ°ë¾¶µÄÔ²Öܳ¤µÄ
£¬ÓÖr2=
£»¹Ê¹ì¼£ÈçͼËùʾ£®
![¾«Ó¢¼Ò½ÌÍø](http://thumb.1010pic.com/pic3/upload/images/201311/164/4e96d7ca.png)
£¨2£©¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉ£ºqv0B=m
¢Ù
ÓÖ£ºT1=
¢Ú
Óɢ٢ڵãºr1=
T1=
ͬÀí¿ÉµÃ£ºr2=
T2=
Á£×ÓÇ°½øµÄ¹ì¼£ÈçÉÏͼ£¬¿ÉÒÔ¿´³öÁ£×ÓÇ°½øµÄλÒÆS=PP4=r1+r2=
Á£×ÓÇ°½øµÄʱ¼ät=2£¨
+
£©=
Á£×ÓÔËÐеÄƽ¾ùËÙ¶È
=
=
=1.5m/s
´ð£º£¨1£©Èçͼ£®
£¨2£©Á£×Ó×ÔPµã³ö·¢ºóµ½µÚËĴξ¹ýXÖáµÄʱ¼äÄÚƽ¾ùËٶȵĴóС1.5m/s£®
£¨1£©Á£×ÓÔڴų¡B1Öй켣³¤¶ÈÊÇÒÔr1Ϊ°ë¾¶µÄÔ²Öܳ¤µÄ
1 |
6 |
5 |
6 |
r1 |
3 |
![¾«Ó¢¼Ò½ÌÍø](http://thumb.1010pic.com/pic3/upload/images/201311/164/4e96d7ca.png)
£¨2£©¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉ£ºqv0B=m
v02 |
r1 |
ÓÖ£ºT1=
2¦Ðr1 |
v0 |
Óɢ٢ڵãºr1=
mv0 |
qB1 |
T1=
2¦Ðm |
qB1 |
ͬÀí¿ÉµÃ£ºr2=
r1 |
3 |
T2=
T1 |
3 |
Á£×ÓÇ°½øµÄ¹ì¼£ÈçÉÏͼ£¬¿ÉÒÔ¿´³öÁ£×ÓÇ°½øµÄλÒÆS=PP4=r1+r2=
4mv0 |
3qB1 |
Á£×ÓÇ°½øµÄʱ¼ät=2£¨
T1 |
6 |
5T2 |
6 |
16¦Ðm |
9qB1 |
Á£×ÓÔËÐеÄƽ¾ùËÙ¶È
. |
v |
S |
T |
3v0 |
4¦Ð |
´ð£º£¨1£©Èçͼ£®
£¨2£©Á£×Ó×ÔPµã³ö·¢ºóµ½µÚËĴξ¹ýXÖáµÄʱ¼äÄÚƽ¾ùËٶȵĴóС1.5m/s£®
µãÆÀ£º´øµçÁ£×ÓÔڴų¡ÖÐÔ˶¯µÄÌâÄ¿½âÌâ²½ÖèΪ£º¶¨Ô²ÐÄ¡¢»¹ì¼£¡¢Çó°ë¾¶£®ÒªÕÆÎÕ×óÊÖ¶¨Ôò£¬ÊìÁ·ÔËÓÃÅ£¶ÙµÚ¶þ¶¨ÂÉÑо¿°ë¾¶£®
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿