ÌâÄ¿ÄÚÈÝ
£¨2011?ÉÇͷһģ£©Èçͼ¼×ÊÇÑéÖ¤¶¯Äܶ¨ÀíµÄ×°Ö㬳ýͼʾÆ÷²ÄÍ⣬»¹Óдòµã¼ÆʱÆ÷ËùÓõÄѧÉúµçÔ´¡¢µ¼Ïß¡¢¸´Ð´Ö½£¬ÌìƽºÍϸɳ£®
¢ÙÄãÈÏΪ»¹ÐèÒªµÄʵÑéÆ÷²ÄÓÐ
¢ÚʵÑéʱΪÁ˱£Ö¤»¬¿éÊܵ½µÄºÏÁ¦ÓëɳºÍɳͰµÄ×ÜÖØÁ¦´óС»ù±¾ÏàµÈ£¬Ó¦Âú×ãµÄʵÑéÌõ¼þÊÇ
¢ÛͼÒÒÊÇ»¬¿é£¨ÖÊÁ¿ÎªM£©ÔÚɳºÍɳͰµÄ×ÜÖÊÁ¿ÎªmÌõ¼þÏÂ×öÔȼÓËÙÖ±ÏßÔ˶¯µÄÖ½´ø£®²âÁ¿Êý¾ÝÒÑÓÃ×Öĸ±íʾÔÚͼÖУ¬´òµã¼ÆʱÆ÷µÄ´òµãÖÜÆÚΪT£®Ôò±¾ÊµÑé×îÖÕÒªÑéÖ¤µÄÊýѧ±í´ïʽΪ
¢ÙÄãÈÏΪ»¹ÐèÒªµÄʵÑéÆ÷²ÄÓÐ
¿Ì¶È³ß
¿Ì¶È³ß
£®¢ÚʵÑéʱΪÁ˱£Ö¤»¬¿éÊܵ½µÄºÏÁ¦ÓëɳºÍɳͰµÄ×ÜÖØÁ¦´óС»ù±¾ÏàµÈ£¬Ó¦Âú×ãµÄʵÑéÌõ¼þÊÇ
ɳºÍɳͰµÄ×ÜÖÊÁ¿Ô¶Ð¡ÓÚ»¬¿éµÄÖÊÁ¿
ɳºÍɳͰµÄ×ÜÖÊÁ¿Ô¶Ð¡ÓÚ»¬¿éµÄÖÊÁ¿
£¬ÊµÑéʱÊ×ÏÈÒª×öµÄ²½ÖèÊÇƽºâĦ²ÁÁ¦
ƽºâĦ²ÁÁ¦
£®¢ÛͼÒÒÊÇ»¬¿é£¨ÖÊÁ¿ÎªM£©ÔÚɳºÍɳͰµÄ×ÜÖÊÁ¿ÎªmÌõ¼þÏÂ×öÔȼÓËÙÖ±ÏßÔ˶¯µÄÖ½´ø£®²âÁ¿Êý¾ÝÒÑÓÃ×Öĸ±íʾÔÚͼÖУ¬´òµã¼ÆʱÆ÷µÄ´òµãÖÜÆÚΪT£®Ôò±¾ÊµÑé×îÖÕÒªÑéÖ¤µÄÊýѧ±í´ïʽΪ
mgxAB=
M£¨
£©
1 |
2 |
| ||||
4T2 |
mgxAB=
M£¨
£©
£®£¨ÓÃÌâÖеÄ×Öĸ±íʾ£©1 |
2 |
| ||||
4T2 |
·ÖÎö£º¢Ù´¦ÀíʵÑéÊý¾Ýʱ£¬ÐèÒªÇó³ö»¬¿éµÄËٶȣ¬ÐèÒªÓÿ̶ȳ߲â³öÖ½´øÉÏÁ½¼ÆÊýµã¼äµÄ¾àÀ룻
¢ÚʵÑéǰҪƽºâĦ²ÁÁ¦£¬Ê¹»¬¿éÊܵ½µÄºÏÁ¦µÈÓÚɳºÍɳͰµÄÖØÁ¦£»Ö»ÓÐÔÚ»¬¿éÖÊÁ¿Ô¶´óÓÚɳºÍɳͰ×ÜÖÊÁ¿µÄÇé¿öÏ£¬²Å¿É½üËÆÈÏΪ»¬¿éÊܵ½µÄÀÁ¦µÈÓÚɳºÍɳͰµÄÖØÁ¦£®
¢ÛÓÉÔȱäËÙÔ˶¯µÄÍÆÂÛÇó³ö»¬¿éµÄ˲ʱËٶȣ¬´úÈ붯Äܶ¨Àí±í´ïʽ¼´¿ÉÕýÈ·½âÌ⣮
¢ÚʵÑéǰҪƽºâĦ²ÁÁ¦£¬Ê¹»¬¿éÊܵ½µÄºÏÁ¦µÈÓÚɳºÍɳͰµÄÖØÁ¦£»Ö»ÓÐÔÚ»¬¿éÖÊÁ¿Ô¶´óÓÚɳºÍɳͰ×ÜÖÊÁ¿µÄÇé¿öÏ£¬²Å¿É½üËÆÈÏΪ»¬¿éÊܵ½µÄÀÁ¦µÈÓÚɳºÍɳͰµÄÖØÁ¦£®
¢ÛÓÉÔȱäËÙÔ˶¯µÄÍÆÂÛÇó³ö»¬¿éµÄ˲ʱËٶȣ¬´úÈ붯Äܶ¨Àí±í´ïʽ¼´¿ÉÕýÈ·½âÌ⣮
½â´ð£º½â£º¢Ù´¦ÀíʵÑéÊý¾ÝʱÐèÒª²â³ö¼ÆÊýµã¼äµÄ¾àÀ룬Òò´ËʵÑ黹ÐèÒª¿Ì¶È³ß£®
¢ÚʵÑéʱΪÁ˱£Ö¤»¬¿éÊܵ½µÄºÏÁ¦ÓëɳºÍɳͰµÄ×ÜÖØÁ¦´óС»ù±¾ÏàµÈ£¬ÐèÒª±£Ö¤É³ºÍɳͰµÄ×ÜÖÊÁ¿Ô¶Ð¡ÓÚ»¬¿éµÄÖÊÁ¿£»ÊµÑéʱÊ×ÏÈҪƽºâ»¬¿éÊܵ½µÄĦ²ÁÁ¦£®
¢Û×öÔȱäËÙÔ˶¯µÄÎïÌåÔÚij¶Îʱ¼äÄÚµÄƽ¾ùËٶȵÈÓڸöÎʱ¼äÖмäʱ¿ÌµÄ˲ʱËٶȣ¬ÔòAµãµÄËÙ¶ÈvA=
£¬BµãµÄËÙ¶ÈvB=
£¬
Óɶ¯Äܶ¨ÀíµÃ£ºmgxAB=
MvB2-
MvA2=
M£¨
£©£¬ÔòʵÑé×îÖÕÒªÑéÖ¤µÄÊýѧ±í´ïʽΪ£ºmgxAB=
M£¨
£©£»
¹Ê´ð°¸Îª£º¢Ù¿Ì¶È³ß£»¢ÚɳºÍɳͰµÄ×ÜÖÊÁ¿Ô¶Ð¡ÓÚ»¬¿éµÄÖÊÁ¿£»Æ½ºâĦ²ÁÁ¦£®¢ÛmgxAB=
M£¨
£©£®
¢ÚʵÑéʱΪÁ˱£Ö¤»¬¿éÊܵ½µÄºÏÁ¦ÓëɳºÍɳͰµÄ×ÜÖØÁ¦´óС»ù±¾ÏàµÈ£¬ÐèÒª±£Ö¤É³ºÍɳͰµÄ×ÜÖÊÁ¿Ô¶Ð¡ÓÚ»¬¿éµÄÖÊÁ¿£»ÊµÑéʱÊ×ÏÈҪƽºâ»¬¿éÊܵ½µÄĦ²ÁÁ¦£®
¢Û×öÔȱäËÙÔ˶¯µÄÎïÌåÔÚij¶Îʱ¼äÄÚµÄƽ¾ùËٶȵÈÓڸöÎʱ¼äÖмäʱ¿ÌµÄ˲ʱËٶȣ¬ÔòAµãµÄËÙ¶ÈvA=
xA |
2T |
xB |
2T |
Óɶ¯Äܶ¨ÀíµÃ£ºmgxAB=
1 |
2 |
1 |
2 |
1 |
2 |
| ||||
4T2 |
1 |
2 |
| ||||
4T2 |
¹Ê´ð°¸Îª£º¢Ù¿Ì¶È³ß£»¢ÚɳºÍɳͰµÄ×ÜÖÊÁ¿Ô¶Ð¡ÓÚ»¬¿éµÄÖÊÁ¿£»Æ½ºâĦ²ÁÁ¦£®¢ÛmgxAB=
1 |
2 |
| ||||
4T2 |
µãÆÀ£º¸ÃÌ⿼²éÁËÁ¦Ñ§ÊµÑéµÄ»ù±¾²Ù×÷ºÍÊý¾Ý´¦Àí£¬ÕýÈ·½â´ðÕâЩÎÊÌâµÄ¹Ø¼üÊÇÃ÷ȷʵÑéÔÀí£¬Ìá¸ßÓ¦Óûù±¾ÎïÀí¹æÂɽâ¾öʵÑéÎÊÌâµÄÄÜÁ¦£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿