ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ£¬Ò»Ë®Æ½¹â»¬¡¢¾àµØÃæ¸ßΪ h¡¢±ß³¤Îª a µÄÕý·½ÐÎ MNPQ ×ÀÃæÉÏ£¬Óó¤Îª L µÄ²»¿ÉÉ쳤µÄÇáÉþÁ¬½ÓÖÊÁ¿·Ö±ðΪmA¡¢mBµÄ A¡¢B Á½Ð¡Çò£®Á½Ð¡ÇòÔÚÉþ×ÓÀÁ¦µÄ×÷ÓÃÏ£¬ÈÆÉþ×ÓÉϵÄijµã O ÒÔ²»Í¬µÄÏßËÙ¶È×öÔÈËÙÔ²ÖÜÔ˶¯£¬Ô²ÐÄ O Óë×ÀÃæÖÐÐÄÖغϣ®ÒÑÖª m?A? 0.5kg£¬L??1.2m£¬L?AO?? 0.8m£¬a??2.1m£¬h?? 1.25m£¬A ÇòµÄËٶȴóСv A?? 0.4m/s£¬ÖØÁ¦¼ÓËÙ¶È g È¡ 10m/s2£¬Çó£º
£¨1£©Éþ×ÓÉϵÄÀÁ¦ F ÒÔ¼° B ÇòµÄÖÊÁ¿m B£»
£¨2£©Èôµ±Éþ×ÓÓë MN ƽÐÐʱͻȻ¶Ï¿ª£¬Ôò¾¹ý 1.5sÁ½ÇòµÄ¾àÀ룻
£¨3£©Á½Ð¡ÇòÂäÖÁµØÃæʱ£¬ÂäµãµÄ¾àÀ룮![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356357974376.jpg)
£¨1£©Éþ×ÓÉϵÄÀÁ¦ F ÒÔ¼° B ÇòµÄÖÊÁ¿m B£»
£¨2£©Èôµ±Éþ×ÓÓë MN ƽÐÐʱͻȻ¶Ï¿ª£¬Ôò¾¹ý 1.5sÁ½ÇòµÄ¾àÀ룻
£¨3£©Á½Ð¡ÇòÂäÖÁµØÃæʱ£¬ÂäµãµÄ¾àÀ룮
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356357974376.jpg)
£¨1£©
£¨2£©1.5m£¨3£©![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356358601377.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135635844952.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356358601377.png)
£¨1£©![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356359221400.png)
ÓÉ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135635984909.png)
µÃ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135635844952.png)
£¨2£©![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356362651113.png)
¾àÀëΪ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356363121141.png)
£¨3£©![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356364371235.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356364991362.png)
¾àÀëΪ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356365931389.png)
±¾Ì⿼²éÔ²ÖÜÔ˶¯¹æÂÉ,ABÁ½¸öСÇòΧÈÆͬһ¸öÖáת¶¯,½ÇËÙ¶ÈÏàͬ,¿ÉÉè½ÇËÙ¶ÈΪw,ÁÐʽÇó½â
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356359221400.png)
ÓÉ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135635984909.png)
µÃ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135635844952.png)
£¨2£©
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356362651113.png)
¾àÀëΪ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356363121141.png)
£¨3£©
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356364371235.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356364991362.png)
¾àÀëΪ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241356365931389.png)
±¾Ì⿼²éÔ²ÖÜÔ˶¯¹æÂÉ,ABÁ½¸öСÇòΧÈÆͬһ¸öÖáת¶¯,½ÇËÙ¶ÈÏàͬ,¿ÉÉè½ÇËÙ¶ÈΪw,ÁÐʽÇó½â
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿