ÌâÄ¿ÄÚÈÝ
Èçͼ¼×Ëùʾ£¬Ä³Í¬Ñ§ÔÚÉþ×ÓµÄÒ»¶ËË©Ò»¸öСɳ´ü£¬ÔÚÉþÉÏÀëСɳ´üÖØÐÄ40cmµÄµØ·½´òÒ»¸öÉþ½áA£¬80cmµÄµØ·½´òÁíÒ»¸öÉþ½áB£®
²Ù×÷Ò»ÊÖÎÕÉþ½áA£¬ÈçͼÒÒËùʾ£¬Ê¹É³´üÔÚˮƽ·½Ïò×öÔÈËÙÔ²ÖÜÔ˶¯£¬Ã¿ÃëÔ˶¯1ÖÜ£®Ìå»á´ËʱÉþ×ÓÀÁ¦µÄ´óС£¬¼Ç×÷F1£»
²Ù×÷¶þ¸ÄΪÊÖÎÕÉþ½áB£¬ÈÔʹɳ´üÔÚˮƽ·½ÏòÉÏÿÃëÔ˶¯1ÖÜ£¬Ìå»á´ËʱÉþ×ÓÀÁ¦µÄ´óС£¬¼Ç×÷F2£»
²Ù×÷ÈýÓÖ¸ÄΪÊÖÎÕÉþ½áA£¬µ«Ê¹É³´üÔÚˮƽ·½ÏòÉÏÿÃëÔ˶¯2ÖÜ£¬Ìå»á´ËʱÉþ×ÓÀÁ¦´óС£¬¼Ç×÷F3£®
£¨1£©²Ù×÷¶þÓë²Ù×÷Ò»ÖУ¬¸Ãͬѧ¸Ðµ½ÄÄ´ÎÏòÐÄÁ¦±È½Ï´ó£¿´ð£º______£¨ÌîF1»òF2£©£»
£¨2£©²Ù×÷ÈýÓë²Ù×÷¶þÖУ¬¸Ãͬѧ¸Ðµ½ÄÄ´ÎÏòÐÄÁ¦±È½Ï´ó£¿´ð£º______£¨ÌîF2»òF3£©£®
![](http://thumb.1010pic.com/pic2/upload/papers/20140610/201406102236392057599.png)
²Ù×÷Ò»ÊÖÎÕÉþ½áA£¬ÈçͼÒÒËùʾ£¬Ê¹É³´üÔÚˮƽ·½Ïò×öÔÈËÙÔ²ÖÜÔ˶¯£¬Ã¿ÃëÔ˶¯1ÖÜ£®Ìå»á´ËʱÉþ×ÓÀÁ¦µÄ´óС£¬¼Ç×÷F1£»
²Ù×÷¶þ¸ÄΪÊÖÎÕÉþ½áB£¬ÈÔʹɳ´üÔÚˮƽ·½ÏòÉÏÿÃëÔ˶¯1ÖÜ£¬Ìå»á´ËʱÉþ×ÓÀÁ¦µÄ´óС£¬¼Ç×÷F2£»
²Ù×÷ÈýÓÖ¸ÄΪÊÖÎÕÉþ½áA£¬µ«Ê¹É³´üÔÚˮƽ·½ÏòÉÏÿÃëÔ˶¯2ÖÜ£¬Ìå»á´ËʱÉþ×ÓÀÁ¦´óС£¬¼Ç×÷F3£®
£¨1£©²Ù×÷¶þÓë²Ù×÷Ò»ÖУ¬¸Ãͬѧ¸Ðµ½ÄÄ´ÎÏòÐÄÁ¦±È½Ï´ó£¿´ð£º______£¨ÌîF1»òF2£©£»
£¨2£©²Ù×÷ÈýÓë²Ù×÷¶þÖУ¬¸Ãͬѧ¸Ðµ½ÄÄ´ÎÏòÐÄÁ¦±È½Ï´ó£¿´ð£º______£¨ÌîF2»òF3£©£®
![](http://thumb.1010pic.com/pic2/upload/papers/20140610/201406102236392057599.png)
²Ù×÷Ò»ºÍ²Ù×÷¶þ£¬¶¼ÊÇÿÃëת¶¯Ò»È¦£¬Ôò½ÇËÙ¶ÈÏàµÈ£¬¸ù¾ÝF=m¦Ø2rÖª£¬°ë¾¶´óʱËùÐèµÄÏòÐÄÁ¦´ó£¬ÔòÀÁ¦´ó£®Öª²Ù×÷¶þ¸Ðµ½ÏòÐÄÁ¦½Ï´ó£¬¼´F2½Ï´ó£®
²Ù×÷ÈýºÍ²Ù×÷¶þ±È½Ï£¬²Ù×÷¶þ1sÄÚת¹ýµÄ»¡³¤Îª2¦Ðr£¬²Ù×÷Èý1sÄÚת¹ýµÄ»¡³¤Îª2¡Á2¦Ð¡Á
=2¦Ðr£®ÖªÏßËÙ¶ÈÏàͬ£¬¸ù¾ÝF=m
Öª£¬°ë¾¶Ð¡Ê±ÏòÐÄÁ¦´ó£¬Ôò²Ù×÷Èý¸Ðµ½ÏòÐÄÁ¦½Ï´ó£¬¼´F3½Ï´ó£®
¹Ê´ð°¸Îª£º£¨1£©F2£»£¨2£©F3
²Ù×÷ÈýºÍ²Ù×÷¶þ±È½Ï£¬²Ù×÷¶þ1sÄÚת¹ýµÄ»¡³¤Îª2¦Ðr£¬²Ù×÷Èý1sÄÚת¹ýµÄ»¡³¤Îª2¡Á2¦Ð¡Á
r |
2 |
v2 |
r |
¹Ê´ð°¸Îª£º£¨1£©F2£»£¨2£©F3
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿