ÌâÄ¿ÄÚÈÝ
£¨8·Ö)ijͬѧÓÃÈçͼËùʾµÄ×°ÖÃ×ö¡°Ì½¾¿×ö¹¦ºÍÎïÌ嶯Äܱ仯µÄ¹Øϵ¡±µÄʵÑ飬ËùÓÃС³µµÄÖÊÁ¿m=0.25kg£¬´òµã¼ÆʱÆ÷ËùÓý»Á÷µçÔ´µÄƵÂÊΪ50Hz
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082414065106211242.png)
(1)ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£º
A£®Æ½ºâĦ²ÁÁ¦Ê±£¬Ó¦°ÑÏðƤ½î¹ÒÔÚС³µÉÏ£¬Ê¹Ð¡³µÄÜÔÚľ°åÉÏÔÈËÙ»¬¶¯
B£®ÊµÑéʱӦÏȽÓͨµçÔ´£¬ÔÙÊÍ·ÅС³µ
C£®ÊµÑéÖÐÔÚÿ´ÎÔö¼ÓÏðƤ½îµÄÌõÊýʱӦʹÁ¬ÈëÌú¶¤¼äµÄÏðƤ½îÐαä³Ì¶ÈÏàͬ£¬²¢Ê¹Ð¡³µÃ¿´Î¶¼´ÓͬһλÖÃÊÍ·Å
D£®ÔÚͨ¹ýÖ½´øÇóËÙ¶Èʱ£¬Ó¦ÔÚÖ½´øÉÏÑ¡³öÒ»¶ÎÇåÎúµÄµã¼£Çó³öƽ¾ùËٶȼ´¿É
(2)ÕýȷƽºâºÃĦ²ÁÁ¦½øÐÐʵÑéʱ£¬ÔÚÏðƤ½îµ¯Á¦×÷ÓÃÏ£¬ºÏÁ¦¶ÔС³µËù×öµÄ¹¦______(Ñ¡Ìî¡°´óÓÚ¡±¡¢¡°Ð¡ÓÚ¡±»ò¡°µÈÓÚ¡±)ÏðƤ½îµ¯Á¦Ëù×öµÄ¹¦£»ÈôµÚÒ»¡¢Èý´Î·Ö±ðÓÃÒ»Ìõ¡¢ÈýÌõ²¢ÔÚÒ»ÆðµÄÏàͬÏðƤ½î×öʵÑ飬ÇÒÁ½´ÎÏðƤ½îµÄÉ쳤Ïàͬ£¬ÔòµÚÈý´ÎʵÑéÖÐÏðƤ½î¶ÔС³µ×öµÄ¹¦ÊǵÚÒ»´ÎʵÑéµÄ______±¶¡£
(3)ÏÂͼÊǸÃͬѧÔÚÕýȷʵÑé¹ý³ÌÖеõ½µÄÒ»ÌõÖ½´ø£¬ÏàÁÚµÄÁ½¸ö¶ÁÊýµã¼ä»¹ÓÐÒ»¸öµãûÓл³öÀ´£¬A¡¢B¡¢C¡¢D¡¢E¡¢F¸÷µãµ½0µãµÄ¾àÀë·Ö±ðΪ£º1.87cm¡¢4.79cm¡¢8.91cm¡¢16.92cm¡¢25.83cm¡¢34.74cm£¬ÔòÓÉÖ½´ø¿ÉÖª±¾´ÎʵÑéÖÐÏðƤ½î¶ÔС³µ×öµÄ¹¦ÊÇ______J¡£![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241406511254002.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082414065106211242.png)
(1)ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£º
A£®Æ½ºâĦ²ÁÁ¦Ê±£¬Ó¦°ÑÏðƤ½î¹ÒÔÚС³µÉÏ£¬Ê¹Ð¡³µÄÜÔÚľ°åÉÏÔÈËÙ»¬¶¯
B£®ÊµÑéʱӦÏȽÓͨµçÔ´£¬ÔÙÊÍ·ÅС³µ
C£®ÊµÑéÖÐÔÚÿ´ÎÔö¼ÓÏðƤ½îµÄÌõÊýʱӦʹÁ¬ÈëÌú¶¤¼äµÄÏðƤ½îÐαä³Ì¶ÈÏàͬ£¬²¢Ê¹Ð¡³µÃ¿´Î¶¼´ÓͬһλÖÃÊÍ·Å
D£®ÔÚͨ¹ýÖ½´øÇóËÙ¶Èʱ£¬Ó¦ÔÚÖ½´øÉÏÑ¡³öÒ»¶ÎÇåÎúµÄµã¼£Çó³öƽ¾ùËٶȼ´¿É
(2)ÕýȷƽºâºÃĦ²ÁÁ¦½øÐÐʵÑéʱ£¬ÔÚÏðƤ½îµ¯Á¦×÷ÓÃÏ£¬ºÏÁ¦¶ÔС³µËù×öµÄ¹¦______(Ñ¡Ìî¡°´óÓÚ¡±¡¢¡°Ð¡ÓÚ¡±»ò¡°µÈÓÚ¡±)ÏðƤ½îµ¯Á¦Ëù×öµÄ¹¦£»ÈôµÚÒ»¡¢Èý´Î·Ö±ðÓÃÒ»Ìõ¡¢ÈýÌõ²¢ÔÚÒ»ÆðµÄÏàͬÏðƤ½î×öʵÑ飬ÇÒÁ½´ÎÏðƤ½îµÄÉ쳤Ïàͬ£¬ÔòµÚÈý´ÎʵÑéÖÐÏðƤ½î¶ÔС³µ×öµÄ¹¦ÊǵÚÒ»´ÎʵÑéµÄ______±¶¡£
(3)ÏÂͼÊǸÃͬѧÔÚÕýȷʵÑé¹ý³ÌÖеõ½µÄÒ»ÌõÖ½´ø£¬ÏàÁÚµÄÁ½¸ö¶ÁÊýµã¼ä»¹ÓÐÒ»¸öµãûÓл³öÀ´£¬A¡¢B¡¢C¡¢D¡¢E¡¢F¸÷µãµ½0µãµÄ¾àÀë·Ö±ðΪ£º1.87cm¡¢4.79cm¡¢8.91cm¡¢16.92cm¡¢25.83cm¡¢34.74cm£¬ÔòÓÉÖ½´ø¿ÉÖª±¾´ÎʵÑéÖÐÏðƤ½î¶ÔС³µ×öµÄ¹¦ÊÇ______J¡£
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241406511254002.jpg)
£¨Ã¿¿Õ2·Ö£¬¹²4¸ö¿Õ£¬×ܼÆ8·Ö£©BC£¬ µÈÓÚ£¬3£¬ 0.62
±¾Ì⿼²éµÄÊǶԡ°Ì½¾¿×ö¹¦ºÍÎïÌ嶯Äܱ仯µÄ¹Øϵ¡±µÄʵÑéÕÆÎÕÇé¿ö£¬ÊµÑéʱӦÏȽÓͨµçÔ´£¬ÔÙÊÍ·ÅС³µ£»ÊµÑéÖÐÔÚÿ´ÎÔö¼ÓÏðƤ½îµÄÌõÊýʱӦʹÁ¬ÈëÌú¶¤¼äµÄÏðƤ½îÐαä³Ì¶ÈÏàͬ£¬²¢Ê¹Ð¡³µÃ¿´Î¶¼´ÓͬһλÖÃÊÍ·Å£»BCÕýÈ·£»ÕýȷƽºâºÃĦ²ÁÁ¦½øÐÐʵÑéʱ£¬ÔÚÏðƤ½îµ¯Á¦×÷ÓÃÏ£¬ºÏÁ¦¶ÔС³µËù×öµÄ¹¦µÈÓÚÏðƤ½îµ¯Á¦Ëù×öµÄ¹¦¡£ÈôµÚÒ»¡¢Èý´Î·Ö±ðÓÃÒ»Ìõ¡¢ÈýÌõ²¢ÔÚÒ»ÆðµÄÏàͬÏðƤ½î×öʵÑ飬ÇÒÁ½´ÎÏðƤ½îµÄÉ쳤Ïàͬ£¬ÔòµÚÈý´ÎʵÑéÖÐÏðƤ½î¶ÔС³µ×öµÄ¹¦ÊǵÚÒ»´ÎʵÑéµÄ3±¶¡£
£¬t=0.04s£¬½âµÃ
£¬¸ù¾Ý¶¯Äܶ¨Àí£¬ÊµÑéÖÐÏðƤ½î¶ÔС³µ×öµÄ¹¦£º
£»
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241406511252211.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241406511711062.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241406512341092.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿