ÌâÄ¿ÄÚÈÝ
ÈýλͬѧÓò»Í¬µÄÆ÷²Ä·Ö±ð½øÐÐÈçÏÂʵÑ飺
¡¾Ð¡Ìâ1¡¿¼×ͬѧÀûÓÃÏÖ´úÐÅÏ¢¼¼Êõ½øÐÐDISʵÑé¡£ÈçͼËùʾΪÓÃDIS²â±äËÙÖ±ÏßÔ˶¯µÄ˲ʱËٶȵÄ×°ÖÃͼ£¬Í¼ÖТÙËùʾµÄÆ÷²ÄΪ________
A£®Î»ÒÆ´«¸ÐÆ÷ | B£®Ëٶȴ«¸ÐÆ÷ |
C£®Ô˶¯´«¸ÐÆ÷ | D£®¹âµçÃÅ´«¸ÐÆ÷ |
![](http://thumb.1010pic.com/pic5/tikupic/f6/f/ge9lt.png)
¡¾Ð¡Ìâ3¡¿±ûͬѧÓÃÊýÂëÉãÏñ»ú¶ÔƽÅ×Ô˶¯½øÐÐÑо¿£¬ËûÅÄÉã²¢¼Ç¼ÁËÅ×ÎïÏ߹켣µÄÒ»²¿·Ö£¬ÈçͼËùʾ¡£Oµã²»ÊÇÅ׳öµã£¬xÖáÑØˮƽ·½Ïò£¬ÓÉͼÖÐËù¸øµÄÊý¾Ý¿ÉÇó³öƽÅ×ÎïÌåµÄ³õËÙ¶ÈÊÇ m/s ¡££¨gÈ¡10m/s2£©
![](http://thumb.1010pic.com/pic5/tikupic/12/f/055kf.png)
¡¾Ð¡Ìâ1¡¿D
¡¾Ð¡Ìâ2¡¿0.72 0.64
¡¾Ð¡Ìâ3¡¿4
½âÎö¿¼µã£ºÑо¿Æ½Å×ÎïÌåµÄÔ˶¯£»Ì½¾¿Ð¡³µËÙ¶ÈËæʱ¼ä±ä»¯µÄ¹æÂÉ£®
·ÖÎö£º£¨1£©ÓÃDIS²â±äËÙÖ±ÏßÔ˶¯µÄ˲ʱËٶȵÄÊǹâµçÃÅ´«¸ÐÆ÷£¬Í¨¹ý²â¶¨µ²¹âµÄʱ¼ä£¬´Ó¶øµÃ³öÔÚµ²¹âʱ¼äÄÚµÄƽ¾ùËٶȣ¬ÓÃƽ¾ùËٶȴúÌæ˲ʱËٶȣ®
£¨2£©AµãÊÇ0BµÄÖмäʱ¿Ì£¬Í¨¹ýÇóOBµÄƽ¾ùËٶȱíʾAµãµÄ˲ʱËٶȣ®Í¨¹ý¡÷x=aT2£¬ÀûÓÃÖð²î·¨Çó³öÖ½´øÔ˶¯µÄ¼ÓËٶȣ®
£¨3£©ÊúÖ±·½ÏòÉÏ×ö×ÔÓÉÂäÌåÔ˶¯£¬Í¨¹ý¡÷y=gT2Çó³öÏàµÈµÄʱ¼ä¼ä¸ô£¬ÔÙͨ¹ýˮƽ·½ÏòÉϵÄÔÈËÙÖ±ÏßÔ˶¯Çó³öƽÅ×Ô˶¯µÄ³õËٶȣ®
½â£º£¨1£©ÓÃDIS²â±äËÙÖ±ÏßÔ˶¯µÄ˲ʱËٶȵÄÊǹâµçÃÅ´«¸ÐÆ÷£¬¹ÊÑ¡D£®
£¨2£©vA==
m/s¡Ö0.72m/s£®
ÀûÓÃÖð²î·¨Çó³ö¼ÓËÙ¶Èa==
m/s2=0.64m/s2£®
£¨3£©¸ù¾Ý¡÷y=gT2µÃ£¬T==
s=0.1s£®ÔòƽÅ×Ô˶¯µÄ³õËÙ¶Èv0=
=
m/s=4m/s£®
¹Ê´ð°¸£º£¨1£©D £¨2£©0.72 0.64£¨3£©4
![](http://thumb2018.1010pic.com/images/loading.gif)
£¨8·Ö£©ÈýλͬѧÓò»Í¬µÄÆ÷²Ä·Ö±ð½øÐÐÈçÏÂʵÑ飺
£¨1£©¼×ͬѧÀûÓÃÏÖ´úÐÅÏ¢¼¼Êõ½øÐÐDISʵÑé¡£ÈçͼËùʾΪÓÃDIS²â±äËÙÖ±ÏßÔ˶¯µÄ˲ʱËٶȵÄ×°ÖÃͼ£¬Í¼ÖТÙËùʾµÄÆ÷²ÄΪ____¡ø_____
A£®Î»ÒÆ´«¸ÐÆ÷ | B£®Ëٶȴ«¸ÐÆ÷ |
C£®Ô˶¯´«¸ÐÆ÷ | D£®¹âµçÃÅ´«¸ÐÆ÷ |
![](http://thumb.1010pic.com/pic5/tikupic/58/0/1l3pu3.jpg)
£¨3£©±ûͬѧÓÃÊýÂëÉãÏñ»ú¶ÔƽÅ×Ô˶¯½øÐÐÑо¿£¬ËûÅÄÉã²¢¼Ç¼ÁËÅ×ÎïÏ߹켣µÄÒ»²¿·Ö£¬ÈçͼËùʾ¡£Oµã²»ÊÇÅ׳öµã£¬xÖáÑØˮƽ·½Ïò£¬ÓÉͼÖÐËù¸øµÄÊý¾Ý¿ÉÇó³öƽÅ×ÎïÌåµÄ³õËÙ¶ÈÊÇ ¡ø m/s ¡££¨gÈ¡10m/s2£©
![](http://thumb.1010pic.com/pic5/tikupic/fa/2/qzydm.jpg)