ÌâÄ¿ÄÚÈÝ
ÇáÖʵ¯»ÉµÄÉ϶˹̶¨ÔÚµçÌݵÄÌ컨°åÉÏ£¬µ¯»É϶ËÐü¹ÒÒ»¸öСÌúÇò£¬µçÌÝÖÐÓÐÖÊÁ¿Îª50 kgµÄ³Ë¿Í£¬ÈçͼËùʾ£¬ÔÚµçÌÝÔËÐÐʱ£¬³Ë¿Í·¢ÏÖÇáÖʵ¯»ÉµÄÉ쳤Á¿ÊǵçÌݾ²Ö¹Ê±ÇáÖʵ¯»ÉµÄÉ쳤Á¿µÄÒ»°ë£¬ÕâÒ»ÏÖÏó±íÃ÷£¨gÈ¡10 m/s2£©
[ ]
A£®µçÌÝ´Ëʱ¿ÉÄÜÕýÒÔ´óСΪ1 m/s2µÄ¼ÓËٶȼõËÙÉÏÉý£¬Ò²¿ÉÄÜÒÔ´óСΪ1 m/s2µÄ¼ÓËٶȼÓËÙϽµ
B£®µçÌÝ´Ëʱ¿ÉÄÜÕýÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼõËÙÉÏÉý£¬Ò²¿ÉÄÜÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼÓËÙϽµ
C£®µçÌÝ´Ëʱ¿ÉÄÜÕýÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼÓËÙÉÏÉý£¬Ò²¿ÉÄÜÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼõËÙϽµ
D£®ÎÞÂÛµçÌÝ´ËʱÊÇÉÏÉý»¹ÊÇϽµ£¬Ò²ÎÞÂÛµçÌÝÊǼÓËÙ»¹ÊǼõËÙ£¬³Ë¿Í¶ÔµçÌݵذåµÄѹÁ¦´óСһ¶¨ÊÇ250 N
B£®µçÌÝ´Ëʱ¿ÉÄÜÕýÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼõËÙÉÏÉý£¬Ò²¿ÉÄÜÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼÓËÙϽµ
C£®µçÌÝ´Ëʱ¿ÉÄÜÕýÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼÓËÙÉÏÉý£¬Ò²¿ÉÄÜÒÔ´óСΪ5 m/s2µÄ¼ÓËٶȼõËÙϽµ
D£®ÎÞÂÛµçÌÝ´ËʱÊÇÉÏÉý»¹ÊÇϽµ£¬Ò²ÎÞÂÛµçÌÝÊǼÓËÙ»¹ÊǼõËÙ£¬³Ë¿Í¶ÔµçÌݵذåµÄѹÁ¦´óСһ¶¨ÊÇ250 N
BD
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
![¾«Ó¢¼Ò½ÌÍø](http://thumb.1010pic.com/pic3/upload/images/201311/12/1d499396.png)
A¡¢µçÌÝÒ»¶¨ÊÇÔÚϽµ | B¡¢µçÌÝ¿ÉÄÜÊÇÔÚÉÏÉý | C¡¢µçÌݵļÓËٶȷ½ÏòÒ»¶¨ÏòÉÏ | D¡¢³Ë¿ÍÒ»¶¨´¦ÓÚʧÖØ״̬ |