天气预报 > 其他 > 一小球和竖直的杆想撞动量守恒吗
一小球和竖直的杆想撞动量守恒吗
更新时间: 2020-10-07 00:00:00  

这个问题是无法回答的。首先要清楚,动量是矢量,而且只有在不受力或者受合外力为0的情况下才守恒,如果小球和竖杆符合上面的条件,那么动量就守恒,如果只在某个方向上符合上面的条件,那么只在这个方向上动量守恒。

关键词: 小球 动量 守恒

一小球和竖直的杆想撞动量守恒吗相关经验

天气预报

最新推荐

页面:/news/view-1461730/ | 耗时:0.1562 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=1461730 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1461730 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1461730 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1065049,1077100,1078677,1071701,1115139,1089526,1071507,1073722,1086582,1100639,1104717,1090541,1058867,1072753,1115695,1049440,1131187,1094057,1099583,1104635,1087221,1097505,1080058,1084753,1100392,1131565,1094619,1091376,1071089,1114866) ORDER BY field (ArticleID,1065049,1077100,1078677,1071701,1115139,1089526,1071507,1073722,1086582,1100639,1104717,1090541,1058867,1072753,1115695,1049440,1131187,1094057,1099583,1104635,1087221,1097505,1080058,1084753,1100392,1131565,1094619,1091376,1071089,1114866)