位移大小正负怎么比较,是绝对值么
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/29 03:23:12
位移大小正负怎么比较,是绝对值么
速度大小呢`````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````
速度大小呢`````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````
用绝对值