如图所示,一质量为 m 的物体 A 放在一与水平面成 q 角的固定光滑斜面上,并系度系数为 k 的轻弹簧的一端,弹簧的另一端固定.设物体沿斜面的运动中 , 在平衡位置处的初动能为 E K 0 ,以弹簧原长处为坐标原点,沿斜面向下为 x 轴正向,试求: (1) 物体 A 处于平衡位置时的坐标 x 0 . (2) 物体 A 在弹簧伸长 x 时动能的表达式.
【简答题】be projected to be derived from fill up clear up pose a risk to be upon hinge on factor in Before going further, let me an important point about the organization...
【简答题】You are going to listen to a meeting about saving energy in an office. Before you listen, read the text below and write the words in bold next to the definitions. measures to reduce energy cons...