【单选题】刚体做定轴转动时,若【图片】,则刚体做_____。
【判断题】交比的特殊情况共线四点的交比值出现0,1,三者之一这四点中有某二点相同
【判断题】刚体绕定轴转动时,若角加速度为正,则刚体作加速转动;若角加速度为负,则刚体做减速转动。
【单选题】--- I’m sure I will get good marks in the final exam. --- I believe your parents will ______ your study if you try your best.
【判断题】刚体绕定轴转动时,若角加速度为正,则刚体做加速转动;若角加速度为负,则刚体做减速转动。
【单选题】At first I________confidence to try it,but now I’m beginning to get the idea.And my marks have improved. [ ]
【单选题】---I did very well in the Maths exam yesterday. ---I did _____ . I got full marks.
【单选题】—I'm sure I will get good marks in the mid-term exam. —I believe your parents will ______ your study if you try your best. [ ]
【判断题】在刚体做定轴转动时,若外力矩矢量和不变,则转动惯量越大,刚体转动的角加速度就越小。
【单选题】刚体做定轴转动时,若 ,则刚体做_____。