问题的提出:一个小球在水平面的上方某一位置由静止开始下落,与地面相撞后向上弹起,到达最高点后又开始下落……这样的运动是不是机械振动? 有不少参考资料和一些教师认为这不是机械振动.理由是小球的位置并没有越过平衡位置,只是在平衡位置的上方上下运动,而不是在平衡位置的两侧往返运动,其运动的特点与机械振动的特点不符,所以小球的运动不是机械振动, The question is put forward: A small ball falls from a position above the water level from rest, bounces up after colliding with the ground, and then falls again after reaching the highest point... Is this movement mechanical vibration? There are many references And some teachers think that this is not a mechanical vibration. The reason is that the position of the ball does not cross the equilibrium position. It just moves up and down above the equilibrium position instead of moving back and forth on both sides of the equilibrium position. The characteristics of its movement and the characteristics of mechanical vibration. Does not match, so the movement of the ball is not a mechanical vibration.