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简谐运动是最简单最基本的机械振动形式,它的最大特点是对称性.即在平衡位置两侧的对称位置上,振子的受力情况及运动时间是对称的,利用这一点,我们会很巧妙地解决诸如以下问题. 例1如图1,一根轻弹簧竖直固定在水平面上,在其正上方静止释放一质量为m的小球,小球砸到弹簧后继续向下运动(弹簧一直处在弹性限度内),则小球落至最低点时加速度a ( ).
Harmonic motion is the simplest and most basic form of mechanical vibration. Its greatest feature is symmetry. That is, on the symmetrical positions on both sides of the equilibrium position, the force condition and the motion time of the vibrator are symmetrical. Using this, we will Cleverly solve problems such as the following. Example 1 As shown in Fig. 1, a light spring is vertically fixed on a horizontal surface, and immediately above it, a ball of mass m is released, and the ball continues to move downwards after it hits the spring ( The spring is always within the elastic limit), then the acceleration a () is reached when the ball falls to the lowest point.