关于振动的能量,课本中的表述是:振动的能量,跟物体的振幅有关,振幅越大,振动的能量就越大.对于弹簧振子学生不难理解,但对于单摆学生很难理解.本文拟用几何方法来证明单摆振动时的能量与振幅的关系,具体作法如下:设单摆的摆长为L,质量为m,振幅为A,悬点为O′,平衡位置为O,摆球 With regard to the energy of vibration, the expression in the textbook is: the energy of vibration is related to the amplitude of the object, and the greater the amplitude, the greater the energy of vibration. It is not difficult for the students to understand the spring oscillator, but it is difficult for the pendulum student to understand. The geometric method is used to prove the relationship between the energy and amplitude of single pendulum vibration. The specific method is as follows: Set pendulum length of single pendulum to L, mass to m, amplitude to A, hanging point to O′, balance position to O, pendulum ball