物体产生振动的首要条件是离开平衡位置时就受到回复力的作用 .回复力是以效果命图 1名的力 .由于受现行高一《物理》教材第 133面 ,如图 1所示的影响 ,不少学生将单摆做简谐运动的回复力理解为摆球所受的重力和悬绳拉力的合力 ,这是不正确的 .单摆在摆动过程中 ,摆球要受两个 The primary condition for the vibration of an object is the effect of the restoring force when it leaves the equilibrium position. The restoring force is the force of the name of the image. Because it is affected by the current 133th surface of the “Physics” textbook, the effect shown in Figure 1 Many students interpret the restoring force of a simple pendulum as a harmonic motion as the combined force of the gravity of the pendulum ball and the pull force of the suspension rope. This is not correct. When the pendulum is swinging, the pendulum ball is subject to two