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一、本月知识学习指要当物体受到指向平衡位置的回复力作用且阻力足够小时 ,物体将做机械振动 .振动可分自由振动和受迫振动 .当策动力的频率跟物体的固有频率相等时将发生共振 ,振幅达最大 .简谐运动是一种变加速运动 .其特点是所受外力的合力符合 F=- kx,加速度符合 α=- kmx
First, this month’s knowledge study means that when an object is subjected to a restoring force that points to an equilibrium position and the resistance is small enough, the object will do mechanical vibration. The vibration can be divided into free vibration and forced vibration. The frequency of the driving force is equal to the natural frequency of the object. Resonance will occur and the amplitude will be maximum. Harmonic motion is a variable acceleration motion. Its characteristic is that the resultant force of the external force conforms to F=-kx and the acceleration accords with α=-kmx.