论文部分内容阅读
问题2.简谐运动中,振动物体“振动”的快慢与振动物体“运动”的快慢有何区别? (江苏省怀仁中学方雨) 答:前者是用周期和频率来描述的,后者是用速度来描述的;在简谐运动过程中,前者是恒量,后者是变量;前者从整体上描述振动情况,是振动所特有的物理量,后者是描述某一时刻物体运动情况的. (河南吴艺海) 3.某弹簧振子,其振幅为A,下列说法正确的是( ). A.在一个周期T内,振子的位移一定是零,路程一定是4A B.在半个周期内,振子的位移一定是2A,路程一定是2A C.在1/4周期内,振子的位移可能是零,路程可能小于A
Question 2. What is the difference between the “vibration” speed of a vibrating object and the speed of a “movement” of a vibrating object in a simple harmonic motion? (Fang Yu, Huairen High School, Jiangsu Province) Answer: The former is described in terms of period and frequency. It is described in terms of speed; in the process of simple harmonic motion, the former is a constant and the latter is a variable; the former describes the vibration condition as a whole and is a physical quantity unique to vibration, while the latter describes the movement of an object at a certain moment. (Henan Wu Yihai) 3. The amplitude of a spring oscillator is A. The following statement is correct (). A. In a period T, the displacement of the vibrator must be zero and the distance must be 4A B. Within a half period, The displacement of the vibrator must be 2A, the path must be 2A C. In 1/4 cycle, the displacement of the vibrator may be zero, and the distance may be less than A.