A mass attached to a spring can be set in motion by applying a force either to the mass or the spring. We consider a problem where a short impulse is applied to the spring in an attempt to project the mass at maximum speed. The problem arises when swinging a flexible golf club or a fishing rod, both of which vibrate at low frequency as a mass–spring system. It is shown that maximum speed of the mass at the end of a spring usually arises when the impulse duration is slightly greater than half of the vibration period of the mass–spring system. If that condition is maintained then the speed will increase if the amplitude of the impulse is increased and/or if the vibration frequency of the mass–spring system is increased. Experimental results are presented for a steel ball attached to a soft spring, and also for a short fishing rod, both being suitable for student experiments.

中文翻译：

---

机械谐振器的脉冲激励：质量弹簧系统和钓鱼竿

可以通过向质量块或弹簧施加力来使附着在弹簧上的质量块运动。我们考虑了一个问题，即在弹簧上施加短脉冲以试图以最大速度投射质量。当挥动挠性高尔夫球杆或钓鱼竿时，会出现问题，这两种振动都会作为质量弹簧系统而低频振动。结果表明，当脉冲持续时间略大于质量-弹簧系统振动周期的一半时，通常会在弹簧末端产生最大质量速度。如果保持这种状态，那么如果脉冲幅度增加和/或质量弹簧系统的振动频率增加，则速度将增加。给出了附在软弹簧上的钢球以及短钓鱼竿的实验结果，