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变力问题贯穿了整个高中物理,一直是物理教学中的难点,高考考查中的热点,本文重点研究普通高中物理中的四大变力之一,F=kx。利用匀速圆周运动与弹簧振子的类比证明了简谐运动,导出了周期公式;深层次挖掘了隐藏在其他变力背后的变力,在各变力间建立起了沟通的桥梁,使对变力问题的认识更加全面、系统。揭示了恒定阻力作用下弹簧振子运动的本质,为高中阶段阻尼振动的定量研究提供了方法。
The problem of variable force runs through the entire high school physics. It has always been a difficult point in physics teaching and a hot spot in college entrance examination. This article focuses on one of the four major forces of change in ordinary high school physics, F = kx. The simple harmonic motion is proved by the analogy of the constant circular motion and the spring oscillator, and the periodic formula is deduced. The variable hidden behind the other variable forces is deeply tapped and a bridge of communication is established between each variable force so that the force The understanding of the problem is more comprehensive and systematic. The essence of the spring oscillator’s vibration under constant resistance is revealed, which provides a method for the quantitative study of damping vibration in high school.