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Physics · 术语表

什么是 Restoring force of a spring？

又称： stiffness

Definition 28.7 High School Physics · 第 28 章 — Mechanical Oscillators and the Measurement of Time

A glider of mass $m$ slides on a horizontal frictionless rail, tied to a spring of stiffness $k$ ( $\mathrm{N}/\mathrm{m}$ ). Let $x$ be its displacement from equilibrium. Stretched or compressed, the spring pulls or pushes the glider back with the force $F = -kx$ : proportional to the displacement and opposed to it — a restoring force again, now supplied by elasticity.

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