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3.8 Springs

Part of Forces in Honors Physics. Read the opening section, then create a free account for the full interactive lesson, practice, and progress tracking.

Springs

Springs are objects in physics that can compress and stretch. A spring’s equilibrium point is the length of the spring without any forces acting on the spring. When a spring stretches or compresses, the spring will exert a force in the direction of this equilibrium point. Spring force is represented with the variable Fs. This force can be described with Hooke’s Law, as seen below.

Fs=−kΔxF_s=-k\Delta x
  • Fs{F_s} represents the spring force
  • k{k} represents the spring constant
  • Δx{\Delta x} represents the displacement of the spring, with stretching being positive and compressing being negative

A spring’s spring constant is a value that represents the “ stiffness ” of a spring. Spring constant is measured in units of Newtons per meter (N/m) and is represented with the variable k{k}. A higher spring constant will show a stiffer spring while a lower spring constant will show a softer spring.

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