Hooke's Law
Hooke's Law states that the force needed to stretch a spring is directly proportional to the extension of the spring up to the limit of proportionality.
F = kΔL
where ΔL is change in length.

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Key terms in this lesson
- Limit of proportionality
- The point beyond which the extension of a material is no longer directly proportional to the applied force.
More in Materials
- Density
- Measuring Density
- The Density of Alloys
- Springs in Parallel
- Springs in Series
- The Energy Stored in a Stretched Spring
- Tensile and Compressive Forces
- Tensile Stress
All 18 lessons in Materials · All AQA AS-level Physics topics