Physics
Hooke's Law Calculator
Find the spring force from stiffness and extension.
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Hooke's law says a spring's restoring force is proportional to how far it is stretched.
The math behind it
F = k·x, where k is the spring constant (stiffness) and x is the displacement from rest.
Worked Example
k = 200 N/m stretched 0.1 m → 20 N.
Frequently Asked Questions
When does it break down?
Beyond the elastic limit, where the spring deforms permanently.
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