Mechanics
Hooke's Law
Spring force is proportional to displacement, opposite in direction.
Variables
FN
Spring force
Restoring force
kN/m
Spring constant
Spring stiffness
xm
Displacement
Extension from equilibrium
Derivation
Empirical law for elastic materials within elastic limit.
Your notes
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Common questions
What is the Hooke's Law formula?
Hooke's Law is written F = -kx. Spring force is proportional to displacement, opposite in direction. It belongs to Mechanics, under Dynamics.
What are the units in F = -kx?
In SI units, F is spring force, measured in kg·m/s²; k is spring constant, measured in kg/s²; x is displacement, measured in m.
How is the Hooke's Law formula derived?
Empirical law for elastic materials within elastic limit. The result is F = -kx.