Physics Laws & Theorems
Basic
Hooke's Law
The restoring force of a spring is proportional to its extension.
Formula
Variables
kSpring constant
xDisplacement
Example
A spring with k = 100 N/m stretched 0.2 m pulls back with 20 N.
Did You Know?
Hooke's law holds only up to the elastic limit; stretch a spring too far and it never returns.