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Mechanics
Spring Potential Energy
P
E
=
1
2
k
x
2
PE = \frac{1}{2}kx^2
P
E
=
2
1
k
x
2
PE = 1/2kx²
Elastic potential energy stored in a spring.
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Variables
PE
Potential energy
Energy in spring
J
k
Spring constant
Spring stiffness
N/m
x
Displacement
Stretch/compression
m
Derivation
Work to stretch spring: W = ∫kx dx = ½kx².
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