Example 1
With k = 200 N/m and an extension of 10 cm, the spring stores 1 J.
Mendeleev
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Physics tools › Elastic potential energy
Mendeleev · Physics
Elastic potential energy
A deformed spring stores elastic potential energy. Because extension is squared, doubling the deformation multiplies the stored energy by four.
Formula usedE = ½kx²
Visual cue · spring
Calculate
Elastic potential energy
What do the symbols mean?
Eenergy
kspring constant
xextension
Two worked examples
Example 2
A spring storing 4 J at 20 cm has k = 200 N/m.
Good to knowThis expression applies to a spring that follows Hooke’s law.