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: The '''elastic potential energy store''' of an [[object]] is related to two [[property|properties]] of the [[object]]:
*The [[Spring Constant]] of the [[object]]. - The amount of [[force]] needed to stretch or squash it's shape by a given distance. The greater the [[Spring Constant|spring constant]] the greater the '''elastic potential energy''' stored.
*The [[Extension (Physics)|extension]] of the [[object]]. - The distance that the [[object]] has been stretched or squashed. The greater the [[Extension (Physics)|extension]] the greater the '''elastic potential energy''' stored.
===Equation===
k = The [[Spring Constant|spring constant]] of the [[object]].
x = The [[Extension (Physics)|extension]] of the [[object]].
===Calculating Elastic Potential Energy===
Final Length = 9.1m
'''Find the [[Extension (Physics)|extension]].'''
x = Final Length - Original Length = 9.1 - 0.1 = 9.0m