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| style="height:20px; width:200px; text-align:center;" |A stretched bow stores '''elastic potential energy.''' The further it is stretched the more [[energy]] it stores.
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==Key Stage 4==
===Meaning===
The '''elastic potential energy store''' is an [[Energy Store|energy store]] associated with stretched, squashed and twisted elastic [[object]]s.
===About Elastic Potential Energy===
: Any [[object]] that returns to its original shape after a [[Deformation|deforming]] [[force]] has been removed is able to store '''elastic potential energy'''.
: '''Elastic potential energy''' is a [[Potential Energy]] store.
: 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===
''NB: You will be given this equation in the formula sheet.''
'' '''Elastic Potential Energy''' = 0.5 x (Spring Constant) x (Extension)<sup>2</sup>''
<math>E_e = \frac{1}{2} k x^2</math>
Where:
E<sub>e</sub> = '''Elastic Potential Energy''' stored.
k = The [[Spring Constant|spring constant]] of the [[object]].
x = The [[Extension (Physics)|extension]] of the [[object]].