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→Calculating Elastic Potential Energy
x = Final Length - Original Length = 9.1 - 0.1 = 9.0m
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| style="height:20px; width:200px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
<math>E_e = \frac{1}{2} k x^2</math>
<math>E_e = 50J</math>
| style="height:20px; width:200px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
<math>E_e = \frac{1}{2} k x^2</math>
<math>E_e \approx 20,000J</math>
| style="height:20px; width:200px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
<math>E_e = \frac{1}{2} k x^2</math>