Energy

• Elastic Potential Energy (EPE):

  The energy stored in elastic materials as the result of being stretched or compressed.
• Elastic Potential energy (J) = 0.5 x Spring constant (N/m) x (Extension)^2 (m)
• Extension = 0.072m

  
• 44000 N/m

  
• • Use a tape measure
  • take repeat readings and calculate a mean

  
• Extension:

  Increase in length from original length.
• Extension = length after stretching - original length
• When a spring or rubber band is stretched, the work done is stored as elastic potential energy.
• Spring constant (N/m) = Elastic Potential energy (J) / 0.5 x (Extension)^2 (m)
• • Extension = Elastic Potential energy (J) / 0.5 x Spring constant (N/m), then square root the ans.