elastic potential energy

• What is elastic potential energy?

  Energy stored in a stretched spring
• How is elastic potential energy related to a stretched spring?

  A stretched spring stores energy as elastic potential energy
• What is the formula to calculate elastic potential energy in a spring?

  $U =$$0.5 \cdot k \cdot e^2$
• What does the symbol $e$ represent in the elastic potential energy formula?


  Extension of the spring in meters
• What must the extension be converted to before using the elastic potential energy formula?

  Meters
• What happens if too great a force is applied to a spring?

  The extension is no longer directly proportional to the force
• If a spring has an extension of 20 cm, what is its extension in meters?

  0.2 m
• What is the limit of proportionality in relation to springs?

  The maximum force at which extension remains proportional to force
• Given a spring constant of 100 N/m and an extension of 0.2 m, what is the elastic potential energy stored in the spring?

  $2 \text{ J}$
• What are the key points to remember when calculating elastic potential energy?

  • Use the formula: $U =$$0.5 \cdot k \cdot e^2$
  • Ensure extension $e$ is in meters
  • The spring constant $k$ varies by spring
• What type of energy do windup toys and clocks utilize?

  Energy stored in a spring
• What does applying a force to a spring do?

  It changes the length of the spring
• How does the graph of extension versus force behave within the limit of proportionality?

  It shows a straight line passing through zero
• What happens to a spring when it is stretched beyond the limit of proportionality?

  It will not return to its original length
• What is the significance of the spring constant in the elastic potential energy formula?

  It determines how much energy is stored for a given extension
• What is the unit of elastic potential energy?

  Joules (J)
• Why is it important to convert units when calculating elastic potential energy?

  To ensure accuracy in calculations
• How can you find the elastic potential energy if given the spring constant and extension?

  By using the formula $U =$$0.5 \cdot k \cdot e^2$