GCSE Physics – Elastic potential energy

Last updated: 27/05/2020

Learning Objectives

-I can describe how elastic potential energy changes
-I can recall the units needed for Ee = ½ ke2^2
-I can rearrange Ee = ½ ke2^2
-I can use Ee = ½ ke2^2

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  1. Current
  2. Review
  3. Answered
  1. What is true for springs?

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  2. What is elastic potential energy (EPE)?

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  3. How is elastic potential energy calculated?

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  4. What is the spring constant?

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  5. What is elastic potential energy measured in?

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  6. What is extension measured in?

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  7. What is the spring constant measured in?

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  8. When is the formula for elastic potential energy correct?

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  9. What is the limit of proportionality?

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  10. How can we change the elastic potential energy of an object?

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  11. How else can we change the elastic potential energy of an object?

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  12. If extension doubles, what happens to elastic potential energy?

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  13. Convert 10 mN/cm into N/m.

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  14. Convert 0.001 GN/m into N/cm.

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  15. If two springs with the same spring constant 150 N/m have 150 J and 600 J of energy each,

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  16. What is the elastic potential energy if extension is 20 cm and k is 4 N/m?

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  17. What is the elastic potential energy if extension is 50 cm and k is 25 N/m?

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  18. What is the elastic potential energy if k is 50 N/m and extension is 1.2 m?

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  19. A spring of constant 6 N/m is extended 30 cm. What is the elastic potential energy?

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  20. What extension of a spring with constant 8 N/m would result in 144 J of elastic potential energy being stored?

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  21. What extension of a spring with constant 120 N/m would result in 300 J of elastic potential energy being stored?

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  22. A spring is stretched so that 12 J of elastic potential energy is stored. It has spring constant 3000 N/m, so what is the extension?

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  23. A spring is stretched so that 300 J of elastic potential energy is stored. If the constant is 30 N/m, what is the extension?

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  24. If elastic potential energy is 200 J and extension is 20 cm, what is the spring constant?

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  25. If a spring is extended 50 cm and there is 500 J of elastic potential energy, what is the constant k?

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