Physics (AS & A Level) · Feb / March 2024 · Paper 12 · Question 21
9702Elastic and plastic behaviour
A spring is fixed at one end and extended by applying force F to the other end. The spring has extension x and elastic potential energy E_P. The spring constant is k. The spring obeys Hooke's law. Which relationship is correct for this spring?
- AE_P ∝ F
- BE_P ∝ x
- CE_P ∝ k
- DE_P ∝ x²
As printed in the paper
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Correct answer: D. E_P ∝ x²
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