AQA GCSE Triple Science – Physics Practice Test

Which energy store is stored in a stretched or compressed spring?

Elastic potential energy Magnetic energy Gravitational potential energy Chemical energy

Correct Answer:

Elastic potential energy

Explanation:

Elastic potential energy is stored in a stretched or compressed spring. When you push or pull the spring, you do work on it and deform it, which stores energy in the spring's structure. The amount stored depends on how much you change its length (x) and how stiff the spring is (k), given by the form 1/2 k x^2. When the spring returns to its natural length, that stored energy can be released as motion. This is different from magnetic energy (stored in magnetic fields), gravitational potential energy (depends on height in a gravitational field), or chemical energy (stored in chemical bonds).

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