Calculate extension from force and spring constant.

In the subtopic Hooke's law and spring constant, this learning objective focuses on calculate extension from force and spring constant. For AQA GCSE Physics 8463 Unit 4.5 Forces, keep the explanation inside Hooke's law and spring constant and Forces and elasticity. Approved keywords for this objective include force, spring constant, and extension. A strong answer separates scalar and vector quantities, uses correct units where quantities are involved, and links the physical reasoning back to calculate extension from force and spring constant. This is not a generic revision point: it is specifically about Hooke's law and spring constant, Forces and elasticity, and the approved wording of the learning objective.