Question detail

Which option best applies force for Hooke's law and spring constant in AQA GCSE Physics Forces?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Forces and elasticity

Question

A. Extension is directly proportional to force up to the limit of proportionality — misconception focus for force
B. This confuses elastic and plastic deformation and does not answer Hooke's law and spring constant.
C. This is too vague because it does not use the force or motion quantity named in the objective.
D. This reverses the physical cause and effect for Forces and elasticity.

Answer

The correct answer is: Extension is directly proportional to force up to the limit of proportionality — misconception focus for force

Explanation

The correct option is Extension is directly proportional to force up to the limit of proportionality — misconception focus for force. Extension is directly proportional to force up to the limit of proportionality — misconception focus for force is correct because it matches the approved learning objective to use the equation force = spring constant x extension. This answer belongs to Hooke's law and spring constant within Forces and elasticity, so it must use precise AQA GCSE Physics forces and motion vocabulary. The other options are wrong because they either confuse elastic and plastic deformation, omit the required force or motion condition, or move away from the exact subtopic being tested.

Common mistake

Common Mistake in Hooke's Law

Students often confuse the spring constant with the force applied, leading to incorrect calculations of extension.

Remember that the spring constant (k) is a measure of stiffness and should be used as a multiplier in the equation F = k x e, where F is the force and e is the extension.

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