Question detail

Which option best applies moment for Moments and turning effects (physics only) in AQA GCSE Physics Forces?

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

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At a glance

MCQ

Type

practice

Style

Topic

Moments, levers and gears (physics only)

Question

A. Moment = Force x Distance — application focus for moment
B. This confuses moment and force and does not answer Moments and turning effects (physics only).
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 Moments, levers and gears (physics only).

Answer

The correct answer is: Moment = Force x Distance — application focus for moment

Explanation

The correct option is Moment = Force x Distance — application focus for moment. Moment = Force x Distance — application focus for moment is correct because it matches the approved learning objective to (Physics only) Apply MS 3b and MS 3c skills when rearranging the moment equation. This answer belongs to Moments and turning effects (physics only) within Moments, levers and gears (physics only), so it must use precise AQA GCSE Physics forces and motion vocabulary. The other options are wrong because they either confuse moment and force, omit the required force or motion condition, or move away from the exact subtopic being tested.

Common mistake

Rearranging the Moment Equation

Students often treat the moment equation M = F × d as if F and d are interchangeable, writing F = M ÷ d and d = M ÷ F but then mistakenly use the same symbol for both when solving, leading to incorrect units or values.

Remember that M, F and d are distinct quantities: M is in N·m, F in N and d in m. When rearranging, keep the symbols separate and check units: F = M ÷ d (N = N·m ÷ m) and d = M ÷ F (m = N·m ÷ N).

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