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A-LevelPhysicsForces, density and pressureOct/Nov 2019Paper 1 Q121 Mark

Two coplanar forces act on an object as shown. [Figure showing two forces originating from an object, one pointing up-right and another pointing right] Which diagram shows the resultant F of these two forces?

ADiagram showing a resultant F vector by placing the tail of the second force at the head of the first force, and then drawing F from the tail of the first to the head of the second.
BDiagram showing a resultant F vector formed by drawing F from the tail of the first force to the tip of one of the forces.
CDiagram showing a resultant F vector by using the parallelogram rule but pointing in the opposite direction (down-left).
DDiagram showing a resultant F vector by using the parallelogram rule, pointing in the correct (up-right) direction.

✓ Correct Answer

The correct answer is D: Diagram showing a resultant F vector by using the parallelogram rule, pointing in the correct (up-right) direction.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Physics Question

Topic

This multiple-choice question tests Forces, density and pressure in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2019 examination, Paper 1 Variant 2.

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