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A-LevelPhysicsForces, density and pressureOct/Nov 2018Paper 1 Q131 Mark

A kite is in equilibrium at the end of a string, as shown. [Figure 13.1] The kite has three forces acting on it: the weight W, the tension T in the string, and the force F from the wind. Which vector diagram represents the forces acting on the kite?

Adiagram showing the three force vectors (W, T, F) arranged tail-to-head, forming a closed triangle.
Bdiagram showing the three force vectors (W, T, F) arranged tail-to-head, forming an open path (not in equilibrium), where W points downwards, T points up-left, F points down-left.
Cdiagram showing the three force vectors (W, T, F) arranged tail-to-head, forming an open path (not in equilibrium), where W points downwards, T points up-left, F points up-left.
Ddiagram showing the three force vectors (W, T, F) arranged tail-to-head, forming an open path (not in equilibrium), where W points downwards, T points up-right, F points right.

✓ Correct Answer

The correct answer is A: diagram showing the three force vectors (W, T, F) arranged tail-to-head, forming a closed triangle.

📋 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 2018 examination, Paper 1 Variant 2.

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