A-LevelPhysicsWork, energy and powerFeb/Mar 2018Paper 1 Q161 Mark

A bead is released from rest at point P and slides along a wire, as shown. [Figure 16.1] The track loops around and forms a vertical circle of diameter 40 cm. At point Q, the bead has a speed of 1.4 ms⁻¹. Air resistance and friction on the wire are negligible. What is the height h from which the bead is released?

Q: What is the correct answer to this A-Level Physics question?

The correct answer is C: 0.50 m.

Q: What topic does this question test?

This question tests Work, energy and power in A-Level Physics (syllabus code 9702). It is worth 1 mark.

A0.30 m

B0.40 m

C0.50 m

D0.60 m

✓ Correct Answer

The correct answer is C: 0.50 m

📋 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 Work, energy and power in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Feb/Mar 2018 examination, Paper 1 Variant 2.

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