A-LevelPhysicsDynamicsFeb/Mar 2017Paper 1 Q101 Mark

A stationary firework explodes into three pieces. The masses and the velocities of the three pieces immediately after the explosion are shown. [Figure showing explosion fragments with masses 50g, 50g, 100g and velocities V₁, V₂, 8 ms⁻¹ at angles] What are speed v₁ and speed v₂?

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

The correct answer is B: v₁/ms⁻¹: 9.2, v₂/ms⁻¹: 9.2.

Q: What topic does this question test?

This question tests Dynamics in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Av₁/ms⁻¹: 4.0, v₂/ms⁻¹: 4.0

Bv₁/ms⁻¹: 9.2, v₂/ms⁻¹: 9.2

Cv₁/ms⁻¹: 14, v₂/ms⁻¹: 14

Dv₁/ms⁻¹: 16, v₂/ms⁻¹: 16

✓ Correct Answer

The correct answer is B: v₁/ms⁻¹: 9.2, v₂/ms⁻¹: 9.2

📋 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 Dynamics in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Feb/Mar 2017 examination, Paper 1 Variant 2.

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