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?
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. This question tests the candidate's understanding of dynamics within the Physicssyllabus. The examiner's mark scheme requires...
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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...
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