A-LevelPhysicsDynamicsMay/June 2013Paper 1 Q91 Mark
A strong wind of speed 33ms⁻¹ blows against a wall. The density of the air is 1.2kg m⁻³. The wall has an area of 12m² at right angles to the wind velocity. The air has its speed reduced to zero when it hits the wall. What is the approximate force exerted by the air on the wall?
A330 N
B400 N
C480 N
D16000 N
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The correct answer is D. 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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