A-LevelPhysicsDynamics9702/12 · May/June 2013 · 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
✓ Correct answer
D: 16000 N
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