Discussion
An aircraft flies at \(V = 100\) m/s in air of density \(1.225\) kg/m cubed. The dynamic pressure is closest to
Answer: A
Correct answer: 6125 Pa
\[ q = \tfrac{1}{2}\rho V^2 = 0.5 \times 1.225 \times 100^2 = 6125\ \text{Pa.} \] Dropping the factor of one half gives 12 250 Pa, which is the distractor most often chosen. Dynamic pressure is the quantity that scales every aerodynamic force, so an error here propagates straight into the lift and drag.
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