NCERT Example 9.7 - Mechanical Properties of Fluids
Question: A Boeing aircraft (mass 3.3 x 10^5 kg, wing area 500 m^2) in level flight at 960 km/h. (a) Pressure difference between lower and upper wing surfaces. (b) Fractional speed increase on upper surface. Air density 1.2 kg m^-3.
Answer: (a) **6.5 x 10^3 N m^-2**; (b) speed on top is about **8% higher**.
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