Practice question
Question
An aircraft (m\=2.5×105kg, wing area 500m2) flies level. What is the pressure difference across the wings? (Take g\=9.8m/s2)
Explanation
ΔP⋅A = mg. mg = 2.5×105×9.8 = 2.45×106N, A = 500m2. ΔP = 2.45×106500 = 4900Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 4900 Pa. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.
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